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
- $120 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
P0740 Torque Converter Clutch Circuit Malfunction High
The P0740 code means the clutch that locks the torque converter, so the transmission can run without slipping, is not doing what the computer commands. The typical symptom is a shudder at steady speed, like driving over a rumble strip, plus a noticeable jump in highway fuel use. Check the fluid first, because its level and condition explain a large share of these cases.