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U0407 — Invalid Data Received From Glow Plug Control Module 1

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Code

U0407

Generic U — Network/User

Invalid Data Received From Glow Plug Control Module 1

Views: UK: 19 EN: 37 RU: 26
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Corroded/damaged connector at glow plug control module
  • Broken, shorted, or chafed wiring between glow plug control module and CAN/data bus or power/ground
  • Faulty Glow Plug Control Module 1 (internal failure)
  • Intermittent CAN bus communication or missing bus termination
  • Software/version mismatch or corrupted module calibration
  • Low battery or supply voltage spikes during communication

Symptoms

  • Malfunction indicator lamp (MIL) or glow plug warning lamp illuminated
  • Difficult cold starts or extended cranking time on diesel engines
  • Glow plug operation not commanded or inconsistent heating
  • Other modules report communication faults or show multiple U-codes
  • Possible engine performance faults during warm-up

What to check

  • Read all stored DTCs and freeze-frame data with a capable scan tool; note time stamps and related codes
  • Inspect module connector and wiring for corrosion, bent pins, water intrusion, heat damage or repairs
  • Check related fuses and relays (glow plug circuit and module supply)
  • Verify battery voltage and charging system are within spec before/while diagnosing
  • Attempt to communicate with Glow Plug Control Module 1 using a factory-level scan tool
  • Check for other U-codes on the CAN bus that indicate a broader network problem

Signal parameters

  • Protocol: CAN bus (commonly high-speed CAN) — 250 kbps or 500 kbps depending on vehicle
  • Typical idle CAN voltages: CAN_H ~2.5 V, CAN_L ~2.5 V (differential ~0 V when idle); complementary swing during signaling
  • Message format: standard 11-bit or extended 29-bit identifiers; payload commonly 8 bytes per frame
  • Expected message frequency: dependent on manufacturer (often 5–100 Hz for status messages)
  • Module power: reference vehicle battery voltage (12–14.5 V) on supply terminal; good chassis and signal grounds

Diagnostic algorithm

  1. Connect a capable scanner and record all U-codes and related DTCs; note whether U0407 is active or stored. 2) Verify battery voltage and charging system; low voltage can corrupt messages. 3) Visually inspect the glow plug control module connector, pins and wiring harness for corrosion, bent pins, rubbing or rodent damage. Repair as needed. 4) Check fuses/relays for the module’s power feed; verify switched and constant power and good ground(s) with a meter. 5) Attempt communication with the module via scan tool; if module does not respond or returns garbled data, suspect harness or module. 6) Measure CAN bus voltages (with DVOM or scope): verify CAN_H and CAN_L idle voltages and differential signaling while attempting communication. Look for bus shorts or missing termination. 7) Wiggle-test wiring and connectors while watching live data or DTCs to locate intermittent faults. 8) If wiring and bus look good, consult manufacturer bulletins for software updates or known issues; perform module reflash or reprogramming if applicable. 9) If fault follows the module after wiring and software checks, replace the Glow Plug Control Module 1 and reprogram/configure per manufacturer procedures. 10) Clear codes and road/test or reproduce conditions to confirm repair; monitor for reappearance of U0407 and related codes.

Likely causes

  • Corroded or loose connector at the glow plug control module
  • Open or short in CAN high/low wires or power/ground circuits to the module
  • Faulty glow plug control module requiring replacement or reflash

Fault status

⚠️ Status
Invalid data received from Glow Plug Control Module 1 — communication/data integrity fault reported by vehicle network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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Code

U0407

LAND ROVER U — Network/User

Invalid data received from the spark plug control module incandescence

Views: UK: 7 EN: 18 RU: 11
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Corroded/damaged connector at glow plug control module
  • Broken, shorted, or chafed wiring between glow plug control module and CAN/data bus or power/ground
  • Faulty Glow Plug Control Module 1 (internal failure)
  • Intermittent CAN bus communication or missing bus termination
  • Software/version mismatch or corrupted module calibration
  • Low battery or supply voltage spikes during communication

Symptoms

  • Malfunction indicator lamp (MIL) or glow plug warning lamp illuminated
  • Difficult cold starts or extended cranking time on diesel engines
  • Glow plug operation not commanded or inconsistent heating
  • Other modules report communication faults or show multiple U-codes
  • Possible engine performance faults during warm-up

What to check

  • Read all stored DTCs and freeze-frame data with a capable scan tool; note time stamps and related codes
  • Inspect module connector and wiring for corrosion, bent pins, water intrusion, heat damage or repairs
  • Check related fuses and relays (glow plug circuit and module supply)
  • Verify battery voltage and charging system are within spec before/while diagnosing
  • Attempt to communicate with Glow Plug Control Module 1 using a factory-level scan tool
  • Check for other U-codes on the CAN bus that indicate a broader network problem

Signal parameters

  • Protocol: CAN bus (commonly high-speed CAN) — 250 kbps or 500 kbps depending on vehicle
  • Typical idle CAN voltages: CAN_H ~2.5 V, CAN_L ~2.5 V (differential ~0 V when idle); complementary swing during signaling
  • Message format: standard 11-bit or extended 29-bit identifiers; payload commonly 8 bytes per frame
  • Expected message frequency: dependent on manufacturer (often 5–100 Hz for status messages)
  • Module power: reference vehicle battery voltage (12–14.5 V) on supply terminal; good chassis and signal grounds

Diagnostic algorithm

  1. Connect a capable scanner and record all U-codes and related DTCs; note whether U0407 is active or stored. 2) Verify battery voltage and charging system; low voltage can corrupt messages. 3) Visually inspect the glow plug control module connector, pins and wiring harness for corrosion, bent pins, rubbing or rodent damage. Repair as needed. 4) Check fuses/relays for the module’s power feed; verify switched and constant power and good ground(s) with a meter. 5) Attempt communication with the module via scan tool; if module does not respond or returns garbled data, suspect harness or module. 6) Measure CAN bus voltages (with DVOM or scope): verify CAN_H and CAN_L idle voltages and differential signaling while attempting communication. Look for bus shorts or missing termination. 7) Wiggle-test wiring and connectors while watching live data or DTCs to locate intermittent faults. 8) If wiring and bus look good, consult manufacturer bulletins for software updates or known issues; perform module reflash or reprogramming if applicable. 9) If fault follows the module after wiring and software checks, replace the Glow Plug Control Module 1 and reprogram/configure per manufacturer procedures. 10) Clear codes and road/test or reproduce conditions to confirm repair; monitor for reappearance of U0407 and related codes.

Likely causes

  • Corroded or loose connector at the glow plug control module
  • Open or short in CAN high/low wires or power/ground circuits to the module
  • Faulty glow plug control module requiring replacement or reflash

Fault status

⚠️ Status
Invalid data received from Glow Plug Control Module 1 — communication/data integrity fault reported by vehicle network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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  • - Used engine oil precautions
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  • 1.9 Connector detail format
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  • 1.11 Wire colour codes
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