What does the p0442 code mean on a Chevy Cavalier?
P0442 Chevrolet Tech Notes The P0442 code means that the control module has detected a small leak in the Evaporative Emission (EVAP). The loose fuel tank filler cap is the most common cause that triggers the P0442 code. User Submitted Video Malfunction is detected when EVAP control system has a leak, EVAP control system does not operate properly.
What is the cause of a code p0442 leak?
What Is The Cause Of Code P0442? 1 Loose or damaged gas cap 2 Leaking or disconnected EVAP hose 3 Faulty purge volume control valve 4 Faulty canister vent control valve 5 Charcoal canister leak 6 Leaking fuel tank
What does the po442 code on a car mean?
The PO442 indicates that there’s a small leak in the EVAP system. When the vehicle engine is turned off, the Electronic Control Unit (ECM) carries out a leak test to double-check that the evaporative emission control system is functioning correctly. In this test, the ECM seals the EVAP system.
Why is my EVAP code not coming back?
If the code does not return, your gas cap likely was the culprit. Of course, there is a chance that your gas cap either has worn out or is not compatible with your EVAP system. If so, you should replace the cap with an OEM equivalent available at your local AutoZone.
P0442 Chevrolet Tech Notes The P0442 code means that the control module has detected a small leak in the Evaporative Emission (EVAP). The loose fuel tank filler cap is the most common cause that triggers the P0442 code. User Submitted Video Malfunction is detected when EVAP control system has a leak, EVAP control system does not operate properly.
Can a p0442 cause a vent valve to leak?
It is important to address these codes before you attempt to repair the P0442. Purge Valve or Vent Valve codes (P0446, P0443) can trigger a P0442. If the Vent Valve or Purge Valve is not functioning correctly, it may lead to a small leak that will set the P0442.
What does the p0442 code on powertrain mean?
The P0442 code indicates that there is a small leak in the EVAP system, but this is somewhat misleading. What the code really indicates is that the EVAP system will not hold a specified level of vacuum for a specified amount of time when it performs its leak test. Here is how the evaporative leak test is performed by the Powertrain Computer:
What causes a fuel tank sensor to set p0442?
If the Vent Valve or Purge Valve is not functioning correctly, it may lead to a small leak that will set the P0442. The same applies to any Fuel Tank Pressure Sensor codes (P0451, P0452) or Leak Detection Pump codes (P1495).