Toyota 100 series and DP Chip problems

Submitted: Thursday, Apr 01, 2021 at 21:21
ThreadID: 141329 Views:11131 Replies:3 FollowUps:5
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I have a intermittent problem , five times in 10,000 Kms the cars engine management light comes on and a couple of kms later the car goes into limp home mode. The problem only has occurred when towing a 2.5 ton caravan and driving uphill, usually in 4th dear ( its a 5 speed auto ) its a 2006 1HD FTE 230,000 km
I turn the engine off and 10 minutes later all is good. My mechanic said it is a throttle body error code, which lots of things can cause. He could find no hose or wiring issues .He suggested removing the DP Chip when it next occurred, I did that on the next occasion and retackled the same hills . No problem. Put the DP chip back in and drove the same hills slowing down to 40km then flattening it in 3rd gear to 3500 RPM . Of course the problem didn't reoccur.
I consider it is not a heat or vibration issue as all occurances have being on the bitumen not offroad.
So I would like to know if anyone else has had similar issue with the DP chip or any other ideas
of possible cause?
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