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
High
Can I keep driving?
Yes, but with caution
Estimated cost
$80 to $700
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

  1. P1235 Fuel Pump Control Out of Range (Ford) High

    On Ford, Lincoln and Mercury, the P1235 code means the fuel pump control is out of range. The engine may stall. The pump is not spinning at the speed the computer is asking for.

    Step-by-step diagnosis for P1235