Powertrain, generic (extended)

P200C Particulate Filter Over Temperature (Bank 1)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Excess soot load burning off too fast during regeneration
Too much fuel reaching the exhaust (leaking injector, post injection, exhaust brake or injector problems)
Leaking charge-air ducting upsetting combustion and soot model
Faulty exhaust temperature sensor near the filter

Symptoms

  • Malfunction indicator lamp on
  • Regeneration aborted or blocked
  • Possible power reduction to protect the exhaust system

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–4,000
Time1–6 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

diesel particulate filterdpf temperature sensorregeneration strategy

Related codes

P200DP200EP2002P2463P2428

References: gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com, fordservicecontent.com.