P3040 Diagnostic Trouble Code Discussion for October 2026
Combustion Misfire Cylinder 4
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| Help Request | Posted | |
| 2021 Mercedes-Benz GLS580 4Matic 4.0L Hesitation, Surge, Misfire, MIL Lamp on VIN: W1K6G7GB8M P3040: Combustion misfiring of cylinder 4 has been detected. This Mercedes has been a head scratcher. All of the above parts have been replaced. We have the new fuel pump control module but we are looking for someone who can program it. We have a support ticket with Autel. The car idles perfectly also drives very ... |
October 10, 2026 |
