Hello all, we have this Land Rover here that we put a head gasket on it due to oil leakage. get it all back together and the MIL comes on with the above listed codes in the ECM. I replaced the MAP sensor with no change. Have 5volt supply and ground to the sensor. have 2.4 volts on the signal wire with the sensor unplugged. Is that the way it is supposed to be or not? If not, where do i go next? Thanks in advance!!
Key on, Engine off, what are the pressure readings? Are they near atmospheric pressure?
As Nat says both map and Baro sensors should read the same ignition on . What does the signal wire read plugged in ? Have you load tested the earth ? Have you checked all the earth terminals have been refitted correctly and no wires have been pinched ? Hope this helps regards Dave T...