Intake Manifold Tuning Valve Control Circuit High Bank 2
The P0665 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in the control circuit of the intake manifold tuning valve on bank 2. This valve adjusts the intake runner length to optimize engine performance across different RPM ranges. A high voltage signal typically points to a short to power, open circuit, or faulty component in the valve control circuit.
01. Most Common Causes
- Faulty intake manifold tuning valve
- Short to power in the control circuit
- Open or damaged wiring/connector
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light on
- Reduced engine power or hesitation
- Poor fuel economy
- Rough idle or stalling
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm P0665 and check for other codes.
Step 2: Visually inspect the intake manifold tuning valve connector and wiring for damage, corrosion, or shorts.
Step 3: Test the valve resistance with a multimeter (compare to specs).
Step 4: Check for voltage at the valve connector with ignition on (should be battery voltage or signal).
Step 5: If wiring and valve are okay, test PCM output or replace PCM.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally not recommended to drive long distances as it can cause reduced performance and potential engine damage. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on whether the valve or wiring needs replacement. Parts cost around $30-$100.