CEL comes on after 5min driving, 02 sensor fault code

Peterdroy66

Registered User
My check engine light comes on after driving for SEVERAL minutes and then stays on.
Goes off with a restart then comes back in a few minutes.

Reading codes shows - I think I recall - 92 (this is a 90' so it is a two digit) , effectively it is saying Hego (drivers side) not switching....

As owner before me - new 02 did not resolve the problem.

Anyone seen this, I have not yet delved into it but my initial thought is that the heater is not being powered maybe.
Can't remember if the 02 sensor heaters are fused or not.

I will be getting diagrams out to check my wire colors for it and check through the engine harness connectors, but I just thought I would post here in the meantime for any suggestions from anyone else who's been through this before.....

PR
 
Good evening

Which side? Bank 1 or bank 2. I would check the following:


- Fuel pressure. Fuel filter.

- Vacuum leaks especially the PCV components (PCV to valve cover, intake tube at 6 o'clock position and or the "Y" metal tube at the back of the inlet plenum).

- Exhaust manifold and or gasket leak, EGR (if equipped) tube and or bellows for cracking.

- MAF sensor. Cleaning and or replacement.

- Spark plug(s) and wire(s).

- Coolant leak.



Good Luck.
 
Back
Top