What does code P0141 mean on a Smart and is it safe to drive?
P0141: O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2). Here's what it means on your Smart, 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 Smart
- 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 Smart, 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.