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P0172, P0174, and P0175 Codes on 2004 Chrysler Concorde 3.5L Engine After MAP Sensor Replacement

Model: Unknown Fault Code: P0174 Posted: 2013-09-17 18:50

Hi everyone, I'm currently troubleshooting persistent OBD2 trouble codes: P0172 (Rich Mix Bank 2), P0174 (Rich Mix Bank 2), and P0175 (Rich Mix Bank 3) on my 2004 Chrysler Concorde with a 3.5L engine. I recently replaced the Mass Airflow (MAP) sensor, but the codes persist. I'm not sure what else to check next. Any insights or diagnostic steps would be greatly appreciated! Additional details: The vehicle runs smoothly and does not exhibit stalling or poor performance under normal driving conditions.

Related fault codes

P0172P0174P0175

Comments (2)

Anonymous 2013-09-18 04:21

The car is running, so it's not a no-start issue. Check fuel pressure — excessively high fuel pressure can cause rich mixtures on both engine banks. On this model (2004 Chrysler Concorde), ensure the EGR valve isn

Anonymous 2013-10-07 10:55

Thank you for the prompt response! I've just returned from out-of-town work, so my reply was delayed. Yes, the car runs fine under normal conditions. I'll start checking the items you mentioned — especially fuel pressure and EGR valve operation. Is there a specific diagnostic code associated with an EGR valve sticking? Does the valve close properly when RPMs increase? I don't currently have freeze frame data or fuel trim readings, but I'll gather that information as soon as possible. Thanks again for your help!