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Joined: Apr 2003
Posts: 7
Newbie
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OP
Newbie
Joined: Apr 2003
Posts: 7 |
Hello everyone. I searched through the numerous postings on the P1131 error code, however, didn't see any unique to my situation.
I have a 98 SVT has had the 1131 error code off an on for about a year now. After getting the code scanned at Autozone the first time, the light went out a few days later, so I didn't worry about it. Then about 2 months ago, it came back on again for good. I have replaced the bank 1 upper 02 sensor about two weeks ago with a Bosch OEM sensor. The engine light went off eventually after a couple of "around the town" drives. I then went on a 400+ mile trip and the light stayed off. After returning home, the wife took the car around town, and the light came back on! I haven't verified that the code is an 1131 yet, but I suspect it will be.
My question is, what would cause the 02 sensor to go out so quickly? Thanks for any tips.
Bryan
98 SVT
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Joined: Jul 2002
Posts: 4,714
Scourge of the Master Debaters
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Scourge of the Master Debaters
Joined: Jul 2002
Posts: 4,714 |
How many miles are on the car?
Beer is my Gatorade.
Hooray Beer.
'98 "Sport" Pacific Green
'98 E0 SVT Silver Frost
Pictures
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Joined: Apr 2003
Posts: 7
Newbie
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OP
Newbie
Joined: Apr 2003
Posts: 7 |
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Joined: Jul 2002
Posts: 4,714
Scourge of the Master Debaters
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Scourge of the Master Debaters
Joined: Jul 2002
Posts: 4,714 |
If you do a lot of stop-and-go driving or a lot of idling O2 sensors can fail anywhere from 60000 to 100000 miles. 80000 seems a little early, but driving conditions can play a big role. Short trips that don't let the engine warm up properly can really screw up O2 sensors after a while.
Beer is my Gatorade.
Hooray Beer.
'98 "Sport" Pacific Green
'98 E0 SVT Silver Frost
Pictures
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Joined: Mar 2002
Posts: 2,319
Hard-core CEG'er
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Hard-core CEG'er
Joined: Mar 2002
Posts: 2,319 |
Welcome onboard.
May not have been O2 Sensor then, or now. Unfortunately not all CELs indicate specific component, sometimes just general sub-system function.
From service manual:
Diagnostic Trouble Codes (DTCs) P1131 bank 1 (Cylinder 1) and P1151 bank 2 indicate the fuel/air ratio is correcting rich for an overly lean condition. The HO2S voltage is less than 0.45 volt. DTCs P1132 bank 1 (Cylinder 1) and P1152 bank 2 indicate the fuel/air ratio is correcting lean for an overly rich condition. The HO2S voltage is greater than 0.45 volt.
DTC P1130 and P1150 indicate the fuel control system has reached maximum compensation for a lean or rich condition and the HO2S is not switching.
DTC/HO2S Reference List
-- HO2S-11 = DTCs P1131, P1132 and P1130
-- HO2S-21 = DTCs P1151, P1152 and P1150
Possible causes:
Fuel system
-- Excessive fuel pressure.
-- Leaking fuel injector(s).
-- Leaking fuel pressure regulator.
-- Low fuel pressure or running out of fuel.
-- Contaminated fuel injector(s)
-- Vapor recovery system
Induction system
-- Air leaks after the MAF.
-- Vacuum leaks (vacuum lines and gaskets).
-- Restricted air inlet.
-- PCV system.
-- Improperly seated engine oil dipstick.
EGR System
-- Leaking gasket.
-- Stuck open EGR valve.
-- Leaking diaphragm.
Base engine
-- Oil overfill.
-- Cam timing.
-- Cylinder compression.
-- Exhaust leaks before or near the HO2Ss.
- Check intake air system for leaks, obstructions and damage.
- Check air cleaner element, air cleaner housing for blockage.
- Verify integrity of the PCV system.
- Check for vacuum leaks.
98 Mystique LS v6 atx 163,000km
97 Contour LX v6 atx 163,000km
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