What this code means

The PATS immobilizer code has not been programmed into the PCM. This typically occurs when a new PCM is installed without completing the security programming procedure.

Symptoms

• Engine will not start
• Security light on or flashing
• No fuel delivery or spark

Common causes

• New PCM installed without PATS programming
• PCM memory corruption
• Failed key programming procedure

Diagnostic steps

1. Verify PCM is programmed with PATS codes
2. Perform key programming procedure
3. Check for PCM software updates

Repair notes

Program PATS codes into PCM using dealer-level scan tool. Program at least 2 keys.

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