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DTC P200E: Catalyst System Over Temperature (Bank 1)

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DTC P200E: CATALYST SYSTEM OVER TEMPERATURE (BANK 1)

Description:  The PCM monitors the exhaust gas temperature bank 1, sensor 2 (EGT12) and exhaust gas temperature bank 1, sensor 3 (EGT13) sensors for an over temperature concern. If the EGT12 sensor temperature is greater than 830°C (1, 526°F) or the EGT13 sensor temperature is greater then 950°C (1, 742°F), the DTC is set. This DTC causes the PCM to immediately illuminate the malfunction indicator lamp (MIL) and enter a torque reduction failure mode effects management (FMEM), which may result in engine shutdown. Once the engine is shut down, the PCM prevents the engine from restarting for 1 hour. If the EGT13 sensor is not working, the engine will not start.
Possible Causes: 
  • Diesel particulate filter regeneration occurred during heavy load and high ambient temperature conditions
  • Excessive amount of soot or ash in the diesel particulate filter
  • Damaged EGT12 sensor
  • Damaged EGT13 sensor
  • Coolant contamination of the exhaust system
  • Oil contamination of the exhaust system
Diagnostic Aids:  This DTC is an informational DTC and may be set in combination with a number of other DTCs which are causing the FMEM. Diagnose other DTCs first. Check the EGT12 and EGT13 PIDs. If no other DTCs are present, the system is operating correctly at this time. Advise the customer of the conditions that may cause this DTC.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST RC .