What does the OBD2 code p0442 mean?

What does the OBD2 code p0442 mean?

OBD2 Code P0442 GM definition: This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04″ in diameter.

What to do if you find a p0442 gas leak?

If you see a P0442 evaporative emission system leak detected code, you may be able to resolve the problem without much effort. The easiest solution may be to remove and reaffix the gas cap. Once you do, clear the code on the OBD-II diagnostic scanner and drive for a few days. If the code does not return, your gas cap likely was the culprit.

What to do if you get a p0422 EVAP code?

If there is a leak, the code will also reappear after the test is run. Once again, this will usually result in other EVAP codes – not just a P0422. But, if none of your testing has proved successful so far, you may want to take a look at the purge and vent valves. The best way to test these valves is with a scan tool.

How can you tell if your EVAP system is leaking?

Your car’s power control module monitors the EVAP system for leaks and other problems. If you see an EVAP leak code, you know there is likely a fuel vapor leak somewhere in the system. The small leak code tells you that the leak in your EVAP system is minor.

What causes a leak in the EVAP system?

  • Missing or loose fuel cap.
  • Incorrect fuel cap used.
  • Evaporative (evap) emission canister or fuel tank leaks.
  • Evaporative (evap) emission system hose leaking.
  • Fuel tank leaking.
  • A small leak in any of the EVAP hoses or fuel tank hoses.
  • A small leak in the purge valve or vent valve.

    What’s causing this p0442 code?

    Causes of the P0442 Code The most common cause of a P0442 code is that you let your car engine run at the gas station with the fuel cap removed. It can also be a leaking fuel cap or a broken hose.

    How much does it cost to repair an EVAP system?

    According to SmogTest.com, the average cost to repair an EVAP system that failed the EVAP test is $250. A diagnostic smoke test, according to British Columbia-based Jericho Electronics, costs $89.99 at some shops. The price does not include repair.

    How is code p0442 fixed?

    With a P0442, the most common DIY repair is to: Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back. Otherwise, replace the gas cap (we recommend an OEM original part, not aftermarket part), or Visually inspect the EVAP system for cuts/holes in tubes/hoses

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