Question 1

What does P1626 mean?

Accepted Answer

P1626 - Theft Deterrent Fuel Enable Signal Lost (GM). GM: The PCM lost the fuel enable signal from the body control module/Passlock system.

Question 2

What are the symptoms of P1626?

Accepted Answer

Engine starts then immediately dies, Security light on or flashing, No-start after 10 minutes

Question 3

What causes P1626?

Accepted Answer

Passlock sensor failure, BCM communication issue, Wiring problem, Ignition lock cylinder issue

Question 4

How much does it cost to fix P1626?

Accepted Answer

Typical repair cost: $50-$500. GM Passlock system is notorious for this. The 10-minute relearn: turn key to ON (not start), wait for security light to stop flashing (~10 min), turn off, wait 5 seconds, start. May need to do 3 times in a row.

P1626 — Theft Deterrent Fuel Enable Signal Lost (GM)

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Common symptoms of P1626

Common causes of P1626

Repair cost & difficulty

Vehicles commonly affected

Related trouble codes