1998 Ford Contour E CHECK FAILURE O2 SENSORS

bud236 · Posted at Thu Jun 19, 2008 5:15 pm

1998 Ford Contour 6 cyl 128000 miles
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MY SONS CAR DID NOT PASS OUR E CHECK, WE HAVE CHANGED THE O2 SENSORS(BOTH)AND THE CHECK ENGINE LIGHT IS STILL ON. E CHECK CODE WAS 1131 O2 SENSOR LEAN. DOES DISCONECTING BATTERY RESET COMPUTER CODES IN CAR,WE DID THIS AND CHECK ENGINE LIGHT WENT OFF BUT CAME BACK ON. ALSO CAR MAKES A NOISE LIKE A FOG HORN WHEN RUNNING. I THINK THEY SAW US COMING WHEN I BOUGHT THIS CAR. ANY IDEAS HE REALLY WANTS TO DRIVE AND WE NEED IT TO PASS E CHECK. THANKS FROM A FRUSTERATED MOM

Advertisment · Posted at Thu Jun 19, 2008 5:15 pm

BMRFIXIT · Posted at Thu Jun 19, 2008 5:47 pm

Possible cause are
1. fuel system malfunction
2. egr system malfunction
3. air intake or vacuum leak
4. engine oil level too high
5. incorrect cam timing
6. restricted air filter
7. faulty PCV valve
8. excessive internal engine wear

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