What does code P0141 mean on a Mercedes-Benz and is it safe to drive?
P0141: O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2). Here’s what it means on your Mercedes-Benz, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
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What this code means
Heater circuit fault for the downstream O2 sensor, bank 1. Same idea as P0135.
Common causes for your Mercedes-Benz
- Failed downstream O2 sensor
- Wiring issue
Symptoms
- Check Engine Light
Typical fixes
- Replace bank 1 sensor 2 O2 sensor
- Repair wiring
Repair cost range
For a Mercedes-Benz, repairs for P0141 often fall between $80 and $300, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.