P2141

Code

LAND ROVER P — Powertrain

Exhaust gas recirculation throttle control - low circuit

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 13 EN: 21 RU: 23

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Page language: EN

Causes

Open or shorted wiring in EGR throttle control circuit
Corroded or loose connector at EGR throttle actuator
Failed EGR throttle actuator (motor/servo) or internal position sensor
Blown fuse or faulty relay supplying the actuator
Poor ground at actuator or chassis ground
ECM/PCM fault or internal driver failure

Symptoms

Malfunction Indicator Lamp (MIL/CEL) illuminated
Reduced engine power or limp mode
Rough idle, stalling, or hesitation
Poor idle stability or surging
Failed emissions test or increased NOx emissions
EGR-related drivability faults such as pinging/knock under load

What to check

Read freeze frame data and live PIDs (EGR throttle position, commanded position, battery voltage)
Visual inspection of wiring, connectors, and harness routing to EGR throttle actuator for damage or corrosion
Check for related DTCs (EGR, throttle body, powertrain) that could provide context
Measure supply voltage to actuator connector with key ON (should be ~11–14 V where applicable)
Verify ground integrity at actuator and chassis ground
Backprobe position sensor signal and compare actual vs commanded position

Signal parameters

Actuator supply voltage (battery feed): typically ~11–14 V with key ON
Position sensor output: typical range ~0.5–4.5 V (varies by design); should change smoothly with actuator movement
Command signal: PWM duty or control command from ECM (0–100% duty cycle) or voltage command depending on design
Expected continuity: no open between supply and actuator; low resistance to ground where applicable
Reference frequency (if PWM): manufacturer-specific, often tens to a few hundred Hz

Diagnostic algorithm

Use a scan tool to record DTCs, freeze frame, and live data for EGR throttle position vs commanded position. Note battery voltage and any related faults.
Perform a thorough visual inspection of the EGR throttle actuator, connector, and harness for damage, corrosion, or signs of overheating. Repair as needed.
Check fuses/relays for the EGR/throttle circuit. Replace any blown fuse and test relay operation.
With connector connected, monitor the actuator supply and signal on a lab scope or multimeter while commanding the EGR throttle through the scan tool. Verify supply voltage and that the ECM is issuing a control signal.
Backprobe the actuator connector: verify supply (battery), ground, and position feedback. Look for open circuits (infinite resistance) or shorts to ground/voltage.
Perform resistance/continuity checks on the wiring between the actuator and ECM; repair any opens or shorts. Check grounds for low resistance to chassis.
If wiring and power/ground are correct but the position feedback does not change when commanded, replace the EGR throttle actuator. Re-test after replacement.
If actuator replacement does not clear the issue and wiring is confirmed good, consider ECM driver fault — confirm with manufacturer OEM diagnostic procedures before replacing ECM.
After repairs, clear DTCs and perform a road/functional test and re-scan to ensure code does not return. If code returns, escalate to manufacturer-specific diagnostics or software reflash.

Likely causes

Damaged connector pins or water intrusion at actuator connector
Broken or chafed wire causing open circuit or intermittent low voltage
Faulty EGR throttle actuator (common on higher-mileage units)
Missing or poor ground at actuator
Blown inline fuse or bad relay in the supply circuit

Fault status

⚠️ Status

Exhaust Gas Recirculation Throttle Control - Low Circuit (P2141)

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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P2141 — Exhaust gas recirculation throttle control - low circuit