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Endurance Racer · 10-19-2022, 06:49 AM

I've been battling a P0336 code. RPM Circuit error.
Its kept me from 2 race events.

This is a 2003 2.7L 3 chain engine

I have verified the mechanical timing with the cam timing tool - The cams and crank are properly in sync.
The crank sensor is good. And a second sensor was tried and tested.
The wiring harness from sensor to DME is good
I can see engine RPM on the scan tool.

per Porsche diagnostics.
The DME (ECM) is bad.

Does anyone have a DME for a 2003 manual trans Boxster I could try to test?
Or a good source for the DME to purchase used?

10-19-2022, 06:49 AM	#39
Endurance Racer Registered User Join Date: Nov 2021 Location: Webster NY Posts: 69	I've been battling a P0336 code. RPM Circuit error. Its kept me from 2 race events. This is a 2003 2.7L 3 chain engine I have verified the mechanical timing with the cam timing tool - The cams and crank are properly in sync. The crank sensor is good. And a second sensor was tried and tested. The wiring harness from sensor to DME is good I can see engine RPM on the scan tool. per Porsche diagnostics. The DME (ECM) is bad. Does anyone have a DME for a 2003 manual trans Boxster I could try to test? Or a good source for the DME to purchase used?