P0442 small evap leak

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orgdnr
Posts: 132
Joined: Wed Mar 18, 2015 3:00 pm
Location: Chatsworth California

P0442 small evap leak

Post by orgdnr »

The car failed the emissions test with 3 monitors incomplete and a P0442 evap small leak. The gas cap checked out ok. Not having access to a smoke machine here, has anyone noticed a common evap problem with these cars. Also the fault shows as permanate and will not clear.
Dave
Chatsworth Ca

2012 9c1 ported LSA kooks 1 7/8 long tubes rotofab cai 575rwhp 570 tq. best repeatable 1/4 mile 11.32
69 Roadrunner 383 A/G 4 sp. bench seat (for sale) no rust
30 model A pickup QMP 383
Built Ford tough with chevy stuff
71 GMC suburban 4X4
CrashTestDummy
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Joined: Sat Feb 07, 2015 2:31 pm
Location: Pearland, Texas

Re: P0442 small evap leak

Post by CrashTestDummy »

Not sure about the 9C1, but that's a common code on '07-'14 Tahoes. The fix, if tightening/replacing the gas cap, is to replace the purge solenoid, harness & hoses.
Gene Beaird,
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2018 Tahoe PPV (her car)
1995 DGGM Impala SS
1985 Firebird - 310 LS1 C Prepared autocross car.
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orgdnr
Posts: 132
Joined: Wed Mar 18, 2015 3:00 pm
Location: Chatsworth California

Re: P0442 small evap leak

Post by orgdnr »

On another note. The car also has consumed 3/4 of a tank of fuel in 70 miles. I did jump on it a few times but mostly cruising. Its at the dealer now as I have limited diagnostic abilities here. Fingers crossed its a warranty issue.
Dave
Chatsworth Ca

2012 9c1 ported LSA kooks 1 7/8 long tubes rotofab cai 575rwhp 570 tq. best repeatable 1/4 mile 11.32
69 Roadrunner 383 A/G 4 sp. bench seat (for sale) no rust
30 model A pickup QMP 383
Built Ford tough with chevy stuff
71 GMC suburban 4X4
ejf2461
Posts: 132
Joined: Mon Feb 15, 2016 4:18 pm
Location: Indianapolis

Re: P0442 small evap leak

Post by ejf2461 »

I had mine in for this exact problem 4x. First was the gas cap which didnt even make it home and the CEL came back, 2nd was the cannister being replaced and this last 3 days. 3rd trip was a purge valve which lasted about a month. Not sure what they did 4th time but they repaired a leak in a line and that has kept it off for a while now. EVAP LEAK=EVAP money from your wallet. Sad thing is mine was taken to the dealer to fix and still need 4x to fix!
2013 Impala 9C1
2013 Caprice PPV 9C1 V8
xcidmigs
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Joined: Fri Feb 13, 2015 8:12 pm
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Re: P0442 small evap leak

Post by xcidmigs »

ejf2461 wrote:I had mine in for this exact problem 4x. First was the gas cap which didnt even make it home and the CEL came back, 2nd was the cannister being replaced and this last 3 days. 3rd trip was a purge valve which lasted about a month. Not sure what they did 4th time but they repaired a leak in a line and that has kept it off for a while now. EVAP LEAK=EVAP money from your wallet. Sad thing is mine was taken to the dealer to fix and still need 4x to fix!
Wow how many stories are you going to tell us about your "great" dealership working you over? Guess they make back that "Courtesy discount" on the parts with you on a regular basis...

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