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
- $0 to $600
- 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
P0638 Throttle Actuator Control Range/Performance (Bank 1) High
The P0638 code means the electronic throttle is not following the position the computer is asking for. The most common cause is carbon buildup or a worn throttle body motor. It usually puts the vehicle into limp mode.