Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 10 (ENGINE CONTROLS - BASIC DIAGNOSTIC PROCEDURES - 4-CYLINDER)FUEL SYSTEMSFUEL SYSTEM PRESSURE RELEASECAMRY
2004 Toyota Celica GT, Standard
Fuel System Pressure Release: Camry
2004 Toyota Celica GT, StandardSECTION Camry
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Toyota Tacoma, 2002 Toyota RAV4, 2002 Toyota Prius, 2002 Toyota MR2, and 2002 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
- Ensure ignition is off. Remove circuit opening relay from fuse/relay box. See Figure. Fuse/relay box is located at driver's side front corner of engine compartment.
- Start engine and allow engine to idle until engine stalls. Attempt to start engine again to ensure engine will not start. Turn ignition off. Disconnect negative battery cable. Remove fuel tank cap to release any pressure from fuel tank.
- Place suitable container under fuel line connection. Cover fuel line connection with shop towel. Slowly loosen or disconnect fuel line connection, allowing fuel pressure to be released. Once fuel pressure is released, fuel system components may be serviced.
- Reinstall circuit opening relay and negative battery cable. Start engine and check operation of Malfunction Indicator Light (MIL) on instrument panel with engine running. MIL is displayed as engine icon on instrument panel. It may be possible that Diagnostic Trouble Code (DTC) P0171 may have been stored in Engine Control Module (ECM) and MIL may be illuminated with engine running due to the lean condition caused by operating engine with circuit opening relay removed. If MIL is illuminated, DTCs must be cleared from ECM. See CLEARING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM in appropriate SELF-DIAGNOSTICS article.NOTE: It may be possible that power sun roof may not operate properly after battery was disconnected. If power sun roof does not operate properly, perform appropriate power sun roof reinitialization procedure. See appropriate POWER SUN ROOF REINITIALIZATION PROCEDURE under PROGRAMMING.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.