Should I be worried about error code P1420
Thiis is the secondary air valve control circuit electrical. Anyone have any ideas on how to fix this or if it's a problem I should be concerned with?
I also got an error as P1384 which is "knock Sensor 3 Circuit" which appears to be as the description says the system is sensing engine knock or is the sensor not functioning and that is the problem. As I don't hear any type of knocking in the engine which runs very smooth (99' 540i with 130k).
The CEL came on with the onset of really cold weather -40F at the same time power steering fluid began leaking and air lock appeared in rad (fixed the coolant problem and topped up the PS fluid pending warmer temps to fix the hoses)
1999 BMW 540i 6 spd
Last edited by wayned; 02-11-2010 at 07:53 AM.