Clio 172 with P0136 and P0300 codes.

[Techie88]

Evening guys, got an issue with my car.

As the title says I have both P0136 (o2 sensor circuit malfunction, bank 1 sensor 2) and P0300 (random/multiple cylinder misfire detected) codes showing on my car and I can clear them but both return immediately. It has a slightly rough idle but runs fine other than that.

I have changed the plugs and checked for the misfire by pulling the plugs off the injectors one by one, all of which make the rough idle worse.

Today I have changed the o2 sensor and the problem still persists. It's not a major issue but I don't like the EML being on.

All help and advice is appreciated

 

[iMZee]

I also have this issue too, try changing the coils, if that doesn't work the crank sensor could be bad

 

[Techie88]

This is an old thread I posted mate, turned out it was a dodgy injector, runs sweet as a nut now. Hope this helps you.