Code 1131
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Code 1131
I have a 98 Expedition 4x4 with the 5.4 and 107,000.
The CEL came on yesterday morning as I was driving my daughter to school. It was very cold outside and when I started it, there was a strange whine coming from the engine. Almost sounded like the train whistle on a kids railroad set. As I pulled away, the nengine seemed to be laboring a bit, but again, it was below freezing and I did not let it warm up at all. Then the CEL like came on.
Took it to AutoZone this morning and they pulled the code 1131, which they tell me is the O2 sensor.
Last week I had my mechanic replace the right side manifold gasket as it was leaking. A labor intensive and expensive job to say the least. Could my CEL O2 sensor issue be related to the manifold work? Or is this just a coincidence?
Any idea if this requires some sort of simple cleaning or a full replacement of the sensor?
The CEL came on yesterday morning as I was driving my daughter to school. It was very cold outside and when I started it, there was a strange whine coming from the engine. Almost sounded like the train whistle on a kids railroad set. As I pulled away, the nengine seemed to be laboring a bit, but again, it was below freezing and I did not let it warm up at all. Then the CEL like came on.
Took it to AutoZone this morning and they pulled the code 1131, which they tell me is the O2 sensor.
Last week I had my mechanic replace the right side manifold gasket as it was leaking. A labor intensive and expensive job to say the least. Could my CEL O2 sensor issue be related to the manifold work? Or is this just a coincidence?
Any idea if this requires some sort of simple cleaning or a full replacement of the sensor?
Lead Driver
Joined: Sep 2006
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This code is the Ox sensor on the drivers side.
Cold temps can elicit all kinds of noises in an older vehichle.
The use of lubes and loosening agents can contaminate Ox sensors especially ones that have age on them already.
Cold temps can elicit all kinds of noises in an older vehichle.
The use of lubes and loosening agents can contaminate Ox sensors especially ones that have age on them already.
Last edited by Bluegrass 7; Dec 9, 2006 at 01:15 PM.
Hotshot
Joined: Jan 2004
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From: St Louis
Correction: P1131 is bank 1 which is the PASSENGER side, not the driver's side.
If this is the same side that just had the manifold gasket replaced, then the fault code very well could be related to the recent work. Any exhaust leak upstream of the sensor will introduce fresh air into the exhaust stream and will cause a faulty reading.
Steve
If this is the same side that just had the manifold gasket replaced, then the fault code very well could be related to the recent work. Any exhaust leak upstream of the sensor will introduce fresh air into the exhaust stream and will cause a faulty reading.
Steve
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Originally Posted by projectSHO89
Correction: P1131 is bank 1 which is the PASSENGER side, not the driver's side.
If this is the same side that just had the manifold gasket replaced, then the fault code very well could be related to the recent work. Any exhaust leak upstream of the sensor will introduce fresh air into the exhaust stream and will cause a faulty reading.
Steve
If this is the same side that just had the manifold gasket replaced, then the fault code very well could be related to the recent work. Any exhaust leak upstream of the sensor will introduce fresh air into the exhaust stream and will cause a faulty reading.
Steve
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Joined: Nov 2001
Posts: 892
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From: Duluth, MN
Depending on the reason for the code being set, you might not have a bad sensor. You need to know why the code was set. Lean condition? Rich condition? O2 Heater fault? If that gasket is leaking, it could set a lean condition and set the code.
