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Home / DTC / P1730 — Frt speed snsr input sig low

P1730 — Frt speed snsr input sig low

Detailed page for trouble code P1730.

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11,841generic
22,491specific
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Code

P1730

DAEWOO P — Powertrain

Frt speed snsr input sig low

Brand: DAEWOO
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed front wheel speed sensor (hall or variable reluctor)
  • Broken, shorted or corroded wiring/connector to the sensor
  • Poor or missing sensor ground or reference voltage
  • Missing, damaged or heavily contaminated tone/reluctor ring
  • Faulty ABS/traction control module or ECM input circuit
  • Intermittent connection due to movement or damaged harness near suspension

Symptoms

  • ABS and/or traction control warning lamp illuminated
  • Speedometer or odometer irregularities (may be intermittent)
  • Reduced traction control or ABS functionality
  • Possible shift or transmission behavior changes if speed data used by transmission
  • Diagnostic trouble code stored and possibly freeze-frame data

What to check

  • Scan for codes and view freeze-frame/live data for the front speed sensor
  • Visual inspection of front wheel sensor(s), tone ring, wiring and connectors
  • Backprobe sensor connector and verify reference voltage, signal and ground present
  • Measure sensor resistance (for passive sensors) and compare with spec
  • Check continuity and for short to ground/voltage between sensor and module
  • Use oscilloscope (preferred) to confirm sensor waveform at wheel spin

Signal parameters

  • Hall-effect sensor: typically a 0–5 V square/pulse waveform referenced to ground
  • Variable reluctor (passive) sensor: AC sine/alternating voltage that increases with wheel speed (often 0.1–1.0 Vrms at low speeds)
  • Reference supply commonly ~5 V (verify vehicle-specific value) and solid ground
  • Open circuit or voltage near 0 V indicates low/no signal; short to ground pulls signal low

Diagnostic algorithm

  1. Retrieve stored codes and freeze-frame data with a scan tool. Confirm P1730 and note which front sensor (left/right) if specified.
  2. Perform a visual inspection of the sensor, tone ring, and connector for damage, debris, oil or corrosion.
  3. With ignition ON (engine off), backprobe the sensor connector: verify reference voltage, ground continuity and signal wire voltage. Compare to vehicle specifications.
  4. Spin the wheel by hand (vehicle safely lifted and secured) while monitoring live data or using an oscilloscope to observe the sensor waveform. No waveform or very low amplitude indicates a problem.
  5. Measure sensor resistance (if passive) and compare to spec. Replace sensor if out of range.
  6. Check harness continuity from sensor connector to the ABS/ECM connector and inspect for shorts to ground or power. Repair any damaged wiring or connectors.
  7. Inspect tone/reluctor ring teeth for damage or heavy rust/debris. Replace or clean as needed.
  8. If wiring and sensor check good, test/inspect the control module input or swap with a known-good sensor (if feasible) to isolate module fault.
  9. After repairs, clear codes and perform a road test to confirm the code does not return and systems operate normally.

Likely causes

  • Wiring damage or connector corrosion at the front sensor
  • Failed front wheel speed sensor
  • Damaged or missing tone ring on the hub/axle assembly

Fault status

⚠️ Status
Front speed sensor input signal low — low or missing signal detected from front wheel speed sensor circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

C0035 C0040 P0500 P0720
Repair manuals

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75

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Code

P1730

JAGUAR P — Powertrain

Gear Control Malfunction 2 3 5

Brand: JAGUAR
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed front wheel speed sensor (hall or variable reluctor)
  • Broken, shorted or corroded wiring/connector to the sensor
  • Poor or missing sensor ground or reference voltage
  • Missing, damaged or heavily contaminated tone/reluctor ring
  • Faulty ABS/traction control module or ECM input circuit
  • Intermittent connection due to movement or damaged harness near suspension

