![]() ![]() Here are some of the more common causes of P0452 in the Jeep Grand Cherokee: Smell of fuel (indicates loose fuel cap or EVAP leak).Here are some of the more common symptoms that can arise with this code: More often than not, P0452 is not going to be accompanied by any noticeable symptoms, and your Grand Cherokee will continue to run fine. P0452 is more often than not caused by a bad gas cap P0452 should not be considered a breakdown risk when it is the only code that you are experiencing, and is more often than not remedied by a new fuel cap. When the pressure in the system is too low, P0452 is generated. The evaporative emissions control system (EVAP) sends fuel vapors from the fuel tank to the intake manifold to be burned off. It means that your Grand Cherokee’s EVAP system has detected low fuel tank pressure. P0452 is a generic OBD II code that can occur in the Jeep Grand Cherokee. To install, remaining components, reverse removal procedure. Rotate fuel filter/fuel pressure regulator to install fuel supply line. Install fuel filter/fuel pressure regulator into fuel pump module until it snaps into position. "O" rings will be damaged when installing assembly. DO NOT install "O" rings separately into fuel pump module. Apply a small amount of engine oil onto "O" rings. 29: Removing Fuel Pump Retaining Clamp (Cherokee & Wrangler) Courtesy of DAIMLERCHRYSLER CORPORATION Installation 1. 28: Locating Fuel Pump Module & Components (Cherokee & Wrangler) Courtesy of DAIMLERCHRYSLER CORPORATION Fig. If lower "O" ring is not on fuel filter/fuel pressure regulator fuel inlet tube, remove "O" ring from fuel inlet passage on fuel pump module. Ensure 2 "O" rings are still on fuel filter/fuel pressure regulator fuel inlet tube. Using 2 screwdrivers, pry fuel filter/fuel pressure regulator from gasket on fuel pump module. ![]() Remove retainer clamp from top of fuel filter/fuel pressure regulator. Remove fuel supply line from fuel filter/fuel pressure regulator. Note direction of fuel supply line in relation to fuel tank. Ensure area around fuel filter/fuel pressure regulator and fuel pump module is clean. Manufacturer recommends removing fuel tank for access to fuel filter/fuel pressure regulator. Fuel pump module is located on top of fuel tank. Fuel filter/fuel pressure regulator is mounted in gasket on top of fuel pump module. FUEL FILTER/FUEL PRESSURE REGULATOR Removal (Cherokee & Wrangler) 1. ![]()
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