What the dictionary says
EVAP System Leak Detected (small leak)
Source: generic entry in the MIT-licensed dtc-database · view source file
P0442 is a generic OBD fault code. The fault-code dictionary we use defines it as "EVAP System Leak Detected (small leak)". Below: the source entry, manufacturer entries, related codes and the terms explained.
Manufacturer entries in the dictionary
Audi
Defective or damaged fuel cap, Distorted or damaged Fuel Tank Filler Neck, Small tear or puncture in the Evaporative system hose(s) and or Carbon Canister, Defective Fuel Tank Sending Unit gasket or seal, Small split in a seam of the Carbon Canister, Defective Evaporative Vent Valve and or Evaporative Purge Valve, Defective or damaged Fuel Tank, Defective Fuel Tank Pressure Sensor, Defective Leak Detection Pump, Slightly loose and or worn clamps or hardened O-rings anywhere in the EVAP system
Source file · Listed as written in this source file. Not ranked; a workshop must confirm what applies to your car.
Dodge
Medium EVAP Leak
Source file · Listed as written in this source file. Not ranked; a workshop must confirm what applies to your car.
Reading the code P0442
- First character: P: Powertrain (engine, transmission and ignition)
- Second character: 0: a generic code defined by SAE, meant to mean the same thing on every make
- Last three characters: 442: The specific fault within that category.
Reference: On-board diagnostics (Wikipedia)
Terms in this code
- EVAP (evaporative emission) system: The system that stops fuel vapour from the fuel tank escaping into the air. More
Related codes
Singapore notes
LTA's periodic inspection checks a car's exhaust emissions and noise against the prevailing standards, as well as brakes, steering, lights and structure. Cars under 3 years old have no periodic inspection, cars aged 3 to 10 years are inspected every 2 years, and cars over 10 years every year. The dictionary does not say how this code affects an inspection, so ask the inspection centre or a workshop. LTA: vehicle inspection
Need a workshop? See workshops owners recommend or the Subaru list.
What this page does not tell you
The dictionary does not establish repair costs, how likely each cause is, or whether the car is safe to drive. Get a workshop diagnosis and a written quote before paying for parts.
For a make-specific answer, use the lookup below with your make and model. The dictionary has 93 Subaru-specific entries among 18,805 in total.