How do I manually reset the engine check light on Rover 25?

[taylv001]

Please can somebody help with this simple question,

thanks

[Rover_ron]

Originally Posted by taylv001

Please can somebody help with this simple question,

thanks

Is it a petrol or diesel?

If its petrol, you can use a DIY code reader (laptop also needed) which plugs into the diagnostic socket in the drivers foot well. (£70-90)

Or you can take it to a auto/fuel injection/independent garage or a main dealer. The independents will charge about £20-30, the main dealer about double. Try your yellow pages.

If it is a diesel pre 2004/5 you CANNOT reset the light with any diy diag tools/code readers. (because the ECU requires security access)

[taylv001]

Thanks for that, it's petrol and therefore looks like I'll have to fork out for it, didn't know if there was a procedure for doing so without all the gadgets, (similar to resetting the stepper motor on previous models or something)


Ta

[Rover_ron]

Originally Posted by taylv001

didn't know if there was a procedure for doing so without all the gadgets, (similar to resetting the stepper motor on previous models or something)
Ta

No those days are long gone.
Do you know why the MIL came on in the first place?
The garage will be able to tell you which code (or codes) have been logged which will give you a clue.

[wol6]

if the lamps on then there is a fault
fix the fault then the lamp will go out
do you live in the west midlands???
contact me for more info i you wish
many thanks
wol

[taylv001]

Scenario is:
Lamp came on
Rover dealer diagnosed and said "new MAP sensor needed"
Fitted sensor myself
lamp still on.
Any suggestions?

[cosb6]

It wasn't the MAP sensor that was faulty... would be my suggestion....

[Dave turbo]

Originally Posted by taylv001

Scenario is:
Lamp came on
Rover dealer diagnosed and said "new MAP sensor needed"
Fitted sensor myself
lamp still on.
Any suggestions?

It usually take about 4 days driving to reset.

I had a decat and after 4 days the check light came on, fitted a MIL eliminator (fools the sensor into thinking there is a cat there) and after 4 days again it went out. Not sure if its the amount of times the car is started or days or miles, but definately on mine it seems like 4 days to adjust.

Or you can have it reset by the diagnostic machine.

[Rover_ron]

On the diesels, the MIL will not go out even when the fault is fixed. The throttle position sensor went on my 45TDi, causing limp home mode. (Revs fixed at 1300)
I replaced the sensor, car drove normally, but the MIL remained on for 6 weeks until I had it reset by a independent with an ACR4.

The pre '99 cars would normally only light the MIl whilst the fault was present. Switching the ignition off and on again resets it. These cars are not EOBD compliant.

I believe the later cars are like the L series diesel so the light will never go off of its own accord.
Indeed, the EOBD standard requires it to be manually reset.