LLOYDDROSS

Our 2002 Cayman did the same thing. Occasionally the engine warning light illuminated. Finally did get a scan that showed the warning was connected to the barometric air pressure sensor, or the wiring, etc attached to that sensor. Could never get the issue resolved. A diesel engine needs 4 things to operate for a very long time. Clean unrestricted air flow through the air intake and the radiator cooling system , clean unrestricted fuel flow, adequate level of lubricating oil, and adequate level of coolant. I panicked several times then manually checked the 4 above criteria and ignored the light. Drove it for many miles and slept like a babe in it.