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 $1,500
- 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
U0027 Low Speed CAN Communication Bus (+) Shorted to Bus (-) High
The U0027 code means the computer detected a short between the two wires of the low speed CAN bus, with the (-) wire shorted to the (+) wire. It usually sets communication codes in several modules and, depending on the network affected, limp mode or a dash full of warning lights. With the two wires tied together, the network stops working.