What Is Engine Code P0442

P0442 is a generic OBD-II code that indicates that the evaporative emission control system (EVAP) has a leak. The EVAP system is designed to prevent fuel vapors from escaping into the atmosphere. When there is a leak in the system, the engine will run rich in order to compensate for the lost fuel vapors. This can lead to decreased fuel economy, increased emissions, and potential damage to the engine.

So What Is Engine Code P0442?

P0442 is a generic OBD-II code that indicates that the vehicle’s evaporative emissions control system has failed a test. This code is often caused by a leak in the evaporative emissions control system, such as a cracked gas cap or a damaged charcoal canister.

What is Engine Code P0442?

Engine Code P0442 is a generic OBD-II code that indicates that the evaporative emission control system (EVAP) leak detection pump is not working properly. This code is set when the PCM (Powertrain Control Module) detects that the EVAP system is not able to maintain a vacuum.

Symptoms

A few of the symptoms of Engine Code P0442 include:

A check engine light on the dashboard
A smell of gas inside the vehicle
A decrease in fuel economy
A rough idle
Engine misfires

Causes

There are a few different things that can cause Engine Code P0442, including:

A leak in the EVAP system
A faulty EVAP purge valve
A faulty EVAP canister
A clogged EVAP vent solenoid
A problem with the PCM

Diagnosis

To diagnose Engine Code P0442, a mechanic will first perform a visual inspection of the EVAP system. They will look for any leaks, damage, or obstructions. They will also check the operation of the EVAP purge valve, canister, and vent solenoid. If no problems are found, the mechanic will then use a scan tool to check the PCM for codes.

Repair

Once the cause of Engine Code P0442 has been diagnosed, the mechanic will be able to make the necessary repairs. This may involve replacing a faulty part, repairing a leak, or clearing a code from the PCM.

Prevention

There are a few things you can do to help prevent Engine Code P0442, including:

Keeping the gas cap tightly closed
Avoiding driving over bumps or potholes
Repairing any leaks in the fuel system
Inspecting the EVAP system regularly

Conclusion

Engine Code P0442 is a common problem that can cause a variety of symptoms. If you are experiencing any of these symptoms, it is important to have your vehicle diagnosed and repaired as soon as possible.

Also Read: What Is Engine Code P0455