P0141 Oxygen sensor after the converter - heater circuit (bank 1, sensor 2)
P0141 means the engine control unit has detected a fault in the heater circuit of the oxygen sensor after the converter (bank 1, sensor 2). The heater lets the sensor warm up quickly to operating temperature. The fault is in the sensor or its heater circuit (fuse, relay, wiring) - the converter is not to blame here, and restoring it will not fix the code.
Does restoration help?
Most likely not the catalytic converter
Most likely not: the code points to the sensor or its circuit, not to the converter, and restoring the converter will not fix this fault. If P0420 or P0430 is present as well, we assess the converter only once the sensor and its circuit are in order.
A code shows where to look, but it is not a final diagnosis. We make the decision at the workshop after diagnostics and measurement.
Symptoms
- Check Engine light on; the car usually drives as before.
- As long as the sensor is not working properly, the control unit cannot correctly assess how the converter is working.
- The code soon comes back after clearing until the cause is fixed.
Most common causes
- A burnt-out sensor heater element.
- A fuse or relay.
- Damaged wiring or connector.
Order of checks
What to do
- 1
Read the codes and data
During the computer diagnostic we look at all the codes and the live sensor signal to find out whether the fault is in the sensor, its circuit or somewhere else.
- 2
Check the circuit
Wiring, connector, fuse and heater circuit - the fault may be there rather than in the sensor itself.
- 3
Then the sensor and the converter
If the circuit is in order, the sensor most likely needs replacing. We assess the converter separately - only if P0420 or P0430 is present as well.
FAQ
Questions about P0141
It usually does not affect how the car drives, but without the heater the sensor only starts working after a longer drive. The fault is worth fixing before it starts to interfere with converter monitoring.
The heater is part of the sensor, so if the heater itself has failed, the whole sensor is replaced. The fuse and wiring are checked before that.
P0141
Not sure what is wrong with your car?
Tick the symptoms or enter the fault code - in 30 seconds you get a first assessment of whether the part can be restored. If restoring is no longer worth it, we buy the old converter.
Request
Book a check or a job
Leave your contact details - we will get back to you, clarify the situation and agree on a time.
- Phone+371 29 007 007
- Phone+371 28 777 998
- WhatsApp+371 20 099 444
- Emailinfo@autokatalizatori.lv
- AddressJūrkalnes iela 62, A7 bokss, Rīga
