Q: P0442-EVAP System leak detected

asked by on

My car won't pass a smog check due to a P0442-EVAP System leak detected.

Hi. The evaporative emissions (EVAP) system is used to prevent fuel vapor from escaping into the atmosphere. Code P0442 stands for EVAP system small leak detected. The cause of this code can be difficult to diagnose. It could be triggered by a tiny leak the size of a pinprick. A trained technician will use an EVAP leak detector to find the source. This device puts smoke in the system to reveal the leak.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. P0442-EVAP System leak detected

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: How do I safely park while towing a trailer?

Parking your car with a trailer attached can be tricky. It’s not as simple as finding a spot and putting the car in park. You need to follow a few important steps: Find a parking spot long enough to...

Q: 04 f250 was in gear An someone drug it from behind up a hill. Tires were locked An then broke lose at the end. Transmission?

If the vehicle was dragged with the transmission in park then it most likely damaged the internal gears or parking lock inside transmission. You will need to get the vehicle to start to see if the transmission was damaged internally....

Q: What features are customizable?

Like many other cars today with advanced electronic systems, your car can be customized in a number of ways. However, this customization cannot be done “at home” and will require a professional. Here’s a quick look at what can be...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...