Quote:
Originally Posted by blue62
Codes like the ones your getting are not immediately harmful to the cats.
So the first time an event happens that can trigger the codes.
The ECU stores the codes in it's memory (pending codes).
If the same type of event occurs on two back to back drive cycles the ECU moves the codes to permanent and turns your check engine light on.
If you have pending or permanent codes your I/M readiness monitors associated with the codes will not reset.
The codes your getting are indicating an overly rich fuel/air mixture
The voltage readings on the O2 sensors are confirming the codes.
Do you have a stock air filter?
Or after market?
Is it Clean?
You could try cleaning the MAF sensor with a spray MAF cleaner. Cheap easy first step.
What year is the car?
How many miles on it?
Have you done any recent work on it?
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Yeah I didn't think the monitors would reset if I have an associated code with it. :/
I believe so, I just bought the car and the prev. owner did a recent engine swap 100k miles. I doubt he wouldn't put a new air filter in - but I will have to check, the cabin air filter looked new.
MAF sensor is a few months old - prev. owner replaced it.
Car is 2001, boxtser 986S.
213K on the odometer, 100K on the engine.
I've recently taken the seat out to look at the alarm system, and have installed new hood struts but that is all. I have attempted to remove the O2 sensors for cleaning but it is seized in there.