Bmw po174 code

The P0174 code means that the O2 sensor on bank 2 has recognized a too lean mixture, and the imbalance is too great for the O2 sensor to correct the issue on its …

Bmw po174 code. Trouble code P0174 will opulate when the engine control module ( ECM) detects a lean condition in the vehicle. “Lean condition” means that there is too much air and not enough fuel in the vehicle’s air to fuel ratio (AFR). One of the many functions of a vehicle ;s ECM is to adjust the lean operating conditions of your vehicle back to a ...

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The FIXD wireless OBD2 scanner and free app for iPhone and Android translates your check engine light into plain English so you can rest easy. In this video,...shanneba. 2557 posts · Joined 2008. #8 · Oct 11, 2010. Since you are only getting P0174 lean on bank 2 (cylinders 4-6) you could check the O2 sensor voltage with diagnostic software like a GT1/DIS Autoenginuity etc. There is an air distribution part on the top of the intake manifold.Summary. Diagnostic trouble code (DTC) P0174 stands for “System Too Lean (Cylinder Bank 2).”. Your vehicle’s powertrain control module (PCM) will log this trouble code if it detects a lean running condition in the engine’s cylinder bank 2. The usual causes of a P0174 code are outdated PCM software, vacuum leaks, a bad mass airflow ...In this episode I go over the p0174 obd2 code for a 2003 bmw 525i. this code is usually cased by too much air getting in the engine. usually caused by broke,...Sirius satellite radio is available in many new cars, including Jaguar, Mazda, Ford, Jeep, Chrysler, Dodge, Mercedes-Benz, BMW, Volvo, Volkswagen and Audi vehicles. If your new car...

Code of Ordinances. Code of Ordinances. Supplement 17. Online content updated on January 17, 2024. MunicodeNEXT, the industry's leading search application with over …If you’re looking to upgrade your BMW and get the most out of your vehicle, then you should consider investing in the Shadowline package. This package is designed to give your BMW ...Causes of Code P0174. To throw a P0174 code, part of your engine is either letting in too much air or not pumping a large enough amount of fuel. In rare instances, the sensor could be faulty. However, a vacuum leak or problem with the fuel pump is the more common culprit. Any crack or leak in the vacuum system will allow …Diagnostic trouble code P0174 means system too lean bank 2. This means the powertrain control module (PCM) has detected lean conditions in bank 2 in the air-fuel ratio (AFR). Lean conditions mean there is too much air or too little fuel. Bank here means the location of the cylinder head in v-type engines. Check out this article, bank 1 and …Basically this P0174 code means that the upstream oxygen sensor in bank 2 reporting a lean condition (too much oxygen in the exhaust). On V6/V8/V10/V12 engines, Bank 2 is the side of the engine that doesn't have cylinder #1. The engine uses what are called O2 or oxygen sensors in the exhaust stream to determine the air to fuel ratio of the ...I have a 2005 bmw x3 and codes p0171 and p0174. 1. Intake boot replaced with after market. 2. MAF replaced with after market. 3. All other hoses checked out okay and no visual leaks. 4. Tried a Autozone brand MAF, $300 price tag, reset by pulling battery terminal for over an hour and replaced.How to Fix P0174 Engine Code in 2 Minutes [2 DIY Methods / Only $8.99] - YouTube. nonda. 91.2K subscribers. Subscribed. 1.3K. 333K views 3 years ago UNITED …

What is the P0174 Code? The P0174 fault code stands for system too lean (bank 2). What this means in simple terms is that the engine is experiencing a ‘lean condition’. It’s normal for the ECU to make slight adjustments to the air to fuel ratio as you drive, but when running lean is definitely out of ordinary no matter what car you drive.Today we tackle the annoying problem of lean codes on our e46 2003 330CI convertible. This was caused by a vacuum leak on the intake b... Welcome back everyone! Today we tackle the annoying ...Hydrogen-powered Cars - Automakers are in the developmental stages of fuel cell technology, so hydrogen-powered cars may be available soon. Learn about hydrogen-powered cars here. ...2003 Bmw 530i P0185 P0171 p0174 P0420 I am working on a bmw its getting the previous listed codes. Sometimes you can drive it 50-75 miles and then it comes on and sometimes it comes on at 5 miles. I need to get it inspected so i can get a tag for it, i just bought it and the check engine light was on for the cam sensor and alternator, we swapped them out …I was getting OBDII codes P0174, P0171, P0313, P1085 that typically indicate a vacuum leak, according to a lot of BMW forums. None of those sites lead me to...May 2, 2016 · The pattern has repeated without fail for the past several days now. The codes read as P0174 and P1085. I am still reading up on previous posts on these codes. I've dealt with my fair share of lean codes before, including changing the all the rubber boots after MAF, cleaning MAF, CCV overhaul, etc.

