Emissions Issue 2011 Malibu

Asked by Jun 29, 2019 at 08:06 PM about the 2011 Chevrolet Malibu LS FWD

Question type: Maintenance & Repair

Hello,

I have a 2011 Chevy Malibu 2.4 Flex Fuel roughly 80k miles. I have been
having a pesky emissions code P0442 come up for the past six months. I am
noticing the smell of gas when started from cold. The car doesn't feel like it
has full power when accelerating onto the highway. And I noticed the gas
mileage has dropped significantly.

I have changed the canister purge valve twice, the Mass air flow sensor, the
gas cap, and the upstream O2 sensor. Any ideas as to what this could be. It
is the only code that comes up twice when I run a diagnostics test. I have
taken it into a mechanic and they were unable to help. Any help would be
greatly appreciated !!

2 Answers

235,395

I think you need to do a smoke test to find the leak.

1 people found this helpful.
117,065

Exactly! This is a small leak in the EVAP system. The EVAP system pulls gasoline fumes from the gas tank into the engine to be burned. The computer can detect a leak so small in the system it can't be seen with the naked eye! So a smoke test is the only way to find the leak. If your mechanic doesn't know what a smoke test is or balks about doing the test (likely because he doesn't know what it is) take the vehicle elsewhere for the test and repair! Hope that helps! Jim

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