Question about 1999 Chevrolet Lumina
Po442= evap emission control system leak (small)
po742= torque converter clutch soleniod circuit stuck on
i got these out of the booklet for my code reader po442pd wasn't listed
Posted on May 08, 2010
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Posted on Jan 02, 2017
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Trouble Code: P0442
EVAP System Small Leak (0.040") Detected
Charcoal canister is loaded with fuel or moisture . Fuel filler cap is loose, cross-threaded, damaged or wrong part . Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking. Fuel tank pressure sensor is damaged, disconnected or it failed. Fuel tank vapor line(s) is clogged, damaged or disconnected. Purge valve vapor line is clogged, damaged, or disconnected. Purge solenoid or Vent solenoid has a small leaking (sticking.) PCM has failed . TSB 01-06-04-007A contains a repair procedure for this code.
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