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Hey guys, today I have a 2007 BMW 328i and I just wanted to share a quick tip for anyone that is having trouble with a check engine light and codes P0171 or ...The German luxury automaker BMW may be joining other car manufacturers in the ride-sharing space, to compete with Uber and Lyft. By clicking "TRY IT", I agree to receive newsletter...P0174 too lean bank 2. About 3 days ago I finished installing the started on my bmw e46 2.5, installed a new air intake manifold gasket, throttle body gasket, cleaned the injector, new vacuum caps and lines, new disa valve, cleaned my MAF sensor. And it did run fine, check engine light wasn't on any more and the car idle about 750 to 800.Contact Us Email. BMW of Tampa. 109 East Fowler Avenue Tampa, FL 33612. Sales: (813) 733-6246 Service: (813) 680-2445 Parts: (813) 733-6303

Answered by a Fixya Expert. Hello, I have a 2010 BMW X3. Got a P00BC, P0171, and P0174 code. Got MAF sensor changed, but mechanic said when he install the new MAF, he got the same code, so he install my old MAF back. Look online about testing MAF sensor. I unplug MAF sensor to test it. I read if engine shuts off when doing this, the MAF is bad.A smoke test should make it show though. Next guess would be a cracked or broken oil return line coming off the CCV valve that goes to the dipstick. My first experience with the P0171 / P0174 codes was the broken oil return line. Second time it was the intake boot. '05 X3 3.0i Alpine White/Gray Leather/Alum.The pattern has repeated without fail for the past several days now. The codes read as P0174 and P1085. I am still reading up on previous posts on these codes. I've dealt with my fair share of lean codes before, including changing the all the rubber boots after MAF, cleaning MAF, CCV overhaul, etc.Was der P0174-Code bedeutet. Code P0174 zeigt an, dass ein Magerzustand vom Motorsteuergerät (ECM) erkannt wird. Ein magerer Zustand wird erzeugt, wenn zu viel Luft und zu wenig Kraftstoff im Luft-Kraftstoff-Verhältnis (AFR) vorhanden ist. Das ECM ist mit der Fähigkeit ausgestattet, einen mageren Zustand wieder auf normal zu stellen, jedoch ...Nov 28, 2023 · There are several common causes of code P0171 in BMW vehicles: Air intake leaks: Any vacuum leaks in the air intake system can result in an imbalance in the air-fuel mixture. Faulty oxygen sensors: A malfunctioning oxygen sensor can provide incorrect readings, leading to an imbalanced mixture. Dirty or clogged fuel injectors: If the fuel ... If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persists the front oxygen (O2) sensor may need to be replaced. ⚠ Check if your BMW have Safety Recalls.What Does the P0172 BMW Code Mean? With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module ( ECM) calculates the necessary compensation to correct …Code Tech Notes. If the P0174 is combined with the P0171 code, the problem is likely caused by an intake leak or the Intake Plenum Gasket and seals. If there are no intake leaks, the next step is to replace the air filter and clean the airflow meter. If the problem persists, the front oxygen (O2) sensor may need to be replaced.- BMW OBDII Trouble Codes - E46 P0174, P0171 Codes - E46 New Disa - Car Died Again - E46 Gas Flow Issue - E46 CCV DIY - E46 SES light - E39 stumped P0174 - Battling vacuum leaks - Cleaning the MAF sensor - Mixture too lean, P0171, P0174, P0313 . Attachments. dtc_p0174.gif.Basically this P0174 code means that the upstream oxygen sensor in bank 2 reporting a lean condition (too much oxygen in the exhaust). On V6/V8/V10/V12 engines, Bank 2 is the side of the engine that doesn't have cylinder #1. The engine uses what are called O2 or oxygen sensors in the exhaust stream to determine the air to fuel ratio of the ...All2kool. 4594 posts · Joined 2016. #3 · Mar 26, 2023. P0171 & P0174 are probably the two most common codes an E46 M54 will produce. Both of these codes are 'lean conditions', which can be caused by any number of issues. At 247k miles, the first thing to check is the Fuel Pump. Visually inspect it.

