Code P-0171
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2nd Gear
Joined: Jun 2010
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From: Chantilly VA
Code P-0171
I have a 2008 C6 LS3 Corvette with 4,500 miles on it. About 6 months ago the check engine light came on and the diagnostic was that the sensor voltage was dropping below the threshold(code p-0171). After researching this code it seems that there could be an air intake flow problem or that the car is running to (rich) or (lean). Anyway, the problem was fixed and the Corvette computer was wiped cleaned and restored to its original settings. YESTERDAY the engine light came on again and the diagnostic is the same problem! The engine seems to "gargle" and struggle when I start it untill it warms up a little. It also seems like the response of power I get from hitting the accelerator is a bit delayed at times. Anyone know why the problem continues to persist? It's a brand new car, barely driven and I ALWAYS put premium fuel in the tank.
Thanks. Bruce Wyan
Thanks. Bruce Wyan
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
* Vacuum hoses for splits, kinks, and proper connections. Refer to Emission Hose Routing Diagram .
* Crankcase ventilation valve and/or system for leaks. Refer to Crankcase Ventilation System Description .
* Contaminated fuel. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
* PCM and sensor grounds are clean, tight and in the proper locations.
* Air induction system after MAF sensor for vacuum leaks.
* Engine mechanical failure. Refer to Base Engine Misfire Diagnosis in Engine Mechanical 5.7L.
* Bank 1 exhaust leaks, missing or loose exhaust hardware.
* Bank 1 HO2S 1 is installed securely and the electrical connector not contacting exhaust system or ignition wires.
* Engine mechanical failure. Refer to Base Engine Misfire Diagnosis in Engine Mechanical 5.7L.
* Vacuum leaks that will only affect bank 1, such as the intake manifold, the injector O rings, etc.
Those are what I see in the Helms for that code.
Elmer
* Crankcase ventilation valve and/or system for leaks. Refer to Crankcase Ventilation System Description .
* Contaminated fuel. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
* PCM and sensor grounds are clean, tight and in the proper locations.
* Air induction system after MAF sensor for vacuum leaks.
* Engine mechanical failure. Refer to Base Engine Misfire Diagnosis in Engine Mechanical 5.7L.
* Bank 1 exhaust leaks, missing or loose exhaust hardware.
* Bank 1 HO2S 1 is installed securely and the electrical connector not contacting exhaust system or ignition wires.
* Engine mechanical failure. Refer to Base Engine Misfire Diagnosis in Engine Mechanical 5.7L.
* Vacuum leaks that will only affect bank 1, such as the intake manifold, the injector O rings, etc.
Those are what I see in the Helms for that code.
Elmer
Melting Slicks
Joined: Nov 2005
Posts: 2,345
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From: Houston 06 C6 Ysi SC 402 fgd TX
I would also do a search on how to clean the MAF sensor. and do that too. verrrry carefully. it is delicate.
also check the connections on the MAF as well. trace it down to the first y in the harness and make sure all the connections are good...
also check the connections on the MAF as well. trace it down to the first y in the harness and make sure all the connections are good...