Symptoms

  • ABS and/or traction control warning lamp illuminated
  • Speedometer or odometer irregularities (may be intermittent)
  • Reduced traction control or ABS functionality
  • Possible shift or transmission behavior changes if speed data used by transmission
  • Diagnostic trouble code stored and possibly freeze-frame data

What to check

  • Scan for codes and view freeze-frame/live data for the front speed sensor
  • Visual inspection of front wheel sensor(s), tone ring, wiring and connectors
  • Backprobe sensor connector and verify reference voltage, signal and ground present
  • Measure sensor resistance (for passive sensors) and compare with spec
  • Check continuity and for short to ground/voltage between sensor and module
  • Use oscilloscope (preferred) to confirm sensor waveform at wheel spin

Signal parameters

  • Hall-effect sensor: typically a 0–5 V square/pulse waveform referenced to ground
  • Variable reluctor (passive) sensor: AC sine/alternating voltage that increases with wheel speed (often 0.1–1.0 Vrms at low speeds)
  • Reference supply commonly ~5 V (verify vehicle-specific value) and solid ground
  • Open circuit or voltage near 0 V indicates low/no signal; short to ground pulls signal low

Diagnostic algorithm

  1. Retrieve stored codes and freeze-frame data with a scan tool. Confirm P1730 and note which front sensor (left/right) if specified.
  2. Perform a visual inspection of the sensor, tone ring, and connector for damage, debris, oil or corrosion.
  3. With ignition ON (engine off), backprobe the sensor connector: verify reference voltage, ground continuity and signal wire voltage. Compare to vehicle specifications.
  4. Spin the wheel by hand (vehicle safely lifted and secured) while monitoring live data or using an oscilloscope to observe the sensor waveform. No waveform or very low amplitude indicates a problem.
  5. Measure sensor resistance (if passive) and compare to spec. Replace sensor if out of range.
  6. Check harness continuity from sensor connector to the ABS/ECM connector and inspect for shorts to ground or power. Repair any damaged wiring or connectors.
  7. Inspect tone/reluctor ring teeth for damage or heavy rust/debris. Replace or clean as needed.
  8. If wiring and sensor check good, test/inspect the control module input or swap with a known-good sensor (if feasible) to isolate module fault.
  9. After repairs, clear codes and perform a road test to confirm the code does not return and systems operate normally.

Likely causes

  • Wiring damage or connector corrosion at the front sensor
  • Failed front wheel speed sensor
  • Damaged or missing tone ring on the hub/axle assembly

Fault status

⚠️ Status
Front speed sensor input signal low — low or missing signal detected from front wheel speed sensor circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

C0035 C0040 P0500 P0720
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Code

P1730

LAND ROVER P — Powertrain

Malfunction of the control of march 1,2,3,4

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed front wheel speed sensor (hall or variable reluctor)
  • Broken, shorted or corroded wiring/connector to the sensor
  • Poor or missing sensor ground or reference voltage
  • Missing, damaged or heavily contaminated tone/reluctor ring
  • Faulty ABS/traction control module or ECM input circuit
  • Intermittent connection due to movement or damaged harness near suspension

Symptoms

  • ABS and/or traction control warning lamp illuminated
  • Speedometer or odometer irregularities (may be intermittent)
  • Reduced traction control or ABS functionality
  • Possible shift or transmission behavior changes if speed data used by transmission
  • Diagnostic trouble code stored and possibly freeze-frame data

What to check

  • Scan for codes and view freeze-frame/live data for the front speed sensor
  • Visual inspection of front wheel sensor(s), tone ring, wiring and connectors
  • Backprobe sensor connector and verify reference voltage, signal and ground present
  • Measure sensor resistance (for passive sensors) and compare with spec
  • Check continuity and for short to ground/voltage between sensor and module
  • Use oscilloscope (preferred) to confirm sensor waveform at wheel spin

Signal parameters

  • Hall-effect sensor: typically a 0–5 V square/pulse waveform referenced to ground
  • Variable reluctor (passive) sensor: AC sine/alternating voltage that increases with wheel speed (often 0.1–1.0 Vrms at low speeds)
  • Reference supply commonly ~5 V (verify vehicle-specific value) and solid ground
  • Open circuit or voltage near 0 V indicates low/no signal; short to ground pulls signal low