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Dec 30, 2011 · X3 3.0 CEL and codes P0171 & P0174. OK, so last week I procured a 2006 X3 and about 100 mi into the 250 mi drive home... it lit the SES light. Mileage was great; about 26 on the highway, running smooth and no apparent issues, so I figured it was a camshaft position sensor. Ran it by autozone and find the codes are P0171 & P0174 indicating lean ... 2003 Bmw 530i P0185 P0171 p0174 P0420 I am working on a bmw its getting the previous listed codes. Sometimes you can drive it 50-75 miles and then it comes on and sometimes it comes on at 5 miles. I need to get it inspected so i can get a tag for it, i just bought it and the check engine light was on for the cam sensor and alternator, we swapped them out …Your car or truck has either a P0171, P0174 lean fault code or both stored in the pc, these codes derive from Oxygen Sensor (O-2) readings. A lean code or codes suggest that there surely is too-much air in the exhaust. Bear in mind parts shops have staff members having good motives nonetheless they may not have the experience necessary to ...BMW CODE P0171 P0174 SYSTEM TOO LEAN FIX. VACUUM LEAK BMW E46 E39 E53 383 X3 X5 Z3 Z4 E60If you have BMW and you have code P0171 System Too Lean Bank 1 or co...I was getting OBDII codes P0174, P0171, P0313, P1085 that typically indicate a vacuum leak, according to a lot of BMW forums. None of those sites lead me to...BMW CODE P0700 TRANSMISSION CONTROL SYSTEM FIXIf you have a BMW that has code P0700 and transmission malfuction light or warning on you BMW we will explain w...Aug 31, 2023 · Just Google the codes followed by your car's make and model, for example: "P0171 and P0174 Ford Expedition." As one example, many report that a common cause of the P0171 and P0174 lean mixture fault in the BMW X3 is a faulty DISA valve. How to Read Your OBDII Computer Codes. Read this tutorial on how to use one particular OBDII Bluetooth code ... Feb 1, 2008 · The fault codes "2882/2883 - fuel trim, mixture too lean" are stored in the DME. CAUSE. Possible causes may include: incorrect air filter, unmetered air or a defective air mass meter. PROCEDURE. Remove and inspect the air filter element. Only the filter with the P/N 13 72 1 744 869 must be fitted. A BMW fault code P0171 or P0174 means that your engine is getting more air than fuel, also known as running "lean". Your BMW engine is equipped with oxygen sensors - small probes that extend into the exhaust system (usually near the catalytic converter) that measure the amount of oxygen left after combustion.The pattern has repeated without fail for the past several days now. The codes read as P0174 and P1085. I am still reading up on previous posts on these codes. I've dealt with my fair share of lean codes before, including changing the all the rubber boots after MAF, cleaning MAF, CCV overhaul, etc.

