2014 Mitsubishi P0135: What It Means & Is It Safe to Drive?
P0135 on the 2014 Mitsubishi: O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1). Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
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What this code means
The heater circuit for the upstream O2 sensor on bank 1 has a fault. Sensor may still work but take longer to go closed-loop.
Common causes on the 2014 Mitsubishi
- Failed O2 sensor (heater element)
- Open or short in heater wiring
Symptoms
- Check Engine Light
- Possible slightly worse fuel economy
Typical fixes
- Replace bank 1 sensor 1 O2 sensor
- Repair wiring
Repair cost range
For a 2014 Mitsubishi, repairs for P0135 typically fall between $80 and $300, depending on the root cause and labor rates in your area.