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Home / DTC / P0342 — Camshaft Position Sensor A - Low Input Circuit (Bank 1 or single sensor

P0342 — Camshaft Position Sensor A - Low Input Circuit (Bank 1 or single sensor

Detailed page for trouble code P0342.

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P0342

LAND ROVER P — Powertrain

Camshaft Position Sensor A - Low Input Circuit (Bank 1 or single sensor

Brand: LAND ROVER
Type: P — Powertrain
AI status
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Page language: EN

Causes

  • Open or broken signal wire between sensor and ECM
  • Short to ground on the sensor signal circuit
  • Corroded, loose, or damaged sensor connector or pins
  • Failed camshaft position sensor (hall or VR type)
  • Missing or weak reference power/ground to the sensor
  • Damaged reluctor tone ring or timing component (no/weak signal)

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Engine cranks but is difficult to start or will not start
  • Rough idle, misfiring or reduced engine power
  • Intermittent stalling or hesitations on acceleration
  • Reduced fuel economy or limp-home mode in some vehicles
  • No cam signal visible with scanner/oscilloscope

What to check

  • Read freeze frame and full DTC list; note conditions when code set
  • Check for other related codes (crank/cam correlation, ECM faults)
  • Visually inspect sensor, connector, and wiring for damage, corrosion, oil, or loose pins
  • Backprobe sensor connector with key ON (engine OFF) to verify reference voltage and ground
  • Use a multimeter to measure signal voltage while cranking and running
  • Perform a wiggle test on wiring/connector while watching live data for signal loss

Signal parameters

  • Hall-effect type: square wave ~0 to 5 V (0V = low input), frequency proportional to engine speed
  • Variable reluctor (VR) type: AC sine signal, amplitude typically 0.5–12 Vrms depending on RPM (low amplitude indicates a problem)
  • At cranking: intermittent pulses visible on scanner/oscilloscope; cam pulses occur once per cam revolution (half crank rev frequency)
  • Reference supply commonly 5 V (hall sensors) and good ground; no erroneous short to ground

Diagnostic algorithm

  1. Verify the customer concern and note conditions when fault occurs (cold/hot, cranking/running)
  2. Connect OBD-II scanner, read/record freeze frame and related codes; clear codes and attempt to re-create
  3. Visually inspect sensor, wiring, and connector for damage, oil contamination, corrosion, or disconnection
  4. With ignition ON (engine OFF) backprobe connector: verify sensor reference voltage (typically 5 V for hall sensors) and good ground; repair missing reference/ground before proceeding
  5. Measure signal wire voltage while cranking and while engine running: for hall sensor look for 0–5 V square pulses; for VR sensor look for AC voltage. If no or low signal, continue diagnostics
  6. Perform continuity/resistance checks: signal circuit to ECM, and resistance of sensor per manufacturer spec; repair any opens/shorts
  7. If wiring and power/ground are confirmed good but signal is absent or intermittent, swap the camshaft position sensor with a known-good unit (if possible) or install a replacement and retest
  8. If swapping sensor does not resolve and wiring checks good, inspect reluctor/target and cam timing for mechanical damage or timing chain/belt jump
  9. Check ECM connector and grounds; if all circuits test good and problem persists, consider ECM fault and consult manufacturer service information before replacement
  10. After repair, clear codes and road-test to verify repair; monitor live data and capture waveform to confirm stable cam signal

Likely causes

  • Wiring harness chafed and shorted to chassis ground near sensor
  • Connector contaminated with oil/water causing poor contact
  • Sensor failed due to heat, oil ingress, or wear
  • Connector pins bent or pushed out at the harness or ECM
  • Timing chain/belt slipped or damaged reluctor tooth

Fault status

⚠️ Status
Camshaft Position Sensor A (Bank 1 or single sensor) — low input detected. The ECM is receiving a signal below expected threshold; possible causes include sensor failure, open or shorted wiring, poor connector contact, or a damaged reluctor/target.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-3.0 hours

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P0340 P0341 P0343 P0016 P0017
413

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