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693 posts · Joined 2013. #9 · Oct 19, 2013. can't fix p1415,p0171 & p0174 help. Yes, an air leaking will cause erratic engine operation. Special tools are needed when replacing this seal, but it's not that difficult. The belt …Sirius satellite radio is available in many new cars, including Jaguar, Mazda, Ford, Jeep, Chrysler, Dodge, Mercedes-Benz, BMW, Volvo, Volkswagen and Audi vehicles. If your new car...Hello guys, I got these 3 codes on my OBD scanner with a car who doesn't start. P0313 Misfire Detected With Low Fuel (I had low fuel at the time of the test) P0171 System Too Lean - Bank 1. P0174 System Too Lean - Bank 2. All start-up with the broken fuel pump, which I changed (with a cheap one, after all is a 2005 325XI with 280K km).Hey guys, today I have a 2007 BMW 328i and I just wanted to share a quick tip for anyone that is having trouble with a check engine light and codes P0171 or ...Code P0174 mainly applies to V6 or V8 engines because 4-cylinder engines generally have only one bank, though there are a few exceptions. Some of the high performance 4-cylinder and straight 6-cylinder engines (such as those in BMW and Lexus) split the cylinders into groups of two or three and call them separate banks. ... My 2004 …14/03/2024. The P0174 code is an OBD-II trouble code that stands for “System Too Lean (Bank 2) which signifies that your vehicle’s air-fuel ratio is excessively lean (there is more air than fuel in the combustion chamber). In this article, I will be talking about the P0174 trouble code, its symptoms, causes, and how to fix it.Hydrogen-powered Cars - Automakers are in the developmental stages of fuel cell technology, so hydrogen-powered cars may be available soon. Learn about hydrogen-powered cars here. ...What Does Code P0175 Mean? P0175 definition: Bank 2 has too much fuel or not enough air; Issue Severity: MODERATE– Extended driving with this code can cause internal engine damage. Repair Urgency: Get this code fixed as soon as possible to avoid damage to spark plugs, pistons, and catalytic converters. Diagnosis: It is important to …P0172 and P0175: System Too Rich. Code P0172 indicates Bank 1 of the engine has a rich fuel mixture. P0175 indicates Bank 2 of the engine has a rich fuel mixture. Engine Bank 1 is the same side of the engine as Engine Cylinder 1. Engine Bank 2 is the opposite side of the engine. A firing order and cylinder location diagram may be needed to see ...Aug 21, 2020 · Today we tackle the annoying problem of lean codes on our e46 2003 330CI convertible. This was caused by a vacuum leak on the intake b... Welcome back everyone! Today we tackle the annoying ... ….

Feb 20, 2015 · I need some help. It’s a 2002 BMW 325Ci with 143,000 miles. It has started running bad and throwing codes. The P0174 and P0171 codes are the only ones left that I can’t fix. The P0174 codes is always primary. I have 2 scanner tools, the Innova 3100 w/ABS and the Creator tool specific to BMW. I have followed the forum trying to correct the ... After clearing the codes, and driving for a while, the following occurred in this order yesterday: DTC: P0171 BMW 227, System Too Lean (Bank 1) P0174 BMW 228, System Too Lean (Bank 2) PENDING. P1083 BMW 202, Fuel Control Limit Mixture Too Lean (Bank 1 Sensor 1) P1085 BMW 203, Fuel Control Limit Mixture Too Lean (Bank 2 Sensor 1) Again, after ...Code P0174 indicates that there is a lean condition detected by the Engine Control Module (ECM). A lean condition will be created if there is too much air, and not enough fuel, in …BMW Most Common Vacuum leaks P0171 & P0174 Fault codes Explained - YouTube. HAN'S GARAGE. 16.4K subscribers. Subscribed. 512. 121K views 7 years ago …A smoke test should make it show though. Next guess would be a cracked or broken oil return line coming off the CCV valve that goes to the dipstick. My first experience with the P0171 / P0174 codes was the broken oil return line. Second time it was the intake boot. '05 X3 3.0i Alpine White/Gray Leather/Alum.24183 posts · Joined 2007. #3 · Jun 28, 2010. +1. Auto Zone always says the 0174 is 02 sensors (and it isn't). The codes for 02 are different and while it COULD be 02 sensor related, it is likely a vacuum leak. Usually a hole in the intake boot tract. Check out my YouTube Channel for DIY's and other fun stuff HERE.When it comes to luxury SUVs, few brands come close to the quality and style of BMW. But what’s the cost of a BMW SUV? In this article, we’ll