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.
Possible Causes
| Possible Causes |
|---|
| INTERMITTENT DTC |
| ENGINE OIL DIRTY OR CONTAMINATED |
| INCORRECT ENGINE OIL VISCOSITY |
| (F343) FUSED MAIN RELAY OUTPUT CIRCUIT HIGH RESISTANCE |
| (K276) CMP 1/2 CONTROL CIRCUIT OPEN OR HIGH RESISTANCE |
| CAMSHAFT 1/2 POSITION SOLENOID/OIL CONTROL VALVE |
| CAMSHAFT 1/2 PHASER |
| POWERTRAIN CONTROL MODULE (PCM) |
Perform PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .
Dual Variable Valve Timing (VVT) allows the PCM to monitor and adjust the position of each camshaft, based on desired torque levels and engine operating conditions. The PCM controls two solenoid operated control valves, one for each camshaft, that are used to direct oil pressure to hydraulic actuators mounted between each camshaft and its driving sprocket. The oil pressure alters the angular position or phasing of each camshaft relative to crankshaft rotation. A sensor is used to monitor the position of each camshaft.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.