2009 Jeep P0440: What It Means & Is It Safe to Drive?
P0440 on the 2009 Jeep: 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 2009 Jeep
- 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 2009 Jeep, repairs for P0440 typically fall between $20 and $400, depending on the root cause and labor rates in your area.
Known issues on Jeep
Jeep P0440 on Grand Cherokee frequently traces to a cracked charcoal canister, which sits under the body and is prone to impact damage. TJ Wranglers commonly develop EVAP leaks from split vacuum hoses that become brittle with age.
Most commonly affected models
Grand Cherokee 2000–2004Cherokee XJ 1997–2001Wrangler TJ 1997–2006