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Home >> Jeep >> 2007 >> Commander Overland, RWD >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P3400 To U1403 >> U110E-Lost Ambient Temperature Message >> Possible Causes

Possible Causes

Possible Causes 
CAN C BUS CIRCUIT OPEN OR SHORTED
FRONT CONTROL MODULE (FCM)
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

The ambient temperature sensor signal is a direct input to the FCM. The FCM sends the PCM the ambient temperature signal over the CAN C bus.

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