Intake Manifold Tuning Valve Position Sensor Circuit Low Bank 2
The P207C code indicates that the Engine Control Module (ECM) has detected a low voltage signal from the Intake Manifold Tuning (IMT) valve position sensor on Bank 2. This sensor monitors the position of the IMT valve, which adjusts intake runner length to optimize engine performance across RPM ranges. A low circuit condition typically points to a short to ground, open circuit, or a faulty sensor. This can cause improper valve operation, affecting air intake and engine performance.
1. Most Common Causes
- Faulty IMT valve position sensor
- Short to ground in sensor circuit
- Open circuit in sensor wiring or connector
- Corroded or damaged connector pins
- Failed ECM (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or hesitation
- Poor fuel economy
- Rough idle or stalling
- Possible rattling noise from intake manifold
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect IMT valve actuator and wiring for damage or corrosion.
Step 3: Test sensor voltage reference (typically 5V) and ground at connector.
Step 4: Check sensor signal voltage with a scan tool while manually actuating the valve.
Step 5: If signal is low, disconnect sensor and check for short to ground in wiring.
Step 6: Replace sensor if circuit tests OK but sensor fails to produce correct voltage.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as reduced engine performance and potential stalling can occur. Immediate diagnosis is advised.
How much does it cost to fix?▼
Typical repair costs range from $50 to $150 for sensor replacement, plus diagnostic fees. Labor may add $50-$100 depending on vehicle.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.