Multi-code OBD2 diagnosis
Enter all the codes your scanner showed, not just the first one. We give you the overall severity, whether you can keep driving, the order in which to check them and how they relate to each other.
Summary
- Overall severity
- Medium
- Can I keep driving?
- Yes, but with caution
- Estimated cost
- $50 to $250
- Codes analyzed
- 1 of 1
The order below is the recommended one: first the codes that can cause the others. After each repair, clear the codes and check which ones come back.
Order of inspection
P1639 Vehicle ID Block Corrupted or Not Programmed (Ford) Medium
On Ford, Lincoln and Mercury vehicles, the P1639 code means the vehicle identification block is corrupted or was never programmed. The speedometer may read wrong. It almost always follows a computer replacement that was not configured.