P0171
#1
P0171
Hello! I have a problem with the CEL reading the code P0171.
It came on last Sunday while I was in downtown San Francisco, after I did a hard stop(since I realized there was a parking ticket on my windshield...). I cleared the code but the day after it came back on again. The car is running fine though so it has me wondering what exactly is causing the code.
Thank you in advance.
It came on last Sunday while I was in downtown San Francisco, after I did a hard stop(since I realized there was a parking ticket on my windshield...). I cleared the code but the day after it came back on again. The car is running fine though so it has me wondering what exactly is causing the code.
Thank you in advance.
#2
P0171 is a lean fuel condition. first check for any vacuum leaks in the system, PCV, brake booster etc...you SHOULD check fuel pressure as well. if all these checkout ok, then you may need to test the IAT sensor. out of adjustment valves can also cause this code to set.
#5
I was inspecting for leaks or cracks and noticed that something wasn't connected to the intake tube that connects to the air filter. Not sure what the piece is called but I plugged it back in and am gonna drive the car around and see if that was the problem and I will definitely check if the valves need adjustments.
Last edited by LezPez; 06-07-2013 at 03:29 PM.