Emissions

P200E — Particulate Filter Over Temperature (Bank 1)

Severity: high Drive with care, to a shop

What P200E means

The engine control unit detected, through exhaust gas temperature sensors, that the bank 1 particulate filter got hotter than its safe limit. This usually happens during a failed or runaway regeneration, when stored soot burns too aggressively. Overheating can melt the filter's ceramic and damage the nearby catalytic converter.

Symptoms

  • DPF or check engine light on
  • Limp mode and reduced power
  • Burning smell from the exhaust
  • Smell of unburnt fuel
  • Frequent or prolonged regeneration attempts

Possible causes

  1. Failed or interrupted filter regeneration
  2. Excessive soot load in the DPF
  3. Faulty exhaust gas temperature (EGT) sensor
  4. Fuel dosing problem during regeneration (injector or dosing valve)
  5. Aged or damaged catalytic converter
  6. Downstream oxygen sensor fault giving wrong readings
  7. Exhaust leak
  8. Misfire or mixture fault overloading the catalyst

How to diagnose

  1. Scan all codes and freeze frame data, addressing any misfire or mixture codes first
  2. Check DPF soot load, distance since last regeneration and differential pressure in live data
  3. Compare EGT sensor readings before and after the filter and check them for plausibility
  4. Compare upstream and downstream oxygen sensor signals
  5. Inspect the exhaust system for leaks and damage
  6. Test the fuel dosing injector or in-cylinder post-injection during regeneration
  7. Inspect sensor wiring and connectors for heat damage and corrosion
  8. Assess the filter and catalyst condition visually and by backpressure

Common fixes

  • Repair the cause of misfires or rich mixture
  • Replace a faulty EGT or oxygen sensor
  • Fix exhaust leaks
  • Perform a forced regeneration or professional DPF cleaning
  • Replace a damaged DPF or catalytic converter
  • Repair or replace the fuel dosing injector

Questions and answers

What does code P200E mean?

It means the bank 1 particulate filter overheated. The control unit saw a temperature above the allowed limit, most often because of a failed regeneration or heavy soot load.

Can I drive with P200E?

Only briefly and to a repair shop. Overheating can damage the filter and catalyst, so don't put off diagnosis.

Can I just clear P200E?

Clearing the code won't fix the cause and it will likely return. Find out why the filter overheated first, or you risk losing the filter.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.