Error Code P200E: Severity, Symptoms, and Solutions
Severity of Code P200E
The P200E code is a critical code that must be addressed promptly. It is related to the selective catalytic reduction (SCR) system and the catalyst.
➡ Main risk: A clogged or ineffective catalyst can lead to increased pollutant emissions and engine damage if the issue is not resolved quickly.
Possible Symptoms
- Decreased engine performance.
- Excessive black smoke from the exhaust.
- Higher fuel consumption.
- Presence of other emission-related error codes.
Common Causes
- SCR system failure.
- Faulty SCR injector.
- Insufficient DEF fluid level or poor-quality fluid.
- Faulty exhaust temperature sensor.
- SCR controller issue or programming error.
- Exhaust leaks before the catalyst.
- Installation of non-compliant or modified exhaust parts.
Diagnostic and Repair Steps
1. Checking Associated Error Codes
- If other SCR codes are present, diagnose them first before addressing P200E.
- Check if there is a Technical Service Bulletin (TSB) specific to your vehicle.
2. Visual Inspection
- Inspect the SCR system wiring, exhaust temperature sensors, and NOx sensors.
- Ensure there are no burnt wires, cut wires, or corroded connectors.
3. Checking Catalyst Temperatures
- Use an infrared thermometer to measure the temperature before and after the catalyst.
- Compare the data with that from the OBDII scanner.
4. Testing Sensors and the SCR System
- If temperature inconsistencies are detected, test the temperature sensors with a multimeter (DVOM).
- Ensure the DEF fluid is present and meets the manufacturer’s specifications.
- Check the operation of the SCR injector.
5. Checking the Catalyst
- If everything appears correct but the problem persists, the catalyst may be faulty and require replacement.
6. Clearing the Code and Road Testing
- Once repairs are completed, clear the code and test the vehicle until the PCM enters readiness mode or the code reappears.
If the problem persists, professional intervention may be necessary for a thorough diagnosis.