Drive DTCP0442 – Small leak in the fuel vapour (EVAP) system
Evaporative emission system leak detected (small leak)
Emissions · generic OBD-II code
Normal driving is fine. Book it in when it suits you; it won't hurt anything in the meantime.
Check this first
Take the fuel cap off and put it back on until it clicks – then drive for a couple of days.
What usually fixes it
In the order a good shop checks them. Typical total: $36–$362 at $130 an hour.
Fuel cap
A worn seal or a cap left loose is the most common cause by far.
EVAP hose or seal
Cracked hoses and perished grommets leak vapour.
Purge or vent valve
A valve that doesn't seal holds the system open.
What the vehicle can tell you itself
A stored code is a headline, not the story. The vehicle also holds the conditions when it happened, how close the part is to the limit it fails at, what the fuel trims are doing, and whether the fault is still happening right now. Drive DTC reads all of it with a USB adapter and a Windows PC – and it can't change a single setting on the vehicle.
See what your vehicle says about P0442
Codes in plain English, what usually causes them, what the repair costs, and whether it's safe to drive.