Intake Manifold Tuning Valve Control Circuit/Open Bank 2
The P0663 code indicates a malfunction in the control circuit of the intake manifold tuning valve (IMTV) for Bank 2. This valve adjusts intake runner length to optimize airflow and engine performance. The PCM detects an open or short circuit in the valve's control circuit, often due to wiring issues, a faulty valve, or a PCM problem.
01. Most Common Causes
- Faulty intake manifold tuning valve (Bank 2)
- Open or shorted wiring/connector in the control circuit
- Corrosion or damage to electrical connectors
- 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 verify the code and check for other related codes.
Step 2: Visually inspect the wiring and connector for Bank 2 IMTV for damage, corrosion, or loose connections.
Step 3: Test the IMTV resistance with a multimeter (specs vary by vehicle; typically 20-30 ohms).
Step 4: Check for voltage and ground at the valve connector with the engine running.
Step 5: If wiring and valve are okay, test the PCM output or replace the PCM if necessary.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe for short distances, but reduced performance and fuel economy may occur. Prolonged driving could cause further issues.
How much does it cost to fix?▼
Repair costs range from $50 to $150 for DIY (valve replacement) to $200-$400 at a shop, depending on labor and parts.