Theft Deterrent Fuel Enable Signal Lost

What this code means

The PCM lost the fuel enable signal from the Body Control Module (BCM). The theft deterrent system sends a fuel enable signal to the PCM when it verifies the correct key is being used. Without this signal, the PCM will not pulse the fuel injectors. If the signal was lost after initial validation, the engine continues to run. If lost before validation, the engine will start and immediately stall.

Symptoms

• Vehicle will not start or starts then immediately stalls
• Check Engine Light
• Security light illuminated
• No-start condition
• Intermittent starting problems

Common causes

• Faulty ignition key or worn key pellet
• Passlock sensor failure
• Body Control Module (BCM) malfunction
• Wiring issue on fuel enable circuit between BCM and PCM
• Ignition switch failure
• BCM replaced without performing relearn procedure

Diagnostic steps

1. Check security indicator light behavior
2. Test fuel enable signal at PCM
3. Inspect wiring between BCM and PCM
4. Test Passlock sensor resistance
5. Attempt security relearn procedure
6. Check for BCM codes

Repair notes

Perform 10-minute or 30-minute security relearn procedure. If intermittent, inspect wiring between BCM and PCM for breaks or chafing. Replace Passlock sensor or BCM if relearn fails.

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