P0174 Diagnostic Trouble Code Discussion for November 2016
Fuel System Lean (Bank 2)
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| Help Request | Posted | |
| 1997 Mercury Grand Marquis GS 4.6L Poor Idle Quality, MIL Lamp on VIN: 2MELM74WXV P0174: System lean bank2. Hi guys, I have this Merc with lean codes for both banks. when it first came in it was reading LTFT+25, STFT0 at idle and LTFT0, STFT+40 off idle it will change as soon as the throttle is opened and the BARO reading was 131hz so I cleaned the MAF that already ... |
November 01, 2016 | |
| 1997 Mercury Grand Marquis GS 4.6L Poor Idle Quality, MIL Lamp on VIN: 2MELM74WXV P0174: System lean bank2. Hi guys, I have this Merc with lean codes for both banks. when it first came in it was reading LTFT+25, STFT0 at idle and LTFT0, STFT+40 off idle it will change as soon as the throttle is opened and the BARO reading was 131hz so I cleaned the MAF that already ... |
November 02, 2016 | |
| 1998 Ford F-150 XL 4.2L Excessive Emissions VIN: 2FTZF1723W P0174: Fuel system lean bank 2. Vehicle will not go into closed loop for more than a couple of seconds if at all. When it does ST fuel trims go -30 but oxygen sensors don't reflect this change. Inducing a large vacuum leak improves engine idle but oxy sensors still red over 0.8volts. I am le... |
November 04, 2016 | |
| 1998 Ford F-150 XL 4.2L Excessive Emissions VIN: 2FTZF1723W P0174: Fuel system lean bank 2. Vehicle will not go into closed loop for more than a couple of seconds if at all. When it does ST fuel trims go -30 but oxygen sensors don't reflect this change. Inducing a large vacuum leak improves engine idle but oxy sensors still red over 0.8volts. I am le... |
November 05, 2016 | |
| 2004 Ford Explorer NBX 4.0L MIL Lamp on, P0174, p0171 VIN: 1FMZU73K04 P0174: System too lean bank 2. Hello all, I am stumped on this one. Constantly sets long term fuel trim at +25 on both banks. It will come down 2 or 3 points at cruise speed but goes right back to +25 at idle. With the downstream O2 sensors replaced the degraded condition of both cats was r... |
November 10, 2016 |
