Intake Manifold Runner Position Sensor Circuit Intermittent Bank 2
The P2023 code indicates an intermittent fault in the intake manifold runner position sensor circuit for bank 2. This sensor monitors the position of the intake manifold runner control (IMRC) flaps, which adjust air intake length for optimal performance. An intermittent signal suggests a loose connection, damaged wiring, or a failing sensor, potentially causing poor engine performance, reduced fuel economy, and increased emissions.
1. Most Common Causes
- High resistance, intermittent short to ground or voltage in the sensor circuit wiring or connectors
- Faulty or worn intake manifold runner control (IMRC) position sensor
- Stuck, broken, or intermittently failing IMRC actuator or intake manifold valves
- Corroded, bent, or loose connections in the sensor wiring harness
- Intermittent internal PCM failure (less common)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or hesitation during acceleration
- Poor fuel economy
- Rough idle or stalling
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the wiring and connector for the bank 2 intake runner position sensor for damage, corrosion, or loose connections.
Step 3: Test the sensor's resistance and voltage with a multimeter per manufacturer specifications.
Step 4: Check the IMRC flaps for carbon buildup or mechanical binding that could affect sensor readings.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with this code, as it can cause reduced engine performance and potential damage to the intake system. Have it diagnosed promptly.
How much does it cost to fix?▼
Repair costs typically range from $50 to $150 for diagnostic and sensor replacement, but may be higher if wiring repairs or intake cleaning are needed.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.