help with codes

[jsj123]

Car started missing again, like at 40 in 4th, won't accelerate well, feels like it is running lean and the gas mileage is down 5-7 mpg. In the past month I replaced both oxy sensors and the coolant temp sensor.

Now I get for codes:

12
42
41
66


with the engine off

With it on I get
77
24

The 77 claims I did not goose it, but I did. Does this feel like I need to replace the MAF?

--Stephen

 

[projectSHO89]

Look up each individual code in the FAQs at www.shotimes.com and provide the code defintions also.

Steve

 

[SASHO91]

clear the codes and run the car again, then pull the codes again...

12- IAC problem (clean it)
41-possibly stored
42-same

like i said, clear the codes, and start over.
also,
how old is the fuel filter?
fuel pump?
plugs?
wires?

 

[jsj123]

Thanks for the help. I cleared the codes and the car runs much better. I will check codes again after I come home from work tomorrow.

I did not clear the codes after I replaced the oxy sensors and coolant temp sensor, I assumed the computer would see that the parts were now good.

fuel filter - less than 3 months
plugs/wires - don't know, but 60k was done about 50k ago
fuel pump - don't know

--Stephen

 

[SASHO91]

even when parts are replaced (due to a CEL ) the code is still stored until its erased.