HO2S Heater Control Circuit Bank 1 Sensor 1
The engine computer has found a problem in the heater circuit for the upstream oxygen sensor on bank 1. The sensor heater may not be getting power, ground, or the sensor itself may be bad. This can cause poor fuel control, a check engine light, and slower sensor response.
The vehicle usually can be driven for a short time, but fuel economy and emissions may suffer. If the engine runs rough, stalls, or other warning lights appear, diagnose it soon.
P0030 means the powertrain control module detected an electrical fault in the heater circuit for the Bank 1 Sensor 1 heated oxygen sensor. This is the upstream O2 sensor before the catalytic converter on the side of the engine with cylinder 1. The fault may be caused by an open circuit, short circuit, blown fuse, damaged wiring, corrosion, or a failed sensor heater element.
It is the upstream oxygen sensor on the side of the engine with cylinder 1, located before the catalytic converter.
Yes. If the heater does not work, the engine may stay in open loop longer and use more fuel.
No. Wiring damage, fuse problems, or a bad relay can also cause this code.
No. P0030 is a heater circuit fault, not a sensor signal or mixture performance fault.