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1995-2002 Range Rover P38A
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3 Posts
Discussion Starter #1
Can anyone assist me with a plug in reader question.
I only recently bought my 2001 P38 2.5 Diesel and though everything was fine for a day, the engine management light came on and has so far not gone out.
I took it to a reputable LR specialist who plugged in his diagnostic reader but could not get it to read so this is problem number one as He could only assist me by spending possibly hours trying to trace the electrical fault, are there any common faults that are worth trying first?
I have since changed the engine oil, air, oil & fuel filter and added a FORTE fuel additive and injector specific additive to the fuel tank to at least eliminate old oil & mucky fuel as a problem.
My next thought is to remove the battery earth lead & touch it to the positive then re-connect as if to re-boot?
 

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Registered
1995-2002 Range Rover P38A
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450 Posts
try another mechanic or a specific obd reader for a p38 ,could just be dirt or corrosion in the plug. find out why it wont read .
 

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Registered
1995-2002 Range Rover P38A
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758 Posts
Check connectors in the foot wells, if they've had water at any time, you won't get a reading from the obd socket
 

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LEGACY VENDOR
1995-2002 Range Rover P38A
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4,159 Posts
Connections in the OBD port itself are worth checking for sure. Likewise the diagnostics fuse already mentioned.
Power to the OBD socket comes from the underbonnet fuse box on a brown wire, through one of the kick panel connectors in the RH footwell. I've seen a few where this is the problem.

EAS connections to the OBD socket go through the LH footwell connectors, whereas everthing else either goes through the fasica loom of the RH kick panel connectors aswell. The main OBD wires (from memory) are a Light Green/red and a Pink/Red wire.

I power to the socket and the socket pins themselves are OK, then there is a splice in the Light Green/Red wire and Pink/Red wire in the fascia loom, just up in the LH side of the RH footwell. I've seen a few occasions now where the splices have corroded out, as they happen to be in the region where coolant gets in if the heater core, or O-rings have been leaking at some point. The splices are a bit buried in the loom, but if everything else checks out, then it's worth having a look.
 
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