Diagnostic algorithm

  1. Retrieve stored codes and freeze-frame data with a scan tool. Confirm P1730 and note which front sensor (left/right) if specified.
  2. Perform a visual inspection of the sensor, tone ring, and connector for damage, debris, oil or corrosion.
  3. With ignition ON (engine off), backprobe the sensor connector: verify reference voltage, ground continuity and signal wire voltage. Compare to vehicle specifications.
  4. Spin the wheel by hand (vehicle safely lifted and secured) while monitoring live data or using an oscilloscope to observe the sensor waveform. No waveform or very low amplitude indicates a problem.
  5. Measure sensor resistance (if passive) and compare to spec. Replace sensor if out of range.
  6. Check harness continuity from sensor connector to the ABS/ECM connector and inspect for shorts to ground or power. Repair any damaged wiring or connectors.
  7. Inspect tone/reluctor ring teeth for damage or heavy rust/debris. Replace or clean as needed.
  8. If wiring and sensor check good, test/inspect the control module input or swap with a known-good sensor (if feasible) to isolate module fault.
  9. After repairs, clear codes and perform a road test to confirm the code does not return and systems operate normally.

Likely causes

  • Wiring damage or connector corrosion at the front sensor
  • Failed front wheel speed sensor
  • Damaged or missing tone ring on the hub/axle assembly

Fault status

⚠️ Status
Front speed sensor input signal low — low or missing signal detected from front wheel speed sensor circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

C0035 C0040 P0500 P0720
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
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Code

P1730

MITSUBISHI P — Powertrain

CVT system fail

Brand: MITSUBISHI
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed front wheel speed sensor (hall or variable reluctor)
  • Broken, shorted or corroded wiring/connector to the sensor
  • Poor or missing sensor ground or reference voltage
  • Missing, damaged or heavily contaminated tone/reluctor ring
  • Faulty ABS/traction control module or ECM input circuit
  • Intermittent connection due to movement or damaged harness near suspension

Symptoms

  • ABS and/or traction control warning lamp illuminated
  • Speedometer or odometer irregularities (may be intermittent)
  • Reduced traction control or ABS functionality
  • Possible shift or transmission behavior changes if speed data used by transmission
  • Diagnostic trouble code stored and possibly freeze-frame data

What to check

  • Scan for codes and view freeze-frame/live data for the front speed sensor
  • Visual inspection of front wheel sensor(s), tone ring, wiring and connectors
  • Backprobe sensor connector and verify reference voltage, signal and ground present
  • Measure sensor resistance (for passive sensors) and compare with spec
  • Check continuity and for short to ground/voltage between sensor and module
  • Use oscilloscope (preferred) to confirm sensor waveform at wheel spin

Signal parameters

  • Hall-effect sensor: typically a 0–5 V square/pulse waveform referenced to ground
  • Variable reluctor (passive) sensor: AC sine/alternating voltage that increases with wheel speed (often 0.1–1.0 Vrms at low speeds)
  • Reference supply commonly ~5 V (verify vehicle-specific value) and solid ground
  • Open circuit or voltage near 0 V indicates low/no signal; short to ground pulls signal low

Diagnostic algorithm

  1. Retrieve stored codes and freeze-frame data with a scan tool. Confirm P1730 and note which front sensor (left/right) if specified.
  2. Perform a visual inspection of the sensor, tone ring, and connector for damage, debris, oil or corrosion.
  3. With ignition ON (engine off), backprobe the sensor connector: verify reference voltage, ground continuity and signal wire voltage. Compare to vehicle specifications.
  4. Spin the wheel by hand (vehicle safely lifted and secured) while monitoring live data or using an oscilloscope to observe the sensor waveform. No waveform or very low amplitude indicates a problem.
  5. Measure sensor resistance (if passive) and compare to spec. Replace sensor if out of range.
  6. Check harness continuity from sensor connector to the ABS/ECM connector and inspect for shorts to ground or power. Repair any damaged wiring or connectors.
  7. Inspect tone/reluctor ring teeth for damage or heavy rust/debris. Replace or clean as needed.
  8. If wiring and sensor check good, test/inspect the control module input or swap with a known-good sensor (if feasible) to isolate module fault.
  9. After repairs, clear codes and perform a road test to confirm the code does not return and systems operate normally.

