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Home >> Jeep >> 2017 >> Wrangler Sahara, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 106 (2.4L - DTCS P0339 To P0632) >> DTC Troubleshooting >> P0503-Vehicle Speed Sensor 1 Erratic >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
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  .