Exhaust Gas Pressure Sensor 1
Exhaust Gas Pressure Sensor 1 signal out of range.
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What it means (plain English)
The engine's computer is getting a signal from the exhaust gas pressure sensor that's either too high or too low, which can mess with emissions controls.
What the computer is actually seeing
The exhaust gas pressure sensor should send a voltage signal that corresponds to the pressure in the exhaust system, typically between 0.5 to 4.5 volts under normal operating conditions.
What a healthy reading looks like
Normal exhaust pressure sensor readings should be around 1.0 to 2.5 volts under standard operational loads.
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.
- 1Check the engine coolant level and ensure all fluids are at proper levels before testing. Ensure vehicles are off and cool before inspecting wiring and connectors.
- 2Inspect the wiring harness and connector to the exhaust gas pressure sensor for any signs of damage or corrosion.
- 3Test the exhaust gas pressure sensor with a multimeter while the engine is running. Look for a voltage output outside the 0.5 to 4.5 volts range.
- 4If the sensor voltage is outside the expected range, replace the exhaust gas pressure sensor and clear the codes.
- 5After replacing the sensor, monitor exhaust pressure readings during operation to verify the repair.
Common causes
- Faulty exhaust gas pressure sensor
- Wiring issues or damaged connectors
- Blocked exhaust system or particulate filter
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
Moderate severity means you should fix it soon, as it can impact emissions and performance.
Will this code come back after resetting the PCM?
If the underlying issue isn't fixed, the code will likely reappear.
Why do I see related codes with this one?
They often indicate a related problem, like issues with the exhaust system or additional sensors.
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