P2402: Evaporative Emission System Leak Detection Pump Control Circuit High
What to do
The car drives normally; the evaporative monitor cannot run. Ask for the supply and fuse to be checked before the pump is replaced — those are the cheap end of the same code.
What this code means
The leak detection pump control circuit reads above its valid range — an open circuit, a short to supply, or a pump motor that has failed open.
An open motor winding is the ordinary end-of-life failure for a pump that lives outside in the weather and runs only intermittently. Long idle periods are hard on it: a pump that sits unused for days and then runs once is more prone to corrosion seizing it than one in constant use.
Likely causes
Start here
- Open circuit in pump wiring · moderate
- Faulty EVAP leak detection pump · moderate
- Corroded or loose connector · easy
Less common
- Blown fuse or failed supply · easy
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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