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Crown Vic. Sensor Ref. Voltage 'A' Low : p0642

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sadkowmx90

• Chicopee, MA, USA

• Registered on 12/5/2016

• 1 post

Posted:12/5/2016 10:12

I have a 2008 CVPI and I am getting the following 4 codes:

P0107 (MAP Sensor Signal Low)
P0192 (Fuel Rail Pressure Sensor Circuit Low)
P0452 (EVAP Pressure Sensor Circuit Low)
P0642 (Sensor Reference Voltage 'A' Circuit Low)

I am assuming that there is either a short somewhere or there is a problem with the ECM. How do I determine if the ECM is either good or bad ? Would anyone have a pin-out of the ECM and the voltage ranges of each pin ?

If my assumption about the issue is wrong, please chime in.

Thanks

Gz6jjd

• Olathe, KS, USA

• Registered on 1/8/2019