What Is P2015?
P2015 is stored when the ECU detects that the intake manifold runner position sensor is giving a signal outside the expected range. This sensor monitors the position of the runner control flaps and feeds back to the ECU to confirm the flaps are moving as commanded.
P2015 is very common on VW/Audi group vehicles fitted with the 2.0 TDI engine, but also appears on BMW, Ford, and Vauxhall engines. The fault is often caused by the position sensor itself failing, but seized flaps that prevent movement (causing the sensor to read a stuck position) are equally common.
Common Symptoms
- Engine management light on
- Rough idle or hesitation
- Reduced performance at low revs
- Possible limp mode
- Poor fuel economy
- Black smoke on some diesels
Common Causes
How to Diagnose P2015
Check Live Sensor Data
Connect an OBD scanner and monitor the IMRC position sensor value in live data. Rev the engine from idle to high revs — the value should change smoothly. A fixed or erratic reading confirms a sensor or mechanical fault.
Inspect the Position Sensor
Locate the IMRC position sensor on the intake manifold. Check for physical damage, cracks in the sensor body, and a secure connector. On VW 2.0 TDI, the position sensor is integrated into the IMRC actuator assembly.
Check Sensor Wiring
Test the signal wire voltage with the ignition on. The reference voltage should be 5V. Test continuity of each wire back to the ECU. Corroded or damaged wiring is common on engines with high heat exposure.
Test Flap Movement
Manually operate the IMRC linkage by hand. It should move smoothly through its full range. If stiff or seized, carbon deposits are restricting movement — the sensor reports the correct position but the flaps cannot reach it.
Clean or Replace Manifold
On carbon-seized units, the manifold needs professional cleaning or replacement. Simply replacing the sensor on a seized manifold will not resolve the fault.
Replace Position Sensor/Actuator
If the flaps move freely but live data shows an incorrect sensor reading, replace the position sensor or the actuator assembly (on vehicles where they are integrated).
Verdict
Check live sensor data first to distinguish a position sensor failure from a mechanically seized flap. On VW 2.0 TDI, the revised actuator assembly is the recommended fix.
