HELP! had the code PO171 show up (fuel system lean bank 1)
07-19-2004, 06:39 AM
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HELP! had the code PO171 show up (fuel system lean bank 1)
HELP me please my INTENSE PCM is due in tommorrow and today the DTC code PO171 came on. Can anyone tell me if they had that before and what fixed it. Thanks
07-19-2004, 03:04 PM
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I just had the exact same code on a 95 Chrysler Concorde, and it was due to the intake manifold gasket leaking air. Have you done your lower intake gasket yet? If not, that'* more than likely the problem.
07-19-2004, 05:38 PM
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The oxygen sensor is sensing a lean condition and is compensating by enrichening the fuel trim. Possible causes:
1. Vacuum leak. Check all vacuum lines and connections (how is the idle?).
2. Pull off the intake hose and check the MAF screen for obstruction.
3. Check throttle body, EGR and pipe, and intake for leaks.
4. Check the PCV for proper operation i.e. it rattles when shaken.
5. Check exhaust for damage and leaks before the first oxygen sensor.
6. Check that the O2 sensor is properly seated and the wiring undamaged.
The other steps involve having the scanner hooked up and checking fuel trim, idle air control solenoid and MAF (mass air flow) sensor.
Try those out and let us know how it went. Concentrate on having a good look around the intake including the injectors and throttle. Good luck.
1. Vacuum leak. Check all vacuum lines and connections (how is the idle?).
2. Pull off the intake hose and check the MAF screen for obstruction.
3. Check throttle body, EGR and pipe, and intake for leaks.
4. Check the PCV for proper operation i.e. it rattles when shaken.
5. Check exhaust for damage and leaks before the first oxygen sensor.
6. Check that the O2 sensor is properly seated and the wiring undamaged.
The other steps involve having the scanner hooked up and checking fuel trim, idle air control solenoid and MAF (mass air flow) sensor.
Try those out and let us know how it went. Concentrate on having a good look around the intake including the injectors and throttle. Good luck.
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