i30 Owners Club

GOT PROBLEMS OR ISSUES? => DIESEL => Topic started by: Dadsracing on May 09, 2021, 17:29:01

Title: i30 CDI 2015 post cat sensor
Post by: Dadsracing on May 09, 2021, 17:29:01

Hi, I have a 2015 1.6 CDI i30 that is showing an engine management light fault. I can turn the mil light off but not sure of the fault.
The live data is showing the pre cat sensor senson 1 swithhing but the post cat sensor 2 is staying at 1.04v even when the engine rpm is increased?
Do I replace the sensor? not been under the car to locate it yet. or do I gust keep clearing the fault?
Car starts normal, no driveability problems, no change in MPG.
Fault code is P2271
Thanks.

Title: Re: i30 CDI 2015 post cat sensor
Post by: Pnut on May 10, 2021, 03:27:52

Aunty google says:
Possible causes P2271, P2273 code
- Exhaust system leak
- O2 sensor signal circuit
- O2 sensor return circuit
- O2 sensor

It is apparently the downstream o2 sensor reading rich, so could be electrical issue or most likely the sensor is poked. Usually the pre cat sensor reads the fuel trims and ecu adjusts accordingly, post cat reads the condition of the cat. So driving shouldnt be affected unless the cat is blocked or not working