Intake Manifold Tuning Valve Control Circuit Low Bank 1

Where it lives

For P0661, the valve sits on the circuit this code reports. The description of P0661 puts it on bank 1.

Check these first

• A short to ground in the bank 1 tuning valve control wire
• A failed tuning valve actuator on bank 1
• Corrosion at the bank 1 tuning valve connector
• Chafed wiring on the bank 1 tuning valve circuit
• A faulty PCM output

What to do next

1. Check the tuning valve fuse on bank 1
2. Inspect the bank 1 tuning valve connector and control wire
3. Measure the control circuit voltage with the key on
4. Test the tuning valve actuator resistance
5. Repair the short if it is on the control wire
6. Clear the code and retest

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