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P2016 — Intake Manifold Runner Position Sensorswitch Circuit Low Bank 1

Manufacturer-specificPowertrain (engine & transmission)

P2016 indicates a low voltage condition in the intake manifold runner position sensor circuit on bank 1. The PCM detects that the sensor signal is below the expected range, suggesting a problem with the sensor, its wiring, or the circuit.

Symptoms

What causes it — most likely first

1. Faulty runner position sensor

The sensor itself has failed or is providing a weak signal, causing the low voltage reading.

2. Damaged or corroded wiring/connectors

Open circuits, corrosion, or broken wires in the sensor harness can drop voltage below the sensor's normal range.

3. Intake manifold runner actuator mechanical binding

A stuck or seized runner can cause the sensor to read an abnormal position, resulting in a low signal.

4. Voltage supply issue (e.g., blown fuse or bad relay)

A missing or low supply voltage to the sensor circuit can produce a low reading even if the sensor is good.

5. PCM internal fault (rare)

Only after all other possibilities are eliminated should a PCM input circuit failure be considered.

How it's diagnosed

  1. Verify the stored code and any related codes with a scan tool; clear the code and see if it returns.
  2. Inspect the runner position sensor wiring and connectors for damage, corrosion, or looseness; repair as needed.
  3. Measure sensor voltage reference and signal voltage while the engine is running; compare to manufacturer specifications.
  4. Test the sensor resistance and continuity according to service data; replace the sensor if out of spec.
  5. If the sensor and wiring test good, inspect the runner actuator for mechanical binding and test the PCM input circuit for proper voltage.

Code facts & related codes

SystemPowertrain (engine & transmission)
StandardizationManufacturer-specific (P1/B1/C1/U1)
Related codesP2010 — Intake Manifold Runner Control CircuitP2011 — Intake Manifold Runner Control CircuitP2012 — Intake Manifold Runner Control CircuitP2013 — Intake Manifold Runner Control CircuitP2014 — Intake Manifold Runner Position SensorP2015 — Intake Manifold Runner Position Sensor

Frequently asked

Can the PCM be the cause of a P2016 code?

It is possible but extremely uncommon. Most P2016 diagnoses are resolved by addressing the sensor, wiring, or mechanical runner issues before considering a PCM fault.

Do I need to replace the intake manifold to fix P2016?

Usually not. The code typically relates to the runner position sensor or its circuit, not the entire manifold. Only replace the manifold if it is physically damaged or the runner actuator cannot move.

Will resetting the code without fixing anything clear the problem?

Clearing the code may turn off the Check Engine Light temporarily, but the code will likely return if the underlying fault (sensor, wiring, or actuator) remains.

Is it safe to drive with a P2016 code active?

The vehicle will generally run, but you may experience reduced performance, poor fuel economy, and possible emissions failure. It is advisable to diagnose and repair the issue promptly.