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emas 10-29-2012 02:26 PM

2000 740i - Code P1442
I recently got the engine light on and the code using the scanner showed as P1442. Some sort of leak in the emissions. I have done more research on it with no solution. I checked the gas cap, it showed a wet area on the outside rubber seal past the contact point ring. I corrected this with another gas cap, but the light came back on. Does anyone know what component to focus on next to fix this?

740-iLL 10-29-2012 04:19 PM

Fuel tank leak detection system, and this is a common cause....

This system pressurizes the fuel system every fifth (or so) start-up so check for leaks. There could be a legitimate leak, a faulty gas cap, or a problem with the wiring. Seems that BMW routed the wiring for this unit between a hose and the driver-rear plastic inner fender well. The wire eventually wears through and the ECU doesn't get a a good response from the system, therefore it issues the P1442 fault code.

So if you have replaced the gas cap and the light and same code come up, I would check out the wiring to see if any wires have frayed over time. If all wires look ok to you, then you have to check the gas tank itself and the hoses/pipe that connect to it.

emas 11-13-2012 11:00 AM

Thanks. I will try that next. Your 740 is ill!

740-iLL 11-13-2012 06:08 PM

Thanks bud.

Let me know what you find

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