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Home >> Jeep >> 2008 >> Liberty Limited, 4WD, Part Time >> Repair and Diagnosis >> Engine Performance >> System >> DTCS U1110 To U1418, System Checks, Checking Pcm Power And Ground Circuits >> U1403-Implausible Fuel Level Signal Received >> Possible Causes

Possible Causes

Possible Causes 
CAN C OPEN OR SHORTED
FUEL LEVEL SENSOR
(N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO GROUND
(N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO THE (K91) SENSOR GROUND CIRCUIT
EXCESSIVE RESISTANCE IN THE (N4) FUEL LEVEL SIGNAL CIRCUIT
EXCESSIVE RESISTANCE IN THE (K91) SENSOR GROUND CIRCUIT
TOTALLY INTEGRATED POWER MODULE (TIPM)
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.