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XJ XJ8 / XJR ( X308 ) 1997 - 2003

XJR Engine Fail Safe P01227

 
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Old 10-07-2018, 09:03 PM
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Default XJR Engine Fail Safe P01227

I finally managed to find and replace the connector body on my X308 and the pins are now changed over to gold plated. However, I am still getting an engine fail safe warning. The throttle body is a fairly new OE part from Jag. I am hard pressed to believe it's the TB. Pulling codes I get P1000 (OBD systems readiness test not complete) and P01227 (mechanical guard circuit low input). I'm seeing the following voltage at each pin (top to bottom on the TB) with the key on and ignition off: 4.98, 4.03, 4.09, and 32.8mV. What am I missing?
 
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Old 03-14-2019, 08:08 PM
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Update: The issue was traced back to a bad ECM.
 
The Following User Says Thank You to nd4spdlsc For This Useful Post:
RJ237 (03-15-2019)
 
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