Code
P2022
Generic
P — Powertrain
Intake Manifold Runner Position Sensor/Switch Circuit High Bank 2
Views:
UK: 22
EN: 39
RU: 39
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring (short to battery/ignition 12V)
- Corroded, damaged or loose connector at the IMRP sensor
- Failed intake manifold runner position sensor/switch
- Poor or missing ground for the sensor circuit
- Intermittent contact from water/contaminants in connector
- ECM internal fault (rare)
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine Light
- Reduced engine power or limp-home mode on some vehicles
- Rough idle or hesitation during acceleration
- Reduced fuel economy and higher emissions
- Possible diagnostic trouble codes for related intake runner circuits
What to check
- Scan for stored/freeze-frame data and related DTCs
- Visually inspect sensor, harness, and connector for damage, corrosion, or pin push-out
- Backprobe sensor connector: check reference voltage (usually 5 V) and ground presence
- Measure sensor signal voltage with ignition on and engine running—look for open/short behavior
- Wiggle wiring and connector while monitoring live data for intermittent faults
- Check continuity between sensor signal pin and ECM pin, and check for short to battery voltage and short to ground
Signal parameters
- Typical system: 3-wire sensor — 5 V reference, signal (0–5 V), ground
- Normal signal range: approximately 0–5 V depending on position; high fault often >4.5 V or pegged near battery voltage
- If signal reads near battery voltage (~12 V) suspect a short to battery/ignition power
- If signal is open/high with no ground/ref present, suspect wiring/connection fault
Diagnostic algorithm
- Connect a professional scan tool, record freeze frame and any related codes (bank 1 runner codes, cam/crank errors, etc.).
- Visually inspect the bank 2 intake manifold runner sensor, connector, and wiring for damage, corrosion, or contamination.
- With ignition ON (engine off), backprobe the connector: verify the reference voltage (~5 V) and ground are present at the sensor harness.
- Measure the sensor signal wire voltage with ignition ON and engine running (or as specified). A constant high reading (>4.5 V) indicates a high/short to power or faulty sensor.
- Wiggle the harness and connector while observing live data to detect intermittent opens/shorts.
- Check continuity between the sensor signal pin and the ECM pin with the key OFF. Also check for continuity from the signal wire to battery positive (short to power) and to chassis ground (short to ground).
- If wiring and connector are good, substitute or bench-test the IMRP sensor/switch per manufacturer test procedure. Replace if out of spec.
- If sensor and wiring test good but fault persists, inspect the intake runner actuator mechanism for binding and verify the actuator position sensor operation.
- If all external tests pass, consider ECM diagnosis/repair as last resort.
- After repairs, clear codes and perform a road test and re-scan to confirm the fault does not return.
Likely causes
- Damaged wiring shorted to constant or switched 12 V (most common)
- Corroded/contaminated connector at the sensor
- Failed IMRP sensor/switch
- Bad sensor ground or poor pin contact
Fault status
Status
Intake manifold runner position sensor/switch circuit for bank 2 reports a high or over-range signal (voltage above expected range); possible short to battery or sensor/connector/wiring fault.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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