P0404 Diagnostic Trouble Code Discussion for August 2006
EGR Position Sensor Performance
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| Help Request | Posted | |
| 1997 Pontiac Grand Am SE 2.4L Hesitation, Surge, MIL Lamp on VIN: 1G2NE52T6V P0404: EGR Open Position Performance. Vehicle came in with MIL on and DTCs in memory. Looking at the data w/engine running showed TP% at 23%, EGR% at 65% but engine running smoothly. Backprobing the EGR 5V reference showed almost battery voltage and same with the TPS. But, with KOEO, they were bot... |
August 10, 2006 |
