This one's got me baffled. The car is new to me. Bought without an MOT so I brought it home on a transporter. EPS light wasn't on when I bought it, nor when I loaded and unloaded it from the trailer. Following day, the EPS light comes on.
There are no fault codes (except for the Rain Light Sensor in the RLS and a the front axle load sensor for the xenons in the ALZ). I have no other warning lights and the power steering functions normally, at least as far as I can tell moving it around on the drive.
One thing that occurs to me is, after I got it home, I spent half a day thoroughly checking it over, including washing all the (hopefully) old oil off the bottom of the block to see if it returns. I disconnected the battery whilst doing that, lest water short circuited anything, and let the car dry before reconnecting. I think it was the next start up that the EPS light came on. That may or may not be related, but I'm keeping it in mind.
I'm also keeping in mind that, when I viewed it, there were a dozen random fault codes, including three for the EPS. I knew though that he'd let the battery go flat through leaving it standing and that very low voltages cause spurious errors, so I deleted them all when I picked it up to see what came back. Stupidly I didn't take a screenshot because I thought i could go back in ISTA to see what they were, should I need to, but I can't see that session. I do think one of the three might have been the steering angle sensor. The EPS light wasn't lit though.
I've fully charged the new battery as a starting point. Still only the RLS and ALZ codes.
I went into INPA to look at the analogue status for the steering angle sensor and saw this, with the steering straight ahead:
And turning the wheel caused the measured angle to jump all over the place. OK, I thought, my steering angle sensor is faulty. Went back inside to search the forums and found @bigwinn's thread on how to reinitialise using the "developer only" option in INPA. So went back out to try that first.
Went to the the same screen. Only this time, before I'd done anything, it was showing normally
And turning the wheel lock to lock had the measured angle moving in response as you'd expect.
But the light was still lit.
I did still reinitialise it, just in case, but nothing changed.
So it seems nothing's wrong but the light won't go away.
Maybe I just need to drive it but I can't drive it without an MOT except to get the MOT or to a garage, and it won't pass an MOT with the light on. And I don't really want to pay a garage to tell me they can't find anything wrong with it and/or I should pay them to replace everything and maybe it'll go away.
Any ideas? Every old thread I'm finding on the EPS light has ABS and DSC (I think) warning lights on as well, and/or non-functioning power steering.
There are no fault codes (except for the Rain Light Sensor in the RLS and a the front axle load sensor for the xenons in the ALZ). I have no other warning lights and the power steering functions normally, at least as far as I can tell moving it around on the drive.
One thing that occurs to me is, after I got it home, I spent half a day thoroughly checking it over, including washing all the (hopefully) old oil off the bottom of the block to see if it returns. I disconnected the battery whilst doing that, lest water short circuited anything, and let the car dry before reconnecting. I think it was the next start up that the EPS light came on. That may or may not be related, but I'm keeping it in mind.
I'm also keeping in mind that, when I viewed it, there were a dozen random fault codes, including three for the EPS. I knew though that he'd let the battery go flat through leaving it standing and that very low voltages cause spurious errors, so I deleted them all when I picked it up to see what came back. Stupidly I didn't take a screenshot because I thought i could go back in ISTA to see what they were, should I need to, but I can't see that session. I do think one of the three might have been the steering angle sensor. The EPS light wasn't lit though.
I've fully charged the new battery as a starting point. Still only the RLS and ALZ codes.
I went into INPA to look at the analogue status for the steering angle sensor and saw this, with the steering straight ahead:
And turning the wheel caused the measured angle to jump all over the place. OK, I thought, my steering angle sensor is faulty. Went back inside to search the forums and found @bigwinn's thread on how to reinitialise using the "developer only" option in INPA. So went back out to try that first.
Went to the the same screen. Only this time, before I'd done anything, it was showing normally
And turning the wheel lock to lock had the measured angle moving in response as you'd expect.
But the light was still lit.
I did still reinitialise it, just in case, but nothing changed.
So it seems nothing's wrong but the light won't go away.
Maybe I just need to drive it but I can't drive it without an MOT except to get the MOT or to a garage, and it won't pass an MOT with the light on. And I don't really want to pay a garage to tell me they can't find anything wrong with it and/or I should pay them to replace everything and maybe it'll go away.
Any ideas? Every old thread I'm finding on the EPS light has ABS and DSC (I think) warning lights on as well, and/or non-functioning power steering.
