Evaporative Emission System Pressure Sensor Fault
There's a problem with the pressure sensor in the evaporative emission control 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 that's supposed to monitor the gas tank and its vapor system isn't reading correctly or is damaged. This can cause excessive pressure or vacuum in the fuel system.
What the computer is actually seeing
The computer expects to see voltage levels from the pressure sensor fluctuate between 0.5V (0 inches of water column) to around 4.5V (around 10 inches of water column) based on the pressure changes in the fuel tank.
What a healthy reading looks like
Pressure sensor voltage should be between 0.5V to 4.5V under normal operating conditions, corresponding to a pressure range of approximately 0 to 10 inH2O.
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 pressure sensor for damage or corrosion. Secure all connections.
- 2Using a scan tool, read the voltage output of the pressure sensor. It should be between 0.5V and 4.5V in normal conditions.
- 3If the voltage is outside this range, replace the pressure sensor and retest.
- 4If the sensor output is normal but the code persists, check for vacuum leaks or issues in the EVAP lines.
- 5Inspect the fuel tank for defects or clogging; replace any damaged components.
Common causes
- Faulty pressure sensor
- Wiring issues (shorts or breaks)
- Faulty fuel tank or EVAP system components
- Clogged or leaking EVAP lines
- Connector issues at the sensor or ECU
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable, but you should fix it soon to avoid emissions issues.
Will this code come back after clearing?
If the underlying issue isn't resolved, yes, it will likely return.
Why do I see this code with low fuel levels?
Low fuel can affect pressure sensor readings leading to false codes.
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