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
- $20 to $900
- 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
P0864 TCM Communication Circuit Range/Performance High
The P0864 code means the communication with the transmission control module (TCM) is out of its expected range or performance. The transmission may go into limp mode, or the shifter may stop responding. Damaged wiring or a module without power is the usual cause.