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P0455ChryslerChrysler PlatformLow Severity

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).

DIY Parts Estimate
$15 - $250 (DIY: $15 - $50)
Chrysler OEM Direct Fit
Shop Labor Quote
$180 – $380
Based on $120/hr labor
Drivability Status
Drivable (Short Trip)
Low urgency level
Est. DIY Time
45 – 90 Min
Basic hand tools
Check P0455 On Another Make:
ToyotaBMWMercedes-BenzLexusFordHyundaiCadillacTeslaChevroletHonda

1. Symptoms of P0455 on Chrysler

When the Engine Control Module (ECM/PCM) on your Chrysler logs fault code P0455, drivers commonly observe:

Check Engine Light on on Chrysler (Pacifica, Pacifica Hybrid)
Gas cap loose warning message on dashboard on Chrysler (Pacifica, Pacifica Hybrid)
Slight fuel vapor odor near rear of vehicle on Chrysler (Pacifica, Pacifica Hybrid)

2. Most Likely Causes on Chrysler

Historical warranty claims and technical repair bulletins for Chrysler point to the following failure distribution:

55%
Missing, loose, or cracked gas cap seal (Chrysler OEM Part)
25%
Faulty EVAP purge control solenoid (Chrysler OEM Part)
12%
Stuck open EVAP vent valve (Chrysler OEM Part)
8%
Cracked EVAP charcoal canister vapor hose (Chrysler OEM Part)

3. Step-by-Step DIY Repair Guide for Chrysler

01
Inspect and Tighten the Gas Cap

Remove gas cap, inspect rubber O-ring for cracks, tighten until it clicks 3 times. on Chrysler vehicles (Pacifica, Pacifica Hybrid).

Required Tool: None
02
Replace Gas Cap with OEM Replacement

If the cap rubber is dried or cracked, replace with genuine OEM cap ($15). on Chrysler vehicles (Pacifica, Pacifica Hybrid).

Required Tool: New OEM Gas Cap
03
Test EVAP Purge Solenoid Under Hood

Disconnect electrical plug and vacuum hose. Apply 12V; verify valve seals tight when unpowered. on Chrysler vehicles (Pacifica, Pacifica Hybrid).

Required Tool: 12V Probe, Vacuum Pump
04
Inspect EVAP Canister Vent Valve Near Gas Tank

Check vent valve for road salt corrosion or spider nest clogs. on Chrysler vehicles (Pacifica, Pacifica Hybrid).

Required Tool: Flashlight, Jack Stands
05
Smoke Test EVAP System

Pump mineral oil smoke into EVAP port to reveal any hairline cracked lines. on Chrysler vehicles (Pacifica, Pacifica Hybrid).

Required Tool: EVAP Smoke Machine

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 much does it cost to fix P0455 on a Chrysler?

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.