What does code P0440 mean on a Pontiac and is it safe to drive?
P0440: Evaporative Emission System Control System Malfunction. Here's what it means on your Pontiac, what usually causes it, what repairs typically cost, and how safe it is 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 for your 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 Pontiac, repairs for P0440 often fall between $20 and $400, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
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