P0031 Diagnostic Trouble Code Discussion for September 2021
Air Fuel Sensor (Bank 1 Sensor 1) Heater Control Circuit Low Voltage
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| Help Request | Posted | |
| 2007 Mercedes-Benz E350 3.5L MIL Lamp on VIN: WDBUF56X07 P0031: pre cat 02 sensor heater short to ground right. Initially in addition to above codes vehicle was full of undervolt codes. Battery tested bad and replaced.Power for all four heaters comes from front SAM and seems good. Checked wiring for ground command from ecu and appears good as well.So replaced front ... |
September 30, 2021 |
