P0030
HO2S Heater Control Circuit (Bank 1 Sensor 1)
P0030 is an OBD-II diagnostic trouble code meaning: HO2S Heater Control Circuit (Bank 1 Sensor 1). Common causes: faulty oxygen sensor, broken or damaged wiring to the sensor. Estimated repair cost: $6–89.
Symptoms
- Check Engine light comes on
- Increased fuel consumption
- Unstable engine operation at idle
- Reduced engine power
- Rough engine operation during cold start
- Increased toxicity of exhaust gases
Causes
- Faulty oxygen sensor
- Broken or damaged wiring to the sensor
- Corrosion of sensor connectors
- Blown heater circuit fuse
- Engine control unit malfunction
- Short circuit in the heater circuit
- Poor contact in the sensor connector
How to Fix
- Connect the diagnostic scanner and read the error codes
- Check the oxygen sensor circuit fuses
- Inspect the sensor wiring for damage
- Check the resistance of the sensor heater (usually 2-14 Ohms)
- Measure the supply voltage at the sensor connector
- Check the integrity of the sensor ground wire
- If necessary, replace the oxygen sensor
- Clean connectors from corrosion and oxides
- Reset error codes and take a test drive
Related codes
Error P0030 by Vehicle Brand
FAQ
What does the P0030 code mean?
P0030 is an OBD-II diagnostic trouble code that indicates: HO2S Heater Control Circuit (Bank 1 Sensor 1)
What causes a P0030 error code?
The most common causes of P0030 include: Faulty oxygen sensor; Broken or damaged wiring to the sensor; Corrosion of sensor connectors; Blown heater circuit fuse.
How do I fix a P0030 diagnostic trouble code?
To fix P0030: Connect the diagnostic scanner and read the error codes. Check the oxygen sensor circuit fuses. Inspect the sensor wiring for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0030?
Limited driving only, diagnose soon
How much does it cost to fix P0030?
The estimated repair cost for P0030 is $6–89. Actual cost depends on your vehicle, location, and labor rates.
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