I have an 04 sunfire which keeps getting a P0442 code. We have changed the gas cap and checked the tank for corrosion. We have also changed the purge cylenode. When the check engine light does come on I get horrible gas mileage and there is no smell of gas except for it running a little rich. Now my dad is a machanic and we are starting to run out of ideas on what could be the issue, any ideas?
Smoke test the system . P0442 small leak .
This DTC tests the evaporative emission (EVAP) system for a small leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the vacuum decay rate. At an appropriate time, the control module turns the EVAP canister purge solenoid valve ON and the EVAP vent solenoid valve ON. This allows the engine to draw a vacuum on the EVAP system. At a calibrated time, or vacuum level, the control module turns the EVAP canister purge solenoid valve OFF, sealing the system, and monitors the FTP sensor input in order to determine the EVAP system vacuum decay. If the control module detects a leak larger than a calibrated amount, this DTC sets.
EVAP Leaks P0442 and P0455
SOURCE: 2002 pontiac sunfire has check engine light
Your problem is typical for these cars. The throttle position sensor is bad. Go to Auto Zone and have them check the codes to confirm this. i've seen this many times, that's usually the problem. It makes the car feel like the brakes are on. Hope this helps. Let me know. Phil
SOURCE: check gauges light
Possible bad guage, bad wiring, or bad sending unit. Check each one independently of each other, start with wiring first, then sending unit.
SOURCE: my 2004 sunfire just went over 106000 miles and
Have a scan tool connected , so that you can retreive the diagnostic codes, this will help isolate the problem.
Good luck !
407 views
Usually answered in minutes!
×