Intake Manifold Runner Position Sensor/Switch Circuit Bank 2
The P2019 code indicates the engine computer detected an issue with the intake manifold runner position sensor or switch circuit on Bank 2. This sensor monitors the variable intake manifold runner valve position, which optimizes engine performance across different RPM ranges. When the circuit fails or the valve sticks, the engine cannot properly adjust intake flow, resulting in reduced performance and efficiency.
What You Might Notice
- Check Engine Light illuminated
- Lack of engine power and acceleration
- Occasional misfires during operation
- Reduced fuel economy
- Rough idle or stumbling
Most Common Causes
- 1
Sticking or faulty IMRC valve (Bank 2)
The intake manifold runner control valve on Bank 2 becomes stuck due to carbon buildup or mechanical wear, preventing proper position changes and triggering the fault code.
- 2
Faulty IMRC actuator or position sensor
The actuator that moves the IMRC valve or the sensor that detects its position fails electrically or mechanically, breaking communication with the PCM.
- 3
Sticking or faulty throttle body
Throttle plates accumulate carbon deposits or develop mechanical faults that interfere with proper intake manifold operation and sensor readings.
- 4
Faulty Powertrain Control Module (PCM)
Rarely, the PCM itself may malfunction and fail to properly interpret or control the IMRC circuit, though this is uncommon as a primary cause.
How to Diagnose It
- 1
Check Sticking or faulty IMRC valve (Bank 2) — The intake manifold runner control valve on Bank 2 becomes stuck due to carbon buildup or mechanical wear, preventing proper position changes and triggering the fault code.
- 2
Check Faulty IMRC actuator or position sensor — The actuator that moves the IMRC valve or the sensor that detects its position fails electrically or mechanically, breaking communication with the PCM.
- 3
Check Sticking or faulty throttle body — Throttle plates accumulate carbon deposits or develop mechanical faults that interfere with proper intake manifold operation and sensor readings.
- 4
Check Faulty Powertrain Control Module (PCM) — Rarely, the PCM itself may malfunction and fail to properly interpret or control the IMRC circuit, though this is uncommon as a primary cause.
How to Fix It
- 1
Clean or replace IMRC valve and actuator
Remove the intake manifold runner control valve assembly and clean it thoroughly with carburetor cleaner to remove carbon buildup. If cleaning does not resolve the issue or the valve is damaged, replace the IMRC valve and actuator assembly.
- 2
Replace IMRC position sensor
Test the position sensor with a multimeter to confirm it is faulty, then remove and install a new sensor in the Bank 2 intake manifold runner assembly. Clear the code after replacement and test drive to verify.
- 3
Clean throttle body
Remove the throttle body and clean the throttle plates and intake ports with carburetor cleaner to remove carbon deposits that may be affecting sensor readings and valve operation.
- 4
Check wiring and connectors
Inspect the wiring harness and electrical connectors to the IMRC valve and sensor for corrosion, loose connections, or damage. Repair or replace damaged wiring and reseat all connectors firmly.
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