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
- $40 to $300
- 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
P0451 Evaporative Emission Control System Pressure Sensor Range/Performance Low
The P0451 code indicates an implausible reading from the fuel tank pressure sensor in the EVAP system: electrically valid, but not what the computer expects. The main effect is that the EVAP leak test cannot run. Most of the time there are no other driving symptoms.