Help Please! - Engine maintenance sensor

[Miss_k]

Hi!

I have an 03 Cooper s with the JCWorks Package.

Recently the emissions sensor light and the Engine Maintenance sensor light have been coming on\ together, reducing the power in the car. I have noticed that if i turn the ignition off and on again, they reset, and just the emissions light remains on, but the power is restored.

I have noticed thta this mainly happens when the fuel tank is full, and around half full.

I took it to a dealer, and they have said it requires a whole new wiring loom.

Has anyone had any similar problems??
Doe anyone have any ideas or possible solutions??! (preferably cheaper ones than the whole wiring loom! )

Grateful for any help whatsoever!!!

[Richard Crofts]

You need to know what fault codes the sensors are throwing up, which then cause the limp home mode to kick in. Try taking it to a MINI specialist with full diagnostics equipment. ThinkMINI have a trained diagnostics ex BMW tech (worcestershire), ModnMINI (kent, maidstone?) have ex BMW techs ... theres also 1320 etc ... they can have a look at the fault codes and see what the ECu thinks is wrong.... BMW may be right but I doubt you really need a full loom.... theres probably an issue and part could be fitted in (BMW wont do this as they deal with stock parts and the loom as a whole part so thats what they fit, even to repair a 2cm section of wire often!)

[C.Noble]

I am afraid I have only come accross this before on Coopers and not Cooper S's and am not sure if the S's suffered the same but on the normal cooper, where the harness goes into the throttle body were bad for breaking (until the modified harness came out in 03 I think!) if it is the same problem, any auto sparky should be able to check/repair the harness for you in under an hour, if you are confident, you could even look yourself, the last one I repaired was really obvious once the conduit was removed.


Hope this helps.