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Are you having problems with your 2009 Holden Commodore? Let our team of motoring experts keep you up to date with all of the latest 2009 Holden Commodore issues & faults. We have gathered all of the most frequently asked questions and problems relating to the 2009 Holden Commodore in one spot to help you decide if it's a smart buy.
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We haven't had any other reports of this issue, but we have seen reports of the radiator failing. The plastic fitting in the radiator breaks away and you need a new radiator. The problem seems to occur when the car has done around 70,000 to 80,000km. I would be pressing the dealer and Holden for a replacement radiator.
The torque convertor is clearly locking up too early causing the vibration and the best way to fix it is to have the transmission recalibrated as you've been told.
The system is designed to start on petrol every time, whether the switch is set to petrol or LPG, so there should not be any difference in starting. It sounds as though at times it could be trying to start on LPG instead of petrol. You should see an IMPCO specialist to have the ECM checked to make sure it is actually being told to start on petrol.
It's not related to the fuel system as the Impco system starts on petrol every time, whether you've got the system switched to petrol or LPG. It's more likely to be an engine sensor, such as the crank angle sensor, which is playing up intermittently. Check the connections and the sensor itself. As for the warranty, you did the right thing in reporting while the warranty was in effect, so you could have a claim against Holden once the cause of the problem is determined.