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
- $100 to $3,000
- 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
P1811 Maximum Adapt and Long Shift (GM) High
On General Motors vehicles (Chevrolet, GMC, Buick, Cadillac), the P1811 code means a shift took too long and the pressure adaptation has reached its maximum. You may feel a hard shift as the transmission enters protection mode. Other brands may define this number differently.