Question about Jeep Cars & Trucks
Code p0440 comes up on scan tool how to fix?
No jeep or year stated, are you kidding? nor engine option.
x3 hard failure....!!! strike 3 your out? nah. ill try.
ok, millions of folks now have posted 440, to the net.
you can google it ,or read the FSM. I cant help with no year/engine or body, you never said what body car is, wrangler, GC ? what?
440 the is a federal USA standard code P0 means that.
440 is EVAP errors (gas tank venting tests failed, bar stool answer)
why not do as all others do with out the fancy EVAP tests system.
(i built my own)
1: tighten the gas cap , reset the DTCs with the scan tool button and drive and hope it dont come back, millions served !
2: panic, (i would) and buy a new real jeep spec,.gas cap. bingo.?
3: read the fsm;. on EVAP check all hoses for fell off and cracks
its all here if lucky (no year or car stated)
lots more can be bad. lots of test. the first it to find which path is leaking or if the check circuits are bad.
Posted on Feb 11, 2014
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Posted on Jan 02, 2017
On a domestic car using a scan tool, the trouble code p0440 is an Evaporative Emission Control System Malfunction. It can mean the gas cap is not installed or working right, the purge solenoid has failed, or the canister is plugged and not working right.
Posted on Oct 29, 2012
Tips for a great answer:
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5.Connect the new EVAP vent solenoid harness (3), P/N 22687059, to the EVAP vent solenoid (2), route the harness above the rear ABS harness (4) and connect the EVAP vent solenoid harness (3) to connector C313 (1).
6.Lower the vehicle.
7.Clear the DTC's with the Tech 2 scan tool.
If all of the wires are good you will want to check for any leaks in the evap system.
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