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Home >> Chrysler >> 2011 >> 300 Base, Gas >> Repair and Diagnosis >> External Pages >> Different car >> Section 1035 (DTCS P0218-00 To P125D-00 - C635 Dual Disc Clutch Transmission (DDCT)) >> DTC Troubleshooting >> P0721-00-Engine Operating Speed Check - Signal Invalid >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2015 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
Antilock Brake System (ABS) WHEEL SPEED SENSOR DTCS
TRANSMISSION CONTROL MODULE (TCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  C635 DDCT PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .

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