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Home / DTC / P2047 — Reductant Injection Valve Circuit/Open Bank 1 Unit 1

P2047 — Reductant Injection Valve Circuit/Open Bank 1 Unit 1

Detailed page for trouble code P2047.

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Code

P2047

Generic P — Powertrain

Reductant Injection Valve Circuit/Open Bank 1 Unit 1

Brand: Generic
Type: P — Powertrain
Views: UK: 13 EN: 25 RU: 29
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or broken wiring between ECM and reductant injection valve
  • Faulty/failed reductant injection valve (open coil)
  • Corroded/loose connector or terminal at the valve
  • Blown fuse or faulty relay supplying the reductant valve circuit
  • Poor or missing ground connection
  • ECM/driver module fault

Symptoms

  • Malfunction Indicator Lamp (MIL) / check engine lamp illuminated
  • Reduced or disabled SCR dosing, possible increased NOx output
  • Aftertreatment system warning or reduced power/limp mode in some vehicles
  • Possible reduced fuel economy or failed emissions test
  • Diagnostic trouble code P2047 stored

What to check

  • Read and record all stored DTCs and freeze frame data with a scan tool
  • Visual inspection of reductant valve connector, wiring harness and protective sleeving for damage, corrosion, or pin/back-out
  • Check fuses/relays related to reductant/aftertreatment circuits
  • Attempt to command the reductant valve with a scan tool and observe status
  • Wiggle test the harness while monitoring the circuit for intermittent faults
  • Measure voltage and continuity at the valve connector with the ECM connected (see signal_params)

Signal parameters

  • Coil resistance: typically low ohms — commonly in the range ~5–35 Ω (manufacturer-specific). An open reading (OL) indicates a failed coil.
  • Supply voltage: battery voltage (~12 V) present at supply pin when circuit powered; may be switched or fused
  • Driver output: ECM usually provides a ground-side switch or PWM driver when commanded; expect a pulsed ground or varying duty cycle during activation
  • No voltage/continuity on the valve coil circuit when the valve is not commanded (open circuit expected only if valve is removed or wiring is broken)
  • Current draw: valve current will rise when energized (use clamp meter or current-capable scope)

Diagnostic algorithm

  1. Retrieve freeze frame data and all related DTCs. Note whether the code is current or historic.
  2. Visually inspect the reductant injection valve connector and harness at the valve and along the route to the ECM for damage, corrosion, or water ingress. Repair as needed.
  3. Check fuses and relays that feed the reductant system. Replace any blown fuses and retest.
  4. With ignition OFF, disconnect the valve connector. Measure coil resistance between valve pins. If resistance is infinite/OL, replace the valve.
  5. With connector disconnected and ignition ON (or as specified by manufacturer), measure for battery voltage on the supply pin. If no supply, trace back to fuse/relay/wiring.
  6. With connector connected, command the valve ON using a scan tool and measure for a switching ground or PWM on the signal pin. If the ECM does not command, verify scan-tool commands and permissions.
  7. If supply voltage is present and the ECM commands but no change in current/voltage at the valve, suspect open in wiring between connector and ECM or defective ECM driver. Perform continuity test to ECM pin if accessible.
  8. If continuity to ECM is good and wiring/connector/fuse are good but valve coil is open, replace the reductant injection valve and clear codes.
  9. After repairs, clear codes and perform active tests to verify valve operation and confirm P2047 does not return. Road test and re-scan to ensure proper SCR dosing behavior.
  10. If diagnostics point to ECM driver failure, confirm with manufacturer-specific procedures before replacing ECM; check for technical service bulletins.

