KlaroP0030
MODERATEHO2S Heater Control Circuit (Bank 1 Sensor 1)
What this code means
HO2S Heater Control Circuit (Bank 1 Sensor 1). This family covers the measurement of incoming air and injected fuel, together with the emission devices attached to them. A fault here distorts the mixture the engine burns, which costs fuel and raises emissions.
How to read this code
- PPowertrain
- 0standardised code
- 0Fuel and air metering, auxiliary emission controls
- 30P0030
The letter P names the system: Powertrain. The digit 0 that follows marks a standardised code, shared by all manufacturers code. The next digit, 0, locates the fault: fuel and air metering, auxiliary emission controls.
What to do
Have it checked this week. The car remains usable, but the fault will not clear itself and will fail the roadworthiness test.
Clearing a code switches the light off but repairs nothing: if the fault remains, the code comes back.
Nearby codes
- P0031HO2S Heater Control Circuit Low (Bank 1 Sensor 1)
- P0032HO2S Heater Control Circuit High (Bank 1 Sensor 1)
- P0033Turbo Charger Bypass Valve Control Circuit
- P0034Turbo Charger Bypass Valve Control Circuit Low
- P0035Turbo Charger Bypass Valve Control Circuit High
- P0036HO2S Heater Control C ircuit (Bank 1 Sensor 2)
- P0037HO2S Heater Control Circuit Low (Bank 1 Sensor 2)
- P0038HO2S Heater Control Circuit High (Bank 1 Sensor 2)