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Home >> Jeep >> 2020 >> Compass Trailhawk >> Repair and Diagnosis >> Engine Performance >> System >> 2.4L - DTCS P0141 To P0600 >> DTC Troubleshooting >> P0503-Vehicle Speed Sensor 1 Erratic >> Possible Causes

Possible Causes

Possible Causes
ACTIVE BUS OR COMMUNICATION DTCS
IMPROPER TIRE INFLATION
TIRE SIZES DO NOT MATCH
POWERTRAIN CONTROL MODULE (PCM)

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