Evaporative Emission Control System Pressure Sensor Malfunction
This code indicates a problem with the pressure sensor in the EVAP system.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The pressure sensor in the EVAP system is not working properly, affecting the system's ability to detect leaks in the fuel tank and vapor lines.
What the computer is actually seeing
The engine control module (ECM) monitors the EVAP pressure sensor voltage between 0.5V to 4.5V to determine system pressure. If the voltage is out of this range, it triggers the code.
What a healthy reading looks like
Expected voltage from the EVAP pressure sensor should be around 1.5V to 3.0V when the system is in a closed state.
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 wiring and connectors to the EVAP pressure sensor for damage or corrosion. If any are found, repair or replace accordingly. Go to step 2.
- 2With the key in the ON position (engine off), measure the voltage at the EVAP pressure sensor connector. You should see 1.5V to 3.0V. If not, check for wiring issues or replace the sensor. Go to step 3.
- 3If the sensor voltage is correct, use a scan tool to command a test for the EVAP system and monitor the pressure readings. If they don’t change as expected, replace the pressure sensor.
Common causes
- Faulty EVAP pressure sensor
- Wiring issues or poor connections
- Cracked or damaged EVAP canister
- Fuel tank leaks
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive the vehicle with this code?
Yes, but the EVAP system won't operate correctly, leading to possible emissions issues.
Will this code come back after clearing?
If the underlying issue isn't resolved, yes, it will likely return.
Why might this code pair with other codes?
It's common for related EVAP system components to fail simultaneously, like the vent valve or fuel tank pressure sensor.
Working a real vehicle right now?
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