P2402 Evap System Leak Detection Pump Control Circuit High

Code: P2402
Applies To: Most makes, generic code
Loose Cap Can Set It: Not named in our sources
Typical Fix: $201 at YourMechanic

The leak detection pump circuit voltage is higher than expected.
A shop confirms it with the carmaker's EVAP test and a smoke machine before replacing parts.
Usually yes for now, but get it fixed soon and check for open recalls.

What The Carmakers Call It

EVAP System Leak Detection Pump Control Circuit High, as printed by Subaru of America

Causes Named In Carmaker Bulletins

Our sources name the part this code points to but no single cause. Start with the Leak Detection Pump guide.

No source ties this to the gas cap.

What The Fix Costs

The usual part for this code is the leak detection pump. Published estimates put it at $201 at YourMechanic. The full table with every source and date is on the cost page. A diagnosis first keeps you from paying for a part you did not need, which is why we price what to do after a failed smog check before the fix.

Getting The Light To Go Off

After the repair the light goes off once the EVAP test runs and passes on three drive cycles in a row, and the code is erased after 40 warm up cycles, per CARB. The test only runs under set conditions such as a fuel level between about 15 and 85 percent, so it can take days.

P2400Evap System Leak Detection Pump Control Circuit/open P2401Evap System Leak Detection Pump Control Circuit Low