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1995-2002 Range Rover P38A
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Hi

My Check Engine light keeps coming on and the code P1137 keeps showing when I read codes. The is confusing as if should be the downstream Bank A HO2S sensor but my UK spec car does not have one.

Any ideas?

I am also having poor idle problems on LPG and a high idle when the vehicle in cold. I can't find any air leaks.

RR 4.0SE Auto LPG rebuilt engine with top hat liners and Mark Adams chip set.
 

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If I am reading the Land Rover codes correctly the 1137 code is bank specific for running rich on bank A, but is not upstream or downstream specific.
 

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What gas system are you running?
Have you tried clearing the code and then running on petrol only and then rechecking for code to see if it is petrol side of things or lpg?
Does your code reader read live sensor data and if so have you read this for the O2 sensors whilst on petrol and lpg?
You could also swap O2 sensors over and see if code follows them which would suggest sensor itself is faulty.
 

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rrtoadhall said:
If I am reading the Land Rover codes correctly the 1137 code is bank specific for running rich on bank A, but is not upstream or downstream specific.
From Rave - P1137 Oxygen sensor problem with switching rich, sensor(s) for Bank A - which I understood to mean the opposite to running rich (that is code P0172). In other words that sensor is not getting switched to a full rich position such as when accelerating hard. So either a sensor problem or fuelling for that bank not adequate, or gas system could be messing with adaptive values or if using emulation the outputted emulation signal often never gives a full rich signal again confusing the system.
 

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I was getting that code. Forget about the o2 sensors for now. Buy the special screw driver, take out your MAF, don't touch it with your fingers, but clean it with some cleaner fluid, change your air filter. Then erase the code to see if it comes back, see if that works. Hopefully your MAF is just dirty like mine was. If it is faulty, you have to buy another one.
 
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