P1611

Code

LAND ROVER P — Powertrain

Malfunction of throttle actuator 1 Throttle malfunction

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 19 EN: 85 RU: 29

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Page language: EN

Causes

Faulty throttle body / throttle actuator motor
Damaged or corroded wiring harness or connector to throttle body
Open/short in actuator control circuit or power/ground supply
Faulty accelerator pedal position (APP) sensor or sensor correlation error
Carbon buildup or mechanical binding of throttle plate
Low battery voltage or poor charging system

Symptoms

Check Engine Light (MIL) illuminated
Reduced engine power / limp-home mode
Poor or delayed throttle response and hesitation
Unstable or high/low idle
Possible engine stall during idle or decel
Throttle warning message or lamp in instrument cluster

What to check

Read and record stored DTCs and freeze-frame data with a factory-level scan tool
Check battery voltage and charging system; ensure battery is fully charged (ideally >12.4 V at rest)
Visually inspect throttle body connector and wiring for corrosion, damage, or loose pins
Check fuses and relays related to throttle control
Scan live data: compare accelerator pedal sensor(s) vs commanded throttle vs actual throttle position
Attempt to command throttle open/closed with diagnostic tool while observing response

Signal parameters

Accelerator pedal position sensor A (APP A) – percent or volts
Accelerator pedal position sensor B (APP B) – percent or volts (should correlate with A)
Desired/Commanded throttle position – percent (0–100%)
Actual throttle plate position – percent (0–100%)
Throttle actuator motor current – amps (watch for excessive or zero current)
Control module supply voltage – volts (should be stable near battery voltage)

Diagnostic algorithm

Retrieve all DTCs and freeze-frame data. Note any related codes (APP, CAN, battery).
Verify battery voltage and charging system. Recharge or replace weak battery before continuing.
Perform a visual inspection of the throttle body harness and connector. Repair any damaged wiring, bent pins, or corrosion.
Check related fuses/relays and replace if faulty.
With a scan tool, monitor APP sensors and throttle commanded vs actual while operating the accelerator; look for mismatch or no movement.
Perform a wiggle test of wiring/connectors while monitoring live data to find intermittent faults.
If throttle plate is heavily carboned or sticking, clean the throttle body per factory procedure and re-test.
Command the throttle actuator to move using a diagnostic tool. If actuator does not respond, measure motor resistance and motor supply voltage/ground at the connector.
If motor draws excessive current or resistance is out of spec, replace the throttle body assembly.
If actuator and wiring test good but fault remains, check APP sensor correlation (P2135-style failures) and replace APP module if needed.
After repairs, clear codes, perform throttle/idle relearn or adaptation per service manual, then road test to confirm repair.
If problem persists, consider ECM software update or ECM replacement as directed by dealer service information.

Likely causes

Wiring/connectors to the throttle body are open, shorted, or corroded
Throttle actuator motor or internal throttle body electronics failed
Throttle plate mechanically sticking from carbon/contamination
APP sensor mismatch or signal fault causing control errors
Intermittent low battery/voltage causing actuator malfunction

Fault status

⚠️ Status

P1611 – Throttle Actuator 1 Malfunction: ECM detected throttle actuator or control circuit fault. May limit engine power and place vehicle in limp mode until condition is resolved.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.5 - 3.0 hours

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P1611 — Malfunction of throttle actuator 1 Throttle malfunction