Exhaust Gas Pressure Sensor Circuit High
The exhaust gas pressure sensor is reading a higher-than-normal voltage.
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What it means (plain English)
The exhaust gas pressure sensor measures pressure in the exhaust system. If the voltage it sends the computer is higher than about 4.5 volts, it indicates a problem with the sensor or the exhaust system.
What the computer is actually seeing
The engine control module (ECM) sees a voltage signal from the exhaust gas pressure sensor that exceeds the normal range, typically greater than 4.5 volts or below 0.5 volts.
What a healthy reading looks like
Normal voltage from the exhaust gas pressure sensor should be between 0.5 to 4.5 volts depending on the exhaust pressure. At idle, expect around 1.5 volts.
Guided diagnostic — the DiagCoach way
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.
- 11. Inspect wiring and connectors for damage or corrosion. Ensure all connections are solid. If damaged, repair or replace as needed. Decision Point: Are the connectors and wires okay?
- 22. With the vehicle running, measure the voltage at the exhaust gas pressure sensor connector. It should be between 0.5 and 4.5 volts. Decision Point: Is the voltage within range?
- 33. If voltage is high (over 4.5 volts), disconnect the sensor and check for a short to ground or voltage. Decision Point: Is there a short or abnormal voltage present?
- 44. If no shorts are found, replace the exhaust gas pressure sensor. Decision Point: Has replacing the sensor resolved the issue?
Common causes
- Faulty exhaust gas pressure sensor
- Short circuit in the wiring or connector
- Exhaust blockage
- Wiring damage or corrosion
- Sensor not calibrated correctly
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to fix this soon, as it may affect emissions and performance, but you can drive it if performance isn't significantly impacted.
Will this code come back after clearing it?
If the issue isn't resolved, the code will likely return after a few drive cycles.
Why does this code appear with other codes?
The exhaust gas pressure sensor works closely with other emission systems, so problems in those systems can cause related fault codes.
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