Engine check light

Engine check light

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Dr Jekyll

Original Poster:

23,820 posts

262 months

Tuesday 3rd November 2020
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A friend of mine has the engine check light come on in his petrol XE. No other apparent problem except he reckons the idle is a bit rough. Handbook says get it looked at ASAP, it was in for service today so he mentioned the problem. He got a call 5 hours later to say 'your engine light is on, if you want us to diagnose it it's £180 and we can fit you in in 3 weeks time'.

Quite apart from the ludicrous lead time, I thought the whole point of modern diagnostics was that the error could be narrowed down pretty easily. Is he supposed to not drive it for 3 weeks? For a car with less than 30,000 miles this seems pretty alarming.

Any suggestions as to what the diagnosis might be?

Dr Jekyll

Original Poster:

23,820 posts

262 months

Friday 20th November 2020
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John Locke said:
If your friend is anywhere near me (20 miles South of Norwich), PM me; I will happily connect him to my system for free. A diagnosis takes no longer than opening Windows and making a few mouse clicks.
Thanks for the offer but he's near Slough. When I last spoke on the subject he mentioned he'd borrowed an OBD reader that cam up with a code to do with the throttle body not controlling idling speeds. Seemed to be a symptom rather than a diagnosis, so not sure whether it's the throttle body itself that's faulty or a sensor somewhere.

Anyhow he reset it and at the time of speaking to him it the light hasn't come back on.

Dr Jekyll

Original Poster:

23,820 posts

262 months

Saturday 28th November 2020
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Latest update.

Engine light came back on, it went into a different Jaguar dealer who did a 'smoke test'(?) and couldn't find the problem but reported that on resetting the light it didn't come back on. Needless to say a day later it did come back on. He reckons they are stringing him along until it's out of warranty.

Dr Jekyll

Original Poster:

23,820 posts

262 months

Sunday 29th November 2020
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lexusboy said:
Smoke test is what is used to detect any air leaks in the engine inlet or vacuum pipe systems.

Does he have a report and all the codes present in the PCM?
Nothing written down apparently, they just verbally confirmed the codes he already knew about.

Dr Jekyll

Original Poster:

23,820 posts

262 months

Thursday 17th December 2020
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Latest update.

He took the car taken back in to the second dealer, booking made at the last visit about 3 weeks ago but this was the earliest they could see it. He'd been warned there was a possibility they'd have to keep it another day if parts were required.

Dropped it off at 8:00. By mid afternoon there had been no phone call either way, he tried to ring the service dept twice but they were too busy to speak to him, each time the receptionist took his details and said someone would call him back.

Turned up just before closing time to see if it was ready, a 25 minute journey which would have been wasted if they were still working on it but clearly no other way to find out what was happening. They hadn't even started to work on the car. He retrieved it and drove home vowing never to return.


Dr Jekyll

Original Poster:

23,820 posts

262 months

Saturday 23rd January 2021
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Good news.

He took the car to Chiltern Jaguar who both diagnosed the issue and fixed it, finished by lunchtime for < £100.