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Autopart Mechanic

Autopa ... 4/11/2018

2012 BMW X1 xDrive28i 6 Cyl 3.00L

Preventive Maintenance

How do I fix the P2402 OBD-II Trouble Code? How can I diagnose EVAP Leak Detection Pump Control Circuit High of my car?

1 Answer

PartsAvatar Ca

PartsAvatar Ca 4/11/2018

What the P2402 code means?

P2402 is an OBD-II generic code for the engine control module (ECM) detecting the evaporative system leak
detection pump control circuit has a high voltage signal return.

What causes the P2402 code?

Evap leak detection pump failure

Power train Control Module (PCM) failure

Wiring issue

What are the symptoms of the P2402 code?

Normally, no symptoms other than a stored code and a service engine soon lamp will be exhibited.

However, other evaporative emission control system codes are likely to be present.

Common mistakes when diagnosing the P2402 code?

Inordinate amounts of time are often spent attempting to detect a leak when this code is presented before
first testing for leak detection pump operation. However, evaporative emission control system components
are sometimes replaced in error when a vacuum leak is present or the fuel cap is not properly tightened.

What repairs can fix the P2402 code?

Replace the evaporative pump and fuse.

Replace the evaporative pump relay.

Repair the evaporative pump connector pins for corrosion, melted, or loose connections.


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