P200CParticulate Filter Over Temperature (Bank 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P200C reports that the exhaust at the bank 1 particulate filter has become hotter than the filter may tolerate, typically when a heavily loaded filter burns off during regeneration. GM's diesel tables set it as Type A, MIL on the first trip: the 2018 group uses more than 850 °C in regeneration and 800 °C otherwise ahead of the filter (30 of 40 samples), the 2020 table 900 °C behind it, the 2025 table 800 °C from 300 of 450 samples. Ford's 2023 diesels need over 830 °C upstream or 950 °C downstream, or a dead downstream sensor, for about 3 s. Hino's tech tip for 2011–2014 trucks has the DOC face checked for melting, the DPF replaced if soot passed it, and the SCR catalyst inspected. GM's PIP5468 for the L5P adds leaking charge-air ducts. Because heat can crack the filter, find the trigger before clearing.
- What you may notice
- Malfunction indicator lamp on
- Regeneration aborted or blocked
- Possible power reduction to protect the exhaust system
- Likely causes
- LikelyExcess soot load burning off too fast during regeneration
- PossibleToo much fuel reaching the exhaust (leaking injector, post injection, exhaust brake or injector problems)
- PossibleLeaking charge-air ducting upsetting combustion and soot model
- RareFaulty exhaust temperature sensor near the filter
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.