Exhaust Gas Pressure Sensor Circuit Range/Performance Problem

The exhaust gas pressure sensor measures the pressure inside the exhaust system. If the readings are too high or too low, it indicates a problem with the exhaust flow, possibly due to clogs or leaks.

The engine control module (ECM) expects the exhaust gas pressure to fall within a specific range. If the pressure fluctuates outside of expected values, the ECM triggers this code.

Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.

1. 11. Check for obvious physical damage to the exhaust gas pressure sensor and wiring. If damaged, repair or replace.
2. 22. Inspect connectors for corrosion or loose connections. Clean or reseat as necessary.
3. 33. Using a scanner, check the current exhaust gas pressure readings versus expected values. If readings are outside expected range, proceed to next step.
4. 44. Remove and inspect the DPF for blockages. If clogged, perform a cleaning or replacement of the DPF as needed.
5. 55. Test the exhaust gas pressure sensor with a multimeter. Compare the voltage signal to known good specs. If out of range, replace the sensor.
6. 66. After all repairs, clear the codes and test drive the vehicle. Monitor for the return of the code.

• Clogged diesel particulate filter (DPF)
• Faulty exhaust gas pressure sensor
• Damaged wiring or connectors in the exhaust pressure circuit
• Exhaust leaks downstream of the sensor
• Malfunctioning turbocharger (if applicable)

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