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
- $0 to $1,200
- 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
U0403 Invalid Data Received From Transfer Case Control Module Medium
The U0403 code means the transfer case module is sending messages, but with data that does not make sense or is out of range. The 4x4 system may not engage, or the transmission may shift poorly. The module is often just passing along a bad reading from one of its own sensors.