P0455 on Chrysler Pacifica: Symptoms, Causes & DIY Fix
Official technical diagnostic wire for fault code P0455 (P0455: Evaporative Emission Control System Leak Detected (Gross Leak)) specifically affecting Chrysler Pacifica vehicles equipped with 3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV.
1. Symptoms of P0455 on Chrysler Pacifica
When the Engine Control Module (ECM/PCM) on your Chrysler Pacifica (3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV) logs fault code P0455, drivers commonly observe:
2. Most Likely Causes on Chrysler Pacifica
Historical warranty claims and technical repair bulletins for Chrysler Pacifica point to the following failure distribution:
3. Step-by-Step DIY Repair Guide for Chrysler Pacifica
Remove gas cap, inspect rubber O-ring for cracks, tighten until it clicks 3 times. on the Chrysler Pacifica equipped with 3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV.
If the cap rubber is dried or cracked, replace with genuine OEM cap ($15). on the Chrysler Pacifica equipped with 3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV.
Disconnect electrical plug and vacuum hose. Apply 12V; verify valve seals tight when unpowered. on the Chrysler Pacifica equipped with 3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV.
Check vent valve for road salt corrosion or spider nest clogs. on the Chrysler Pacifica equipped with 3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV.
Pump mineral oil smoke into EVAP port to reveal any hairline cracked lines. on the Chrysler Pacifica equipped with 3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV.
4. Chrysler Pacifica P0455 FAQs
What causes code P0455 to trigger on a Chrysler Pacifica?
On the Chrysler Pacifica (3.6L Pentastar V6 (287HP) / 3.6L Plug-In Hybrid eFlite EV), P0455 is most frequently caused by Missing, loose, or cracked gas cap seal or Faulty EVAP purge control solenoid. Factory sensor degradation or wiring harness wear near the engine bay are common factors.
Can I safely drive my Chrysler Pacifica with code P0455?
Yes. Completely safe to drive, but emissions test will fail. Given that P0455 carries a Low severity rating on Chrysler vehicles, we advise performing diagnostic scanning via the OBD-II port located beneath driver steering column bezel before extended highway driving.
Where is the diagnostic port located on the Chrysler Pacifica?
The 16-pin OBD-II DLC connector on the Chrysler Pacifica is situated beneath driver steering column bezel. It requires no special tools to plug in a standard scanner.
How much does it cost to fix P0455 on a Chrysler Pacifica?
DIY replacement parts typically range between $15 - $250 (DIY: $15 - $50). If serviced at an authorized Chrysler dealership, expect an additional $120–$250 in professional labor based on their $120/hr hourly rate.