Mercedes Benz Truck G 550 Diagnostic Trouble Codes 0437 ,0438

Mercedes-Benz Mercedes Benz OEM Parts Mercedes Benz OE Replacement Parts

0437
Heating of component G3/3 (Left O2 sensor, before TWC [KAT]) : Short circuit to positive / Resistance of sensor heater too low (P0155)
Possible cause:
- G3/3 (Left O2 sensor, before TWC [KAT])
Affected functions:
- Engine diagnosis
- Exhaust system
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Test 1: Check component G3/3 (Left O2 sensor, before TWC [KAT]).
1. Check component G3/3 (Left O2 sensor, before TWC [KAT]).
Warning!Communication with ECU required.
0438
This fault can be ignored and erased.
Possible cause:
- This fault can be ignored and erased.
Affected functions:
- Engine diagnosis
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Test 1: This fault can be ignored and erased.
1. This fault can be ignored and erased.
Note:This fault can be ignored and erased.