P0171 Diagnostic Trouble Code Discussion for March 2016
Fuel System Lean (Bank 1)
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| Help Request | Posted | |
| 2002 Toyota RAV4 2.0L MIL Lamp on VIN: JTEHH20V52 P0171: Fuel System Too Lean (Bank 1). this rav 4 came in with lean codes on bank 1 and 2 the mass air flow was replaced an injection flush carbon flush intake manifold gaskets im leaning to injectors or air flow sensors fuel pressure is 48 psi and has good volume air flow sensors at idle at 1.0 in... |
March 03, 2016 | |
| 2008 Toyota Tundra SR5 5.7L MIL Lamp on, High fuel trim VIN: 5TBBV54148 P0171: B1 Lean. To be honest, I don't work on many of these trucks, mostly domestic. When this came in and I saw the code, and freeze frame, I immediately thought vacuum leak. I smoked the intake, checked the PCV, booster, nothing found. No exhaust leaks, ECT data is accurat... |
March 07, 2016 | |
| 2006 Ford E-250 5.4L MIL Lamp on VIN: 1FDNE24L86 ... and P0174. Problem always seems to occur at idle and is intermittent. When it does occur the LTFT numbers climb to almost +20. STFT numbers never look out of spec. Driving down the road fuel trims always look good. Fuel pressure tests within spec with and ... |
March 08, 2016 | |
| 2008 Toyota Tundra SR5 5.7L MIL Lamp on, High fuel trim VIN: 5TBBV54148 P0171: B1 Lean. To be honest, I don't work on many of these trucks, mostly domestic. When this came in and I saw the code, and freeze frame, I immediately thought vacuum leak. I smoked the intake, checked the PCV, booster, nothing found. No exhaust leaks, ECT data is accurat... |
March 08, 2016 | |
| 2002 Toyota RAV4 2.0L MIL Lamp on VIN: JTEHH20V52 P0171: Fuel System Too Lean (Bank 1). this rav 4 came in with lean codes on bank 1 and 2 the mass air flow was replaced an injection flush carbon flush intake manifold gaskets im leaning to injectors or air flow sensors fuel pressure is 48 psi and has good volume air flow sensors at idle at 1.0 in... |
March 11, 2016 |
