Howdy group,
Trying to troubleshoot a Prado 120 V6 engine check engine light issue.
The engine seems to be idling slightly lumpy, as if as one of the 6 cylinders is not firing. Starts up fine, no issue with cranking battery but can feel a slight tremor throughout the vehicle.
The amber CEL light is on solid, as well as the two traction control lights next to this warning light.
Using a Scangauge II, I am able to clear the CEL light whilst the engine is running, but a couple of seconds later the CEL light reappears, followed by the traction control lights.
A scan of the computer with the SGII reveals only one error log in the ECU - a P0351 error code. I believe this translates to ignition coil "A", whatever that means.
Has anyone seen this problem before. I have unplugged the wiring loom that connects to cylinder 1, checked that it's clean and refitted it back snugly. I believe cylinder 1 is the first cylinder nearest to the engine air cleaner box release latches.
Any help would be greatly appreciated. It could well be a faulty ignition coil but instead of replacing parts, if there's a way of diagnosing the problem better, I'd like to find out how.
Vehicle has around 180,000 kms on it, and has never been offroaded. All highway driving. Sequential LPG fitted 4 years ago, but the lumpy idle occurs irrespective of whether running on petrol or LPG, so I am presuming that the fuelling system is OK.
Trying to troubleshoot a Prado 120 V6 engine check engine light issue.
The engine seems to be idling slightly lumpy, as if as one of the 6 cylinders is not firing. Starts up fine, no issue with cranking battery but can feel a slight tremor throughout the vehicle.
The amber CEL light is on solid, as well as the two traction control lights next to this warning light.
Using a Scangauge II, I am able to clear the CEL light whilst the engine is running, but a couple of seconds later the CEL light reappears, followed by the traction control lights.
A scan of the computer with the SGII reveals only one error log in the ECU - a P0351 error code. I believe this translates to ignition coil "A", whatever that means.
Has anyone seen this problem before. I have unplugged the wiring loom that connects to cylinder 1, checked that it's clean and refitted it back snugly. I believe cylinder 1 is the first cylinder nearest to the engine air cleaner box release latches.
Any help would be greatly appreciated. It could well be a faulty ignition coil but instead of replacing parts, if there's a way of diagnosing the problem better, I'd like to find out how.
Vehicle has around 180,000 kms on it, and has never been offroaded. All highway driving. Sequential LPG fitted 4 years ago, but the lumpy idle occurs irrespective of whether running on petrol or LPG, so I am presuming that the fuelling system is OK.
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