![]() It means “Evaporative Emission Control System (EVAP) – Gross/Large Leak Detected,” read via an OBD-II diagnostic scan tool. What the P0455 Code Meansĭiagnostic Trouble Code P0455 is an error concerning an issue with your vehicle’s emission control system. More serious faults, such as a defective Leak Detection Pump or FTP sensor, sticky purge valve solenoid, or a failing PCM, can also give rise to this trouble code.Ĭontinue reading this article if you want to learn more about the causes and symptoms of a P0455 Jeep code and how to resolve them. A malfunctioning gas cap or a defective emissions control system component can cause the fault code. Symptoms include an illuminated CEL, subpar engine performance, stalling, and excessive exhaust smoke (among others). The P0455 Jeep code occurs when the PCM detects a large EVAP leak. An unattended EVAP leak can lead to hefty repair costs and poor vehicle performance. Many drivers often dismiss it due to its low drivability impact. Unfortunately my CO-worker's vehicle cannot pass inspection with the light on and the dealer cannot diagnose the problem.Disclosure: We may get commissions for purchases made through links in this post.Ĭode P0455 is a fault code usually found in sedans, SUVs, and even luxury vehicles. The vehicle has been back to the dealer on numerous occasions and the cause has yet to be discovered. A CO-worker has a 2002 Grand Cherokee and the mil comes on intermittently. In addition, the dealerships are profiting by repairing these weak components at the owners expense. These evaporative leaks present a danger to the vehicle operators (escaping gas fumes) and the environment. I believe the emission system components on these vehicles are weak. Since this emission component was no longer under warranty the repair cost of $293. A leak from a vapor hose was the cause this time. ![]() This time the dtc was p0456 - small leak from the evaporative system. On 8/19/08 (mileage 21,351) the vehicle was again returned to the dealer because the mil was on. A leak was found at the fuel pump seal and was replaced under warranty by the dealer. ![]() ![]() The diagnostic trouble code (dtc) was p0455 - large leak from the evaporative system. On 12/23/06 (mileage 11,948) my vehicle was returned to the dealer because the engine malfunction indicator light (mil) had illuminated and remained on after several normal driving cycles. ![]()
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