The p0455 is more than likely due to a faulty/loose/missing gas cap. The p1489 & 1490 are pointing to the low&High speed fan relays, however it is very uncommon that these 2 relays go at the same time, and is more likely a result of a faulty Pulse Width Modulated (PWM) cooling fan relay which controls both Low&High speed relays. Jeep Grand Cherokee & Commander Forums. WJ Grand Cherokee Forum. Evap CEL codes. P0442 & P0455. Jump to Latest Follow 1 - 6 of 6 Posts. D. Dlav1997 · Registered P0455 EVAP system leak code Our Jeep Grand Cherokee SRT8 Forum is a community dedicated to Jeep enthusiasts to discuss specs, horsepower, reviews and more! 04 grand cherokee larado special edition no lock at hatch or passenger door wont start after removing battery 1 chip key doors lock w/auto except driver dr i know nothing about modifications etc. Does anyone know the exact location of keyless entry receiver on 04 jeep 4.0l grd. cherokee. P0135 is a very common OBDII code that occurs in the Jeep Grand Cherokee. It is caused by a failure in one of the oxygen sensors heated elements, specifically bank 1 sensor 1. It technically stands for: P0135: Heated Oxygen Sensor → Sensor Heater Circuit Malfunction → Bank 1, Sensor 1. 61 posts · Joined 2009. #1 · Apr 9, 2022. So, as the title states, I'm chasing a P0455 code on my 2006 Commander 3.7 V6. It started in December of 2021 after striking a metal Pipe on the Highway, causing a blowout (amongst other issues) of 2 Tires on the Drivers side. I changed the gas cap, smoked the evap ports, and visually checked all Read Also: P0455 Jeep Wrangler Code: Read Also: How To Troubleshoot & Fix P0456 Jeep Grand Cherokee Code? Categories Jeep Guides. Search. Search. Recent Posts. A P0841 code doesn’t necessarily indicate a problem with a specific transmission fluid sensor. Other factors may cause the PCM to store this code. For an accurate diagnosis, make sure to check all the parts in your circuit. The following are possible causes of the P0841 code: Open in the signal circuit The P0455 Jeep code occurs when the PCM detects a large EVAP leak. Symptoms include an illuminated CEL, subpar engine performance, stalling, and excessive exhaust smoke (among others). A malfunctioning gas cap or a defective emissions control system component can cause the fault code. We are having same issues with a 2002 Jeep Grand Cherokee Limited we purchased a couple months ago. The only difference is it's not at any RPM exactly but it's at the higher speed of 55+MPH. Random misfire with same codes p0300, p0302, 303, 304, and 306. also pO455. Random misfire code and 4 cylinder misfires. wbew.