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Assuming no issues with RF grounding and no RF getting into the wiring (have you tried choking the power cables to the amp??) then it may just be a case that the electronics in the vehicle aren't shielded well against RF so exceed a certain power and you'll have issues. It could be that you're unlucky enough to have a length of cable in the wiring loom between devices that makes it a great antenna for 27MHz. You may need to start going round the wiring throwing clip on Mix31 or Mix43 ferrites. I'd certainly throw one on the wiring to the throttle body, ideally seeing if you can get a turn or two through the ferrite, assuming that's what is throwing up the fault code.

[QUOTE="M0GVZ, post: 707597, member: 22312"] Assuming no issues with RF grounding and no RF getting into the wiring (have you tried choking the power cables to the amp??) then it may just be a case that the electronics in the vehicle aren't shielded well against RF so exceed a certain power and you'll have issues. It could be that you're unlucky enough to have a length of cable in the wiring loom between devices that makes it a great antenna for 27MHz. You may need to start going round the wiring throwing clip on Mix31 or Mix43 ferrites. I'd certainly throw one on the wiring to the throttle body, ideally seeing if you can get a turn or two through the ferrite, assuming that's what is throwing up the fault code. [/QUOTE]

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