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Does my 2013 Holden Cruze have a transmission control unit issue?

Asked by Thevinda

I have a 2013 Holden Cruze. I recently replaced the ignition coil and spark plugs and a week after the replacement I got another problem. After about 20 minutes of driving, and when the car is brought to a stop at a red light, the car jerks in two-second intervals. This happens only when the gearbox is in Drive and the car is stopped, not while moving. This is the only problem with the car at the moment. I asked an expert and he said it could be an issue with the transmission control unit. Could this be the case? Would love to know your opinion on this.

Answered by CarsGuide

13 Jan 2022 David Morley

Yes, it could be something to do with the way the transmission is behaving. But it could also very easily be any one of a hundred other things. A faulty transmission can cause a car to surge while stopped, but so can a fault with the fuel, ignition and any number other systems found on a modern car.

But work backwards for a moment. Did this new problem occur immediately after the plugs and coil-packs were changed? Or was there a full week of normal driving before the new problem set in? I’d be checking the connections on those new plugs and coils and making sure that nothing has been left loose. A poor earth connection can be the source of many problems that seem like something else initially. From there, I think an electronic scan is probably the best advice as this will help pin-point what’s going wrong. The car’s own computer should have a very good idea of what’s amiss and can alert you to it quickly.

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