Likely causes

  • Disconnected/corroded connector at the reductant injection valve
  • Open/failed valve coil (electrical open)
  • Wiring harness damage (broken conductor) between valve and ECM
  • Blown fuse or faulty power supply to the valve
  • Defective ECM driver (less common)

Fault status

⚠️ Status
Reductant injection valve circuit open detected on Bank 1, Unit 1 — check valve, wiring, and power/ground to injector circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P2046 P2048 P0201 P0202 P2A00
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Code

P2047

LAND ROVER P — Powertrain

Reduced injector - open circuit (bank 1, unit 1)

Brand: LAND ROVER
Type: P — Powertrain
Views: UK: 3 EN: 9 RU: 7
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or broken wiring between ECM and reductant injection valve
  • Faulty/failed reductant injection valve (open coil)
  • Corroded/loose connector or terminal at the valve
  • Blown fuse or faulty relay supplying the reductant valve circuit
  • Poor or missing ground connection
  • ECM/driver module fault

Symptoms

  • Malfunction Indicator Lamp (MIL) / check engine lamp illuminated
  • Reduced or disabled SCR dosing, possible increased NOx output
  • Aftertreatment system warning or reduced power/limp mode in some vehicles
  • Possible reduced fuel economy or failed emissions test
  • Diagnostic trouble code P2047 stored

What to check

  • Read and record all stored DTCs and freeze frame data with a scan tool
  • Visual inspection of reductant valve connector, wiring harness and protective sleeving for damage, corrosion, or pin/back-out
  • Check fuses/relays related to reductant/aftertreatment circuits
  • Attempt to command the reductant valve with a scan tool and observe status
  • Wiggle test the harness while monitoring the circuit for intermittent faults
  • Measure voltage and continuity at the valve connector with the ECM connected (see signal_params)

Signal parameters

  • Coil resistance: typically low ohms — commonly in the range ~5–35 Ω (manufacturer-specific). An open reading (OL) indicates a failed coil.
  • Supply voltage: battery voltage (~12 V) present at supply pin when circuit powered; may be switched or fused
  • Driver output: ECM usually provides a ground-side switch or PWM driver when commanded; expect a pulsed ground or varying duty cycle during activation
  • No voltage/continuity on the valve coil circuit when the valve is not commanded (open circuit expected only if valve is removed or wiring is broken)
  • Current draw: valve current will rise when energized (use clamp meter or current-capable scope)

Diagnostic algorithm

  1. Retrieve freeze frame data and all related DTCs. Note whether the code is current or historic.
  2. Visually inspect the reductant injection valve connector and harness at the valve and along the route to the ECM for damage, corrosion, or water ingress. Repair as needed.
  3. Check fuses and relays that feed the reductant system. Replace any blown fuses and retest.
  4. With ignition OFF, disconnect the valve connector. Measure coil resistance between valve pins. If resistance is infinite/OL, replace the valve.
  5. With connector disconnected and ignition ON (or as specified by manufacturer), measure for battery voltage on the supply pin. If no supply, trace back to fuse/relay/wiring.
  6. With connector connected, command the valve ON using a scan tool and measure for a switching ground or PWM on the signal pin. If the ECM does not command, verify scan-tool commands and permissions.
  7. If supply voltage is present and the ECM commands but no change in current/voltage at the valve, suspect open in wiring between connector and ECM or defective ECM driver. Perform continuity test to ECM pin if accessible.
  8. If continuity to ECM is good and wiring/connector/fuse are good but valve coil is open, replace the reductant injection valve and clear codes.
  9. After repairs, clear codes and perform active tests to verify valve operation and confirm P2047 does not return. Road test and re-scan to ensure proper SCR dosing behavior.
  10. If diagnostics point to ECM driver failure, confirm with manufacturer-specific procedures before replacing ECM; check for technical service bulletins.

Likely causes

  • Disconnected/corroded connector at the reductant injection valve
  • Open/failed valve coil (electrical open)
  • Wiring harness damage (broken conductor) between valve and ECM
  • Blown fuse or faulty power supply to the valve
  • Defective ECM driver (less common)

Fault status

⚠️ Status
Reductant injection valve circuit open detected on Bank 1, Unit 1 — check valve, wiring, and power/ground to injector circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P2046 P2048 P0201 P0202 P2A00
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  • 10 MAINTENANCE
  • 12 ENGINE Tdi
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Key sections:
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  • - Accessories and conversions
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  • 1.6 Abbreviations
  • 1.7 HeVAC, sensors abbreviations
  • 1.8 How to use this document
  • 1.9 Connector detail format
  • 1.10 Fault diagnosis
  • 1.11 Wire colour codes
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