explore the various factors that go in...The 29E0 BMW code is one of the fault codes that can appear on your BMW’s OBD-II scanner, specifically related to the powertrain. When this code is triggered, it indicates an issue with the fuel mixture in one of the engine’s cylinders. In more technical terms, the code signifies a “Fuel Mixture Control, Mixture Too Lean” condition. Bmw po174 code, 82. Posts. Drives: 2011 BMW 335is. Join Date: Jan 2016. Location: California. iTrader: ( 2) N54 P0174 Code - Bank 2 Running Lean. Hey guys, I've recently run into a "service engine soon" light so I scanned it and the only code that came up is the P0174 code, bank 2 running lean. My car is a 2011 BMW 335is with the DCT trannsmission., Hello guys, I got these 3 codes on my OBD scanner with a car who doesn't start. P0313 Misfire Detected With Low Fuel (I had low fuel at the time of the test) P0171 System Too Lean - Bank 1. P0174 System Too Lean - Bank 2. All start-up with the broken fuel pump, which I changed (with a cheap one, after all is a 2005 325XI with 280K km)., Hey guys, today I have a 2007 BMW 328i and I just wanted to share a quick tip for anyone that is having trouble with a check engine light and codes P0171 or ..., NEW CCV KIT: http://amzn.to/1U57cspBMW TOOL: http://amzn.to/2lb9iYLHow to diagnose the common P0171 and P0174 lean codes on a BMW M54 engine. Get rid of the ..., How to Fix P0174 Engine Code in 2 Minutes [2 DIY Methods / Only $8.99] - YouTube. nonda. 91.2K subscribers. Subscribed. 1.3K. 333K views 3 years ago UNITED …, 26 Feb 2016 ... Comments204 ; How To Diagnose A Misfire on an E46 BMW 3-Series DIY. 50sKid · 350K views ; BMW P0171 P0174 2883 2882 Bank 1/2 Lean Code diagnostics ..., All2kool. 4594 posts · Joined 2016. #3 · Mar 26, 2023. P0171 & P0174 are probably the two most common codes an E46 M54 will produce. Both of these codes are 'lean conditions', which can be caused by any number of issues. At 247k miles, the first thing to check is the Fuel Pump. Visually inspect it., Diagnosing a 2005 BMW X5 E53 with fault codes P0171 and P0174. This will also help with diagnosing BMW's 1999 to 2006 E46, E39, and E85 with an M52 or M54 en..., BMW E46 p0174 p0171. have a 2002 325i M54 engine and I keep getting these codes even though I have no vacuum leak, new spark plugs and coils, new DISA valve, me O2 sensors, new valve cover gasket and I just installed new OEM fuel pump. Do you guys think this could be caused by bad oil dipstick seal or bad fuel filter., The 29E0 BMW code is one of the fault codes that can appear on your BMW’s OBD-II scanner, specifically related to the powertrain. When this code is triggered, it indicates an issue with the fuel mixture in one of the engine’s cylinders. In more technical terms, the code signifies a “Fuel Mixture Control, Mixture Too Lean” condition., po171 po174 CODES ON A 06 X3 PO171 PO174 CHANGE O2S ALL4 STILL COME ON WAT CAN I DO - BMW 2006 X3 2.0d question. Search Fixya ... P1083 (a BMW-specific DTC Code) SEC. 1-----P0171 OBD-II Trouble Code Technical Description System Too Lean (Bank 1) Basically this means that an oxygen sensor in bank 1 …, shanneba. 2557 posts · Joined 2008. #8 · Oct 11, 2010. Since you are only getting P0174 lean on bank 2 (cylinders 4-6) you could check the O2 sensor voltage with diagnostic software like a GT1/DIS Autoenginuity etc. There is an air distribution part on the top of the intake manifold., A BMW fault code P0171 or P0174 means that your engine is getting more air than fuel, also known as running "lean". Your BMW engine is equipped with oxygen …, P0174 indicates Bank 2 of the engine has a lean fuel mixture. Engine Bank 1 is the same side of the engine as Engine Cylinder 1. Engine Bank 2 is the opposite side of the …, The P0174 went away and was replaced by a P0171 indicating Lean Bank 1. I replaced that 02 sensor and the problem was resolved. H. hfount Discussion starter. 