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 intake length 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.
01. Most Common Causes
- Faulty intake manifold runner position sensor
- Short to ground in sensor circuit wiring
- Corroded or damaged connector
- Failed ECM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- 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 related codes.
Step 2: Visually inspect the sensor connector and wiring for damage or corrosion.
Step 3: Test the sensor signal voltage with a multimeter; should be 0.5-4.5V with key on.
Step 4: Check for a short to ground by disconnecting the sensor and measuring resistance to ground.
Step 5: If wiring and sensor are good, test ECM output voltage at the sensor connector.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause reduced performance and potential engine damage. Short trips to a repair shop are okay.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and sensor replacement, but can be higher if wiring repairs are needed.