P0339

Code

LAND ROVER P — Powertrain

Crankshaft position sensor Intermittent circuit

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 32 EN: 43 RU: 27

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Page language: EN

Causes

Damaged/crushed wiring or broken conductor in CKP harness
Corroded or loose CKP sensor connector or terminals
Faulty/cracked/crushed CKP sensor (Hall or VR type)
Damaged reluctor tone wheel or missing teeth
Intermittent short to battery or ground in signal or reference wire
Poor ground or reference voltage to the sensor

Symptoms

Malfunction Indicator Lamp (MIL) may illuminate intermittently
Intermittent rough idle, misfire or hesitation
Engine may stall or hesitate unexpectedly
Intermittent no-crank/no-start or hard starting
Irregular tachometer or erratic engine RPM reading
Reduced engine performance or limp-home mode in some models

What to check

Read stored freeze-frame and freeze counts; note conditions when fault set (RPM, temp, speed)
Inspect CKP sensor connector for corrosion, bent pins, water intrusion and secure fit
Visually inspect wiring along harness for chafe, pinches, heat damage and repairs
Wiggle test wiring/connectors while monitoring live CKP data or oscilloscope for intermittent changes
Back-probe sensor connector to verify reference voltage, ground and signal with key on/crank
Use an oscilloscope to check waveform quality at the sensor and at the PCM pin while cranking and running

Signal parameters

Hall-effect sensor: digital square-wave signal, ~0 to +5V (vehicle-specific), frequency proportional to engine speed; clean, consistent transitions expected
Variable reluctance (VR) sensor: AC sine waveform amplitude rises with rpm; should produce measurable AC voltage when cranking
Reference voltage: typically a stable ~5V supply from PCM to sensor (if Hall type); verify with DMM/oscilloscope
Ground: low-resistance connection to chassis/PCM ground; poor ground causes signal dropouts
Intermittent symptoms often visible as dropped pulses, jittered waveform edges or complete signal loss on a scope

Diagnostic algorithm

Retrieve all stored DTCs and freeze frame data. Note conditions (rpm, load, temp) when P0339 was set.
Perform visual inspection of CKP sensor, connector, harness routing and reluctor/tone wheel. Repair any obvious damage.
Clear the code, then attempt to reproduce by cranking/starting and driving while monitoring live CKP RPM and sync data.
Back-probe connector: with key on/crank check reference voltage (if applicable), ground continuity and signal presence with DMM.
Use an oscilloscope to view the CKP waveform at the sensor and at the PCM input while cranking and running. Look for missing pulses, noise, collapsing amplitude or intermittent dropouts.
Perform a wiggle test: flex wiring and connectors while watching live data/scope to localize intermittent break or short.
Check continuity and insulation between sensor wires and PCM; check for short to ground or battery. Repair any damaged wiring.
Inspect tone wheel/reluctor for damage, missing teeth, or loose fit; correct or replace as necessary.
If wiring and reluctor are good but signal is still intermittent, substitute a known-good CKP sensor or test with bench/vehicle swap if available.
If new sensor and wiring are good but fault persists at PCM pin, verify PCM grounds and power. Consider PCM input fault if all upstream checks pass.
After repairs, clear codes and re-test under the conditions that originally set the fault to confirm repair.

Likely causes

Wiring or connector corrosion at the sensor (most common on intermittent faults)
Sensor internal intermittent failure (thermal or vibration related)
Reluctor damage or foreign debris causing intermittent missing teeth
Intermittent open or short in signal/return wires due to chafing
Poor sensor supply/ground at PCM (loose connector or damaged pin)

Fault status

⚠️ Status

Intermittent crankshaft position sensor circuit fault detected. MIL may be set; fault stored as intermittent until confirmed or cleared. Can cause erratic RPM signal, misfire, stall or no-start.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours

Repair manuals

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P0339 — Crankshaft position sensor Intermittent circuit