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Topic: Code P1131 (Read 2264 times) |
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Scorpio_Mike
Senior Member
Jeep Grand Cherokee 3.0 V6 & 2.8 Sierra XR4i 4x4
Posts: 2354
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Pegasus kindly did an OBD scan on my 2.3 at the Kent meet today and the only code showing was :
P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1.
Is this anything to be too concerned about ?
What needs fixing ?
Thanks.
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Star sign is Scorpio !
Sierra XR4i's are great...especially when fitted with 4WD 
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Simmo
Administrator
I'm an OAP !
Posts: 5508
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Re: Code P1131
« Reply #1 on: Mar 29th, 2010, 7:22am » |
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Mike, Isn't it the Lamda sensor ??. Has a wire come off??.
This page may help particularly the section headed 'Troubleshooting'.
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tlundkvi
Full Member
Ex. Scorpio 2.9 24V -95
Posts: 909
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Re: Code P1131
« Reply #2 on: Mar 29th, 2010, 2:26pm » |
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It may also be the lambda sensor is just dead. No switching means it just reports a flat value. They're supposed to last 60K, but may last longer. I've seen them on ebay with ford specific plug for around 20 pounds.
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Scorpio_Mike
Senior Member
Jeep Grand Cherokee 3.0 V6 & 2.8 Sierra XR4i 4x4
Posts: 2354
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Re: Code P1131
« Reply #3 on: Mar 29th, 2010, 6:43pm » |
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Cheers guys
Will investigate further and report.
Car has done 144k so maybe sensor has gone kaput 
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Star sign is Scorpio !
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Scorpio_Mike
Senior Member
Jeep Grand Cherokee 3.0 V6 & 2.8 Sierra XR4i 4x4
Posts: 2354
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Re: Code P1131
« Reply #4 on: Mar 29th, 2010, 8:27pm » |
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OK, dumb question time now...
Does a 2.3 16v have 1 or 2 lambda sensors ?
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Tompion
Administrator
1997 2.3 Ultima estate.
Posts: 2918
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Re: Code P1131
« Reply #5 on: Mar 29th, 2010, 8:56pm » |
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Just the pre cat sensor.
According to this site it should be a planar type:
http://www.gendan.co.uk/
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Pegasus
Full Member
24V Cosworth Ultima Born: Sept 97, sold Aug 23
Posts: 741
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Re: Code P1131
« Reply #6 on: Mar 30th, 2010, 8:06pm » |
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Hi Mike,
have a look HERE.
Also the LTFTs were ok on the scan so no faulty FP Reg or leaking vacuum pipes.
The graph of the pre cat sensor showed v slow switching - so may be on way out.
However, the enhanced scan reading 'O2S11_FL' (O2 sensor bank 1 sensor 1 has failure) says "No" Perhaps someone else may have an answer to this
Paul
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