2021 Pontiac P0440: What It Means & Is It Safe to Drive?
P0440 on the 2021 Pontiac: Evaporative Emission System Control System Malfunction. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
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What this code means
A general fault in the EVAP system—could be a leak, stuck valve, or sensor issue.
Common causes on the 2021 Pontiac
- Gas cap loose or faulty
- Purge or vent valve stuck
- Charcoal canister or hose leak
Symptoms
- Check Engine Light
Typical fixes
- Replace gas cap
- Test purge/vent valves
- Smoke test EVAP system
Repair cost range
For a 2021 Pontiac, repairs for P0440 typically fall between $20 and $400, depending on the root cause and labor rates in your area.
Known issues on Pontiac
Pontiac P0440 EVAP large leak is typically a gas cap or a cracked EVAP canister hose. These GM-based vehicles share the same EVAP architecture as Chevrolet Cobalt and Equinox. Purge solenoid hose inspection on the intake manifold is the first step after confirming the cap.
Most commonly affected models
G6 2005–2010Solstice 2006–2010Torrent 2006–2009