P0455 on Chrysler: Symptoms, Causes & DIY Fix
Official technical diagnostic wire for fault code P0455 (P0455: Evaporative Emission Control System Leak Detected (Gross Leak)) specifically affecting Chrysler vehicles (Pacifica, Pacifica Hybrid, 300).
1. Symptoms of P0455 on Chrysler
When the Engine Control Module (ECM/PCM) on your Chrysler logs fault code P0455, drivers commonly observe:
2. Most Likely Causes on Chrysler
Historical warranty claims and technical repair bulletins for Chrysler point to the following failure distribution:
3. Step-by-Step DIY Repair Guide for Chrysler
Remove gas cap, inspect rubber O-ring for cracks, tighten until it clicks 3 times. on Chrysler vehicles (Pacifica, Pacifica Hybrid).
If the cap rubber is dried or cracked, replace with genuine OEM cap ($15). on Chrysler vehicles (Pacifica, Pacifica Hybrid).
Disconnect electrical plug and vacuum hose. Apply 12V; verify valve seals tight when unpowered. on Chrysler vehicles (Pacifica, Pacifica Hybrid).
Check vent valve for road salt corrosion or spider nest clogs. on Chrysler vehicles (Pacifica, Pacifica Hybrid).
Pump mineral oil smoke into EVAP port to reveal any hairline cracked lines. on Chrysler vehicles (Pacifica, Pacifica Hybrid).
P0455 Guides by Chrysler Model
Select your specific Chrysler model below for exact OBD-II DLC port locations, wiring diagrams, and engine displacement specs:
Other Common Diagnostic Codes on Chrysler
Troubleshoot other high-frequency Check Engine Light fault codes reported across Chrysler vehicles:
4. Chrysler P0455 FAQs
What causes code P0455 to trigger on a Chrysler?
On Chrysler vehicles, 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 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 before extended driving.
How is code P0455 diagnosed and resolved on a Chrysler?
Diagnosis begins by connecting a scan tool to the 16-pin DLC port, verifying freeze-frame telemetry (SAE J1979 Mode $02), testing circuit continuity with a digital multimeter, and replacing worn sensors or repairing wiring according to OEM specifications.