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 MANUALSACURA2004TL AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISVTEC
2004 Acura TL Automatic
Testing & Diagnosis: VTEC
2004 Acura TL AutomaticSECTION VTEC
- Component Location Index
- DTC Troubleshooting
- Notes
- DTC P2646: Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Circuit Low Voltage (2004-2005 Models)
- DTC P2646: Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Circuit Low Voltage (2006 Model)
- DTC P2647: Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Circuit High Voltage (2004-2005 Models)
- DTC P2647: Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Circuit High Voltage (2006 Model)
- DTC P2648: Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit Low Voltage (2004-2005 Models)
- DTC P2648: Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit Low Voltage (2006 Model)
- DTC P2649: Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit High Voltage (2004-2005 Models)
- DTC P2649: Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit High Voltage (2006 Model)
- Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Test
- Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Replacement
- Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Removal/Installation
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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.