Intake Manifold Runner Position Sensor Circuit Low Bank 1
The P2016 code indicates that the Engine Control Module (ECM) has detected a low voltage signal from the intake manifold runner position sensor on bank 1. This sensor monitors the position of the intake manifold runner control (IMRC) flaps, which adjust air flow for optimal performance. A low circuit condition typically means the signal voltage is below the expected range, often due to a short to ground, faulty sensor, or wiring issues. This can cause poor engine performance, reduced fuel economy, and potential drivability problems.
1. Most Common Causes
- Short to ground in the sensor signal circuit wiring
- Open circuit or excessive resistance in the sensor wiring
- Faulty intake manifold runner position sensor
- Corroded, oxidized, or damaged pins in the sensor connector
- Internal failure of the intake manifold runner actuator (if sensor is integrated)
- Intermittent or out-of-spec reference voltage from the ECM/PCM
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or hesitation
- Poor fuel economy
- Rough idle or stalling
- Possible engine misfire
3. Step-by-Step Diagnosis
Step 1: Connect an OBD2 scanner and verify the code P2016. Check for any additional codes.
Step 2: Visually inspect the wiring and connector for the intake manifold runner position sensor on bank 1 for damage, corrosion, or loose connections.
Step 3: Using a multimeter, test the sensor's reference voltage (typically 5V) and ground. Check the signal wire for voltage while manually operating the IMRC linkage.
Step 4: If voltage is low or absent, isolate the circuit by disconnecting the sensor and checking for shorts to ground or open circuits.
Step 5: If wiring is intact, replace the intake manifold runner position sensor and clear the code. Test drive to confirm repair.
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 manifold runner control system. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
The cost to fix P2016 typically ranges from $50 to $150 for parts and labor, depending on the vehicle and whether the sensor or wiring needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.