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
- Medium
- Can I keep driving?
- Yes, but with caution
- Estimated cost
- $50 to $2,500
- 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
P2459 Diesel Particulate Filter Regeneration Frequency Medium
The P2459 code means the diesel particulate filter has to regenerate too often, because the engine makes more soot than normal or the sensor misjudges the load. Drive with caution and head to a shop, because a filter that cannot keep up ends up in limp mode.