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Author Z20let diagnosis..
Sly_SRi
Premium Member

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Registered: 9th Apr 04
Location: Reading, UK Drives: Corsa C
User status: Offline
14th Apr 13 at 16:50   View Garage View User's Profile U2U Member Reply With Quote
So I'll keep this brief, I have a EM fault that keeps returning. Car is a Corsa C with Z20let.

The fault throws the Ecu into limp home mode and remains like that until you switch the engine off. It occurs under slow driving conditions, I.e. driving around town. If I drive fairly quick then it is less likely to happen.

I have a code reader and I've read the fault codes which are:

P1120, P1122 & P0650

Having done lots of research I then changed the pedal and the throttle body.

The fault is still there.

So what else can it possibly be?

Thanks in advance

Corsa C Z20Let

Black Sleeper Turbo Project
Dan
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Registered: 22nd Apr 02
Location: Gorleston on Sea, Norfolk
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14th Apr 13 at 17:00   View Garage View User's Profile U2U Member Reply With Quote
What code reader? I have a standard obd2 one which read my vectra codes. Said it had a completely different fault to my opcom.

Just something to think about if your using a basic reader

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Sly_SRi
Premium Member

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Registered: 9th Apr 04
Location: Reading, UK Drives: Corsa C
User status: Offline
14th Apr 13 at 17:40   View Garage View User's Profile U2U Member Reply With Quote
Well in actual fact I used the pedal test to get the codes, I use the code reader just to clear the Em light and clear the codes to help the diagnose process...

Is there anything else that it could be other than the tb & pedal?

Corsa C Z20Let

Black Sleeper Turbo Project
monkeytwizzel
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Registered: 10th Aug 11
Location: Chard, Somerset
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15th Apr 13 at 21:11   View User's Profile U2U Member Reply With Quote
What are the faults that the codes relate to?just bare in mind that some faults only exist because of other faults ie lambda fault can show when a crankshaft sensor fails only because of unburnt fuel so use logic
corsadonk
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Registered: 4th Jul 09
Location: Marlborough, Wiltshire
User status: Offline
21st Apr 13 at 09:11   View Garage View User's Profile U2U Member Reply With Quote
What do the codes mean?

I've heard of the actuators overboosting, making it go into safe mode.

 
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