What Does P1626 Mean?
The powertrain control module is not receiving the proper fuel enable signal from the anti-theft/security system. This prevents the vehicle from starting or causes immediate shutdown as a theft deterrent measure.
Safety Warning
Vehicle will not start or may shut down immediately, leaving you stranded. Not a safety hazard while driving if already running.
Common Causes
35%
Faulty anti-theft system module or immobilizer unit
30%
Communication wiring or connector issues between security system and PCM
20%
Key or transponder recognition failure
15%
PCM internal failure or corruption
Diagnostic Steps
1
Step 1: Verify security light behavior during key-on and cranking sequence
2
Step 2: Check for proper battery voltage and scan for security system codes in all modules
3
Step 3: Test key transponder function using scan tool security system functions
4
Step 4: Inspect wiring between anti-theft module and PCM for damage or corrosion
5
Step 5: Perform key relearn procedure per manufacturer specifications if transponder issue suspected
Estimated Repair Cost
$150 - $1,200
Parts + labor, varies by vehicle and location
The powertrain control module is not receiving the proper fuel enable signal from the anti-theft/security system. This prevents the vehicle from starting or causes immediate shutdown as a theft deterrent measure.
The most common cause of P1626 (Theft Deterrent Fuel Enable Signal Not Received/ B+ Supply To VCRM A/C Circuit Malfunction) is: Faulty anti-theft system module or immobilizer unit
Typical repair costs for P1626 range from $150 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle will not start or may shut down immediately, leaving you stranded. Not a safety hazard while driving if already running.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1626 to identify the root cause.
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Quick Info
Category
Powertrain
System
Anti-theft/Security System
Difficulty
Type
Manufacturer
Recommended Tools
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