P0155
Low severityO2 Sensor Heater Circuit (Bank 2, Sensor 1)
Quick answer
P0155 (O2 Sensor Heater Circuit (Bank 2, Sensor 1)) means: The heater in the upstream O2 sensor on bank 2 isn't working. Not urgent, but affects emissions and economy. Typical Malaysia repair cost: RM80–RM300 (approximate).
Symptoms
- •Check engine light
- •Slightly worse fuel economy
Likely causes
- •Failed oxygen sensor
- •Wiring/connector fault
- •Exhaust leak
Can I drive?
Not urgent, but affects emissions and economy.
Estimated repair cost (Malaysia)
RM80–RM300 (approximate)
This is general information, not a diagnosis. AutoMalaya OBD helps explain your car’s actual scan data; a qualified mechanic may still need to inspect the vehicle.