Code
P2589
LAND ROVER
P — Powertrain
Turbocharger B boost control position sensor - circuit high
Views:
UK: 10
EN: 20
RU: 12
AI status
Completed
Completed
100%
Causes
- Open/shorted or damaged wiring harness to the boost control position sensor (short to battery/ignition)
- Faulty boost control position sensor (potentiometer/Hall sensor)
- Poor or corroded connector or terminal at the sensor or ECM
- Failed ECM (rare)
- Stuck or mechanically binding turbo actuator/valve causing abnormal sensor behavior
- Incorrect supply/reference voltage to the sensor (5 V reference fault) or lost ground
Symptoms
- Check Engine Light (MIL) with P2589 stored
- Reduced engine power or limp-home mode
- Erratic boost control, poor turbo response or turbo overboost/underboost
- Decreased fuel economy and drivability issues
- Possible audible turbo/actuator anomalies
What to check
- Read freeze frame and live data with a capable scan tool; note boost control position sensor voltage/percentage and related turbo actuator positions
- Visually inspect wiring and connectors at the sensor and along the harness to the ECM for damage, pin corrosion, or melted insulation
- Backprobe sensor connector and verify reference voltage (usually ~5 V) with ignition ON
- Verify good ground at the sensor connector and continuity to chassis/ECM ground
- Measure sensor signal voltage with key ON/engine OFF and while moving actuator if accessible
- Wiggle test harness while monitoring live data to check for intermittent faults
Signal parameters
- Typical position sensor signal: approximately 0.5–4.5 V across travel (varies by design); exact range depends on vehicle calibration
- Reference supply typically 5 V from ECM (verify 4.8–5.2 V with ignition ON)
- Signal short to battery may read near battery voltage (~12 V) or abnormally high relative to expected range
- Ground should be near 0 V; continuity to ECM ground should be near 0 Ω
Diagnostic algorithm
- Retrieve DTCs and freeze-frame data; note related codes (boost sensor, actuator, MAP/IAT) and operating conditions when code set.
- Perform visual inspection of sensor connector, wiring harness, and turbo actuator for damage, chafing, corrosion, or disconnection.
- With ignition ON (engine OFF), backprobe the sensor connector: verify reference (~5 V), signal voltage (should be within expected idle position range, typically 0.5–4.5 V), and ground continuity.
- If signal reads high (near battery voltage) suspect short to B+ — disconnect sensor and measure voltage at sensor harness connector. If high remains at harness, trace wiring for short to power or damaged insulation.
- If reference or ground missing, trace/repair wiring to ECM; check ECM pin voltages and grounds.
- Operate actuator manually (if serviceable) or command via diagnostic tool while monitoring sensor signal to confirm sensor output follows movement. Replace sensor if output does not change or stays high.
- Perform continuity/resistance checks between sensor pins and ECM pins to identify opens/shorts. Repair or replace damaged harness or connector as required.
- If wiring and sensor check good, consider replacing sensor. If fault persists after replacement, test ECM input for shorts or replace ECM only after thorough verification.
- Clear codes and perform road test/drive cycle to confirm repair and that P2589 does not return.
Likely causes
- Damaged wiring shorted to battery/ignition circuit or PIN
- Corroded/poor connector at sensor causing intermittent high readings
- Failed position sensor (internal short or drifting output)
- Mechanical binding or seized actuator causing sensor to be at extreme travel
- Less likely: ECM input driver fault
Fault status
Status
P2589 — Turbocharger B boost control position sensor circuit high. Sensor signal is higher than expected; possible short to battery, sensor failure, wiring/connector issue, or actuator problem.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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