Diagnosing P0455 on Your 2019 Jeep Cherokee
P0455 on your 2019 Cherokee KL means a large EVAP leak. This refreshed Cherokee with the 2.4L or 2.0L turbo is out of basic warranty but emissions coverage may apply. Start with the gas cap.
Symptoms
- Check engine light with P0455
- Fuel smell possible
- Gas cap worn after 5+ years
- Emissions test failure
Causes Ranked
- Gas Cap Seal (Very High Likelihood): Degraded with age. $10–$25.
- EVAP Canister Vent Valve (Medium Likelihood): FCA vent valve. $150–$280 installed.
- Purge Solenoid (Medium Likelihood): Age-related failure. $140–$260 installed.
- Vapor Line (Low-Medium Likelihood): Heat or impact damage. $100–$220.
- Charcoal Canister (Low Likelihood): Saturated. $200–$380 installed.
DIY vs. Shop
Gas cap replacement is easy DIY. The vent valve and purge solenoid are moderately accessible. Smoke testing requires professional equipment—expect $80–$150 at an independent shop.
Warranty
Basic warranty has expired. Federal emissions warranty (8yr/80k) covers EVAP through 2027.
Safe to Drive?
Yes. P0455 is a vapor code only. Engine, transmission, 4WD all unaffected.