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
- Low
- Can I keep driving?
- Yes, no immediate risk
- Estimated cost
- $30 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
P0684 Glow Plug Control Module to PCM Communication Circuit Range/Performance Low
The P0684 code means the information the glow plug control module sends to the computer is not consistent. Check the glow plugs and the module, because a plug with an odd resistance can confuse the module. It is a low severity code and you can keep driving.