6 posts · Joined 2007. #7 · Jun 9, 2016. Thanks, It's what I'm thinking too. I have 130K on it and O2 sensors need to be replaced anyway., Your car or truck has either a P0171, P0174 lean fault code or both stored in the pc, these codes derive from Oxygen Sensor (O-2) readings. A lean code or codes suggest that there surely is too-much air in the exhaust. Bear in mind parts shops have staff members having good motives nonetheless they may not have the experience necessary to ..., Tech Notes. The P0174 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0174 is set in along with the P0171 code, it is highly likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the Mass Air Flow ..., Top 10 Most Searched Fault Codes. This page contains the top 10 most searched BMW P and hex fault codes using this site. P Codes, How to fix code BMW X3 X5 CCV or PCV Lean Code P0171 and P0174, Nov 28, 2023 · There are several common causes of code P0171 in BMW vehicles: Air intake leaks: Any vacuum leaks in the air intake system can result in an imbalance in the air-fuel mixture. Faulty oxygen sensors: A malfunctioning oxygen sensor can provide incorrect readings, leading to an imbalanced mixture. Dirty or clogged fuel injectors: If the fuel ... , The BMW had fault codes 227 and 228 stored (P0171, P0174) indicating a lean fuel system. This means the vehicle is running lean and the DME has tried to correct the condition but has reached it upper limit. Fault codes 227 and 228 are specific to a fault when the engine is at part throttle (not idle). This tells us that it’s unlikely the lean ..., The pattern has repeated without fail for the past several days now. The codes read as P0174 and P1085. I am still reading up on previous posts on these codes. I've dealt with my fair share of lean codes before, including changing the all the rubber boots after MAF, cleaning MAF, CCV overhaul, etc., Nov 4, 2013 · E93 335i P0174 code. 2008 E93 w/N54 engine that is new to me (67k miles). I got curious, and hooked up my scanner, and it showed a pending P0174 code (Lean, bank 2). I cleared the codes, and cleared adaptive values, and so far, it has not come back. However, looking at the long term fuel trim, bank 2 is twice that of bank 1. , An independent mechanic can handle BMW code P0171 and P0174, but it’s recommended to take the vehicle to a BMW dealership for a comprehensive diagnosis and proper repair. In conclusion, BMW code P0171 and P0174 are common fuel trim system lean bank 1 and bank 2 codes that require immediate attention., I need some help. It’s a 2002 BMW 325Ci with 143,000 miles. It has started running bad and throwing codes. The P0174 and P0171 codes are the only ones left that I can’t fix. The P0174 codes is always primary. I have 2 scanner tools, the Innova 3100 w/ABS and the Creator tool specific to BMW. I have followed the forum trying to correct the ..., bluebee. I also have a P0174 (which, some say, is too lean, and other say is too rich, but, all say the MAF and vacuum leaks are common culprits). Mine threw both P0171 and P0174 Codes which, from everything I read, is a too lean condition. I had great luck using the method I mentioned previously., Causes of Code P0174. To throw a P0174 code, part of your engine is either letting in too much air or not pumping a large enough amount of fuel. In rare instances, the sensor could be faulty. However, a vacuum leak or problem with the fuel pump is the more common culprit. Any crack or leak in the vacuum system will allow …, Trouble code P0174 will opulate when the engine control module ( ECM) detects a lean condition in the vehicle. “Lean condition” means that there is too much air and not enough fuel in the vehicle’s air to fuel ratio (AFR). One of the many functions of a vehicle ;s ECM is to adjust the lean operating conditions of your vehicle back to a ... , CODE P0171 P0174 SYSTEM TOO LEAN VACUUM LEAK FIX BMW E46 325I 330I 328I 320I 323i 325xi 328xi 330xi 320xi 330CI 325CI 320CI If you have BMW and you have code..., BMW P0171 Code: Mixture Control System Too Lean. The BMW P0171 code indicates that the engine is running with a lean fuel mixture. This means that there is too much air and not enough fuel in the engine, which can cause a variety of issues. The engine may run rough, have reduced power, and may even stall., BMW Fault Code Lookup. Enter a BMW fault code (P or hex), complete the captcha, and click "Search" P-Codes will start with a P and are usually generated by generic scanners. Example: P1055 Hex Codes are typically given by more advanced scanners. Examples: 180101 or 1B9308 or 30FF., Har du problem med OBDII-kod P0174 på din BMW? Läs om möjliga orsaker, symptom och lösningar på AutoCodes.com, den bästa länken för bilreparation., BMW E46 p0174 p0171. have a 2002 325i M54 engine and I keep getting these codes even though I have no vacuum leak, new spark plugs and coils, new DISA valve, me O2 sensors, new valve cover gasket and I just installed new OEM fuel pump. Do you guys think this could be caused by bad oil dipstick seal or bad fuel filter.