P1639
Vehicle ID Block Corrupted Or Not Programmed
Severity
🔴 HighCan you drive?
Do not drive — repair immediately
Approx. repair cost
$56–278 (est.)
Symptoms
- Check Engine light comes on
- Problems starting the engine
- Limited vehicle functionality
- Malfunctions of electronic systems
Causes
- Data corruption in the identification block
- Unprogrammed identification block
- ECU software failure
- Problems with ECU power supply
- Physical damage to the ECU
How to Fix
- Check power supply and grounding of the ECU
- Read and analyze errors using a diagnostic scanner
- Reprogram the identification block
- If necessary, replace the ECU
- Contact an official dealer for reflashing