Vauxhall Corsa 1.3CDTi - Corsa won't rev over 1500rpm

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Thu 17 Oct 2019 21:21
Vauxhall Corsa 1.3CDTi - Corsa won't rev over 1500rpm - Ph1lGg@#£_&-

My 2007 Corsa has the engine fault light on and the engine will not rev over 1500 rpm. I have connected an ODB2 reader and it says no codes.

There are no issues like rough running or smoke. This happened about 2 years ago and the AA thought it might be the throttle potentiometer and sprayed with switch cleaner. After a couple of days the fault cleared and hasn't happened until today.

There are 3 variations of the fault.

1 as described above revs limited to 1500 and fault light on

2 fault light on but revs ok

3 no fault and engine normal

It is possible to rev slowly and the revs go up beyond 1500 but if you stamp down suddenly revs lock onto 1500.

Any ideas?

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Thu 17 Oct 2019 22:31
Vauxhall Corsa 1.3CDTi - Corsa won't rev over 1500rpm - elekie&a/c doctor
If the engine fault light is on , then there should be a code stored . A lot of the cheapo scanners are not very good on Diesel engine motors .
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Tue 22 Oct 2019 13:14
Vauxhall Corsa 1.3CDTi - Corsa won't rev over 1500rpm - Ph1lGg@#£_&-

Well took it to a vauxhall specialist (ex dealer) who couldn't read any codes either but determined that the fault was a soaking wet ECU. I believe this is a common problem due to poor positioning under the front scuttle and when the drain holes block the whole area fills with water. Luckily they were able to dry it out and clean it up, unblock the holes and all ok for now. Surprised no codes stored though.

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