Land Rover OBD-II Trouble Codes
-------------------------------------------------The diagnostic trouble codes (DTCs) P2014 and P2015 both relate to issues with the Intake Manifold Runner Position Sensor/Switch on Bank A. Here's a breakdown of each code:
Intake Manifold Runner Position Fault,
Bank 1 Variable Tumble Control,
Swirl Control Valve Performance,
IMRC Sensor Circuit Range,
Bank A Runner Position Implausible,
Diagnostic Overview
The System: The Intake Manifold Runner Control (IMRC) system uses "flaps" or "butterflies" inside the intake manifold to change the path of the air. At low speeds, they create "tumble" or "swirl" for better fuel mixing; at high speeds, they open wide for maximum power.
P2014 (Circuit Fault): This indicates an electrical issue with the sensor that tells the PCM where the flaps are. It usually means a broken wire, a short, or a disconnected plug.
P2015 (Range/Performance): This is the most common code. The PCM sees the sensor signal, but the value is outside the expected range (e.g., the motor tried to close the flaps, but the sensor says they are still 20% open).
Common Failure Points
Mechanical Obstruction: Carbon buildup (soot/oil) from the PCV and EGR systems can "glue" the flaps in place. When the actuator tries to move them, they stick, and the sensor reports a position error.
Broken Linkage: On many vehicles (especially older Audis, VWs, and Dodges), the plastic arm connecting the motor to the flaps snaps or pops off. The motor moves, but the flaps stay still.
Internal Sensor Failure: The sensor is often a potentiometer integrated into the actuator motor. If the internal wipers wear out, the signal becomes "noisy" or drops out.
The "Stop" Tab Wear: In many aluminum manifolds, the plastic flap hits a "stop" tab. Over time, the plastic wears down, allowing the flap to move too far, which the PCM interprets as a sensor out-of-range error (P2015).
Troubleshooting Steps
The Manual Movement Test: With the engine off, find the linkage arm and try to move it by hand. It should move smoothly without binding. If it’s stuck, the manifold likely needs a "walnut blasting" or deep cleaning.
Visual Linkage Check: Have an assistant turn the key to "ON" (without starting). Most cars will "cycle" the IMRC flaps as a self-test. Watch to see if the motor and the linkage actually move.
Resistance Test: Check the 3-pin connector. You should have a 5V reference, a ground, and a signal return. If the signal return stays at a fixed voltage while you manually move the flaps, the sensor is dead.
P2015 "Repair Bracket": For certain VW/Audi 2.0T engines, you don't need a new manifold. There are small metal brackets available that physically limit the flap travel, correcting the "out of range" signal.
Would you like me to find the specific "flap relearn" procedure or check if there is a known TSB (Technical Service Bulletin) for your specific engine?
P2015 Intake Manifold Runner Position Sensor Diagnosis
This video shows how to identify if the P2015 code is caused by a broken plastic linkage or if the internal electronic sensor has failed.
1. **P2014 - Intake Manifold Runner Position Sensor/Switch Circuit Bank 1:**
- This code indicates a malfunction in the circuit of the Intake Manifold Runner Position Sensor/Switch on Bank A. It may be caused by issues with the sensor, wiring, or connectors.
2. **P2015 - Intake Manifold Runner Position Sensor/Switch Range/Performance Bank 1:**
- P2015 points to a range or performance issue with the Intake Manifold Runner Position Sensor/Switch on Bank A. This can involve problems with the sensor's readings or the performance of the component.
### Possible Causes:
1. **Faulty Intake Manifold Runner Position Sensor/Switch:** Issues with the sensor or switch itself, such as wear, damage, or electrical malfunctions.
2. **Wiring Issues:** Problems with the wiring connected to the Intake Manifold Runner Position Sensor/Switch, including damage, corrosion, or poor connections.
3. **Connector Problems:** Faulty connectors or terminal issues in the wiring harness related to the Intake Manifold Runner Position Sensor/Switch.
4. **Mechanical Issues:** Physical problems with the intake manifold runner system that may affect the sensor's readings.
### Diagnostic Steps:
1. **Inspect Intake Manifold Runner Position Sensor/Switch:** Check the sensor or switch for signs of damage or wear. If it appears faulty, consider replacement.
2. **Check Wiring and Connectors:** Inspect the wiring and connectors associated with the Intake Manifold Runner Position Sensor/Switch. Look for any signs of damage, corrosion, or loose connections.
3. **Test Sensor/Switch Operation:** Use a multimeter or diagnostic tool to test the operation of the Intake Manifold Runner Position Sensor/Switch. Check for proper resistance or voltage readings.
4. **Verify Mechanical Integrity:** Ensure that the intake manifold runner system is mechanically sound, without any obstructions or issues that could affect the sensor's readings.
5. **Perform Continuity Tests:** Check for continuity in the wiring from the sensor to the Engine Control Module (ECM).
6. **Check for Reference Voltage:** Verify that the sensor is receiving the appropriate reference voltage from the ECM.
7. **Clear Codes:** After addressing any identified issues, clear the trouble codes and monitor the system for recurrence.
8. **Consider Professional Assistance:** If you are unsure about diagnosing or addressing these issues yourself, or if the faults persist, it's advisable to consult with a qualified mechanic or technician.
Addressing the root cause of the Intake Manifold Runner Position Sensor/Switch faults is crucial for proper engine performance. If in doubt or if the faults persist, seeking professional assistance is recommended for a thorough diagnosis and effective repair.
