P0076 Code - Intake Valve Control Solenoid Circuit Low Bank 1

What Does P0076 Mean?

Intake valve timing control solenoid valve is activated by ON/OFF pulse duty (ratio) signals from the Engine Control Module (ECM).

The intake valve timing control solenoid valve changes the oil amount and direction of flow through intake valve timing control unit or stops oil flow.

The longer pulse width advances valve angle. The shorter pulse width retards valve angle. When ON and OFF pulse widths become equal, the solenoid valve stops oil pressure flow to fix the intake valve angle at the control position.

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What are the common causes of P0076 ?

Probable causes include low engine oil level/pressure, a faulty control solenoid, faulty PCM, corroded, broken, or loose electrical wiring or connectors in the VVT electrical circuit.

What are the symptoms of P0076 ?

Symptoms may include:

• Check engine light illuminated (Malfunction indicator lamp)
• Vehicle may suffer from poor acceleration and decreased fuel economy.

How do you troubleshoot P0076 ?

Because this DTC references a circuit problem, you will use a DVOM to diagnose the problem. The main focus of your attention should be the circuit between the ECM and the VVT solenoid valve, as well as the solenoid valve itself.



Connector and Harness Check – Check that the VVT solenoid valve connector is good, no bent or backed-out pins, corrosion, or water entry. Make sure the connector is firmly seated. Check the wire harness for damage, chafing, exposed or broken wires. Repair as necessary.

Voltage Check – With the engine running, you should have a minimum 13.4 V at the battery. Backprobe the VVT solenoid valve, usually located in the cylinder head or valve cover, and check for battery voltage.

• If voltage is incorrect, suspect an open circuit between the ECM and the valve. Disconnect the connector and recheck for battery voltage. If incorrect, suspect an open circuit between the ECM and the valve. Inspect the wire harness and repair as necessary.
• If voltage is correct, suspect a ground problem. With the key off and engine off, disconnect the VVT solenoid valve connector and the ECM connector. From the VVT solenoid valve connector, check both pins for short to each other and short to ground. You should measure infinite resistance to ground and across the pins. If incorrect, suspect a short circuit. Repair as necessary.

VVT Solenoid Valve Check

• Check for resistance across the solenoid valve pins. You should measure between 5 Ω and 15 Ω, depending on manufacturer and temperature. Check your manual for the proper specification. If incorrect, replace the valve.
• Check for resistance from the pins to ground. You should measure infinite resistance to ground. If incorrect, replace the valve.

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