P0076 - INTAKE VALVE CONTROL SOLENOID CIRCUIT LOW (BANK 1)

On vehicles using the VVT system (Variable Valve Timing), the camshaft position is controlled by the vehicle computer. This is accomplished through the regulation of the engine oil using a control solenoid.

The control solenoid is commanded by a pulse width modulated signal from the PCM (Powertrain Control Module). This signal is monitored by the PCM itself and if it detects that the voltage is below the limits already set, the Check Engine light will illuminate along with the DTC P0076 OBDII code.

• MIL light on.
• Reduced fuel economy.
• Difficulties during acceleration.
• ECM triggers a safety mode until the regular voltage is detected again.

The factors for which the P0076 OBD2 fault code is set up are:

• Perhaps the wiring harness is shorted to the ground.
• The intake valve control solenoid may be shorted.
• Solenoid connection problems.
• Low engine oil level.
• PCM or software failure requiring an update.

To troubleshoot the faults related to the P0076 OBDII error code you should do the following:

• Unplug the connectors from the PCM harness. Then with a wiring diagram, locate the positive and negative wires of the solenoid. Check the power flow in the circuit. Then check with a voltmeter, the voltage on the positive lead and the negative lead of the solenoid. Also, test the power cable. Repair any circuit that does not meet the recommended specifications.
• Replace any damaged wires or connectors.
• Inspect the solenoid and verify that it is not shorted to the ground. Check with a meter for a good ground connection. If you get a low resistance, the solenoid is shorted. You will need to replace it.