Likely causes

  • Wiring damage or connector corrosion at the front sensor
  • Failed front wheel speed sensor
  • Damaged or missing tone ring on the hub/axle assembly

Fault status

⚠️ Status
Front speed sensor input signal low — low or missing signal detected from front wheel speed sensor circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

C0035 C0040 P0500 P0720
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MITSUBISHI

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P1730

Other P — Powertrain

Gear Control Malfunction 2,3,5

Brand: Other
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or failed front wheel speed sensor (hall or variable reluctor)
  • Broken, shorted or corroded wiring/connector to the sensor
  • Poor or missing sensor ground or reference voltage
  • Missing, damaged or heavily contaminated tone/reluctor ring
  • Faulty ABS/traction control module or ECM input circuit
  • Intermittent connection due to movement or damaged harness near suspension

Symptoms

  • ABS and/or traction control warning lamp illuminated
  • Speedometer or odometer irregularities (may be intermittent)
  • Reduced traction control or ABS functionality
  • Possible shift or transmission behavior changes if speed data used by transmission
  • Diagnostic trouble code stored and possibly freeze-frame data

What to check

  • Scan for codes and view freeze-frame/live data for the front speed sensor
  • Visual inspection of front wheel sensor(s), tone ring, wiring and connectors
  • Backprobe sensor connector and verify reference voltage, signal and ground present
  • Measure sensor resistance (for passive sensors) and compare with spec
  • Check continuity and for short to ground/voltage between sensor and module
  • Use oscilloscope (preferred) to confirm sensor waveform at wheel spin

Signal parameters

  • Hall-effect sensor: typically a 0–5 V square/pulse waveform referenced to ground
  • Variable reluctor (passive) sensor: AC sine/alternating voltage that increases with wheel speed (often 0.1–1.0 Vrms at low speeds)
  • Reference supply commonly ~5 V (verify vehicle-specific value) and solid ground
  • Open circuit or voltage near 0 V indicates low/no signal; short to ground pulls signal low

Diagnostic algorithm

  1. Retrieve stored codes and freeze-frame data with a scan tool. Confirm P1730 and note which front sensor (left/right) if specified.
  2. Perform a visual inspection of the sensor, tone ring, and connector for damage, debris, oil or corrosion.
  3. With ignition ON (engine off), backprobe the sensor connector: verify reference voltage, ground continuity and signal wire voltage. Compare to vehicle specifications.
  4. Spin the wheel by hand (vehicle safely lifted and secured) while monitoring live data or using an oscilloscope to observe the sensor waveform. No waveform or very low amplitude indicates a problem.
  5. Measure sensor resistance (if passive) and compare to spec. Replace sensor if out of range.
  6. Check harness continuity from sensor connector to the ABS/ECM connector and inspect for shorts to ground or power. Repair any damaged wiring or connectors.
  7. Inspect tone/reluctor ring teeth for damage or heavy rust/debris. Replace or clean as needed.
  8. If wiring and sensor check good, test/inspect the control module input or swap with a known-good sensor (if feasible) to isolate module fault.
  9. After repairs, clear codes and perform a road test to confirm the code does not return and systems operate normally.

Likely causes

  • Wiring damage or connector corrosion at the front sensor
  • Failed front wheel speed sensor
  • Damaged or missing tone ring on the hub/axle assembly

Fault status

⚠️ Status
Front speed sensor input signal low — low or missing signal detected from front wheel speed sensor circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

C0035 C0040 P0500 P0720
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