OT: BMW e36 (P0442) OBD II error fix
09-01-2012, 03:41 PM
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OT: BMW e36 (P0442) OBD II error fix
Small evap leak error
From first hand experience I've found the problem to be caused by:
1) Gas cap - cheap and easy first try fix
2) Evap canister - minor pain to remove, located above the right wheel liner between the liner and the fuel filler neck. have to remove the RR wheel and liner to get to it. 3 or 4 hoses attached, most likely one of the small hose nipples will be cracked at the canister. Can sometimes use plastic cement to (temp) repair it. My repair attempt lasted about 9 mos., next time I just replaced the canister.
3) Main fuel line hose between filler tube and fuel tank - about the size of a radiator hose w/ 90 deg bend. It loops over the RR axle and goes into the fuel tank. By accident found the filler end was loose and hose clamp just couldn't get a tight fit. Happened to be doing a major service on the car, when checking CV boots noticed fuel hose wasn't seated all the way on the (long) filler neck. Tried to tighten but it just wouldn't get a firm grip on the filler neck (tank end was fine), Replaced the hose ($55 - 80 depending on source) and error went away, new hose fits nice and snug on both ends.
P/N - 16 11 1 182 831 ('97 M3 sedan)
www.thebmwpartstore.com/ cheapest I've found yet.
No more P0442 errors.
One more thing, the cap for the (round) test plug in the engine compartment must be re-installed or the OBD II port in the driver's footwell won't communicate to your OBD II reader. DAMHIK
From first hand experience I've found the problem to be caused by:
1) Gas cap - cheap and easy first try fix
2) Evap canister - minor pain to remove, located above the right wheel liner between the liner and the fuel filler neck. have to remove the RR wheel and liner to get to it. 3 or 4 hoses attached, most likely one of the small hose nipples will be cracked at the canister. Can sometimes use plastic cement to (temp) repair it. My repair attempt lasted about 9 mos., next time I just replaced the canister.
3) Main fuel line hose between filler tube and fuel tank - about the size of a radiator hose w/ 90 deg bend. It loops over the RR axle and goes into the fuel tank. By accident found the filler end was loose and hose clamp just couldn't get a tight fit. Happened to be doing a major service on the car, when checking CV boots noticed fuel hose wasn't seated all the way on the (long) filler neck. Tried to tighten but it just wouldn't get a firm grip on the filler neck (tank end was fine), Replaced the hose ($55 - 80 depending on source) and error went away, new hose fits nice and snug on both ends.
P/N - 16 11 1 182 831 ('97 M3 sedan)
www.thebmwpartstore.com/ cheapest I've found yet.
No more P0442 errors.
One more thing, the cap for the (round) test plug in the engine compartment must be re-installed or the OBD II port in the driver's footwell won't communicate to your OBD II reader. DAMHIK
Last edited by Slow Guy; 09-01-2012 at 04:26 PM.
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