P1340

Code

LAND ROVER P — Powertrain

Failure in the position sensor of camshaft 2

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 19 EN: 30 RU: 30

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Page language: EN

Causes

Faulty camshaft position sensor (camshaft 2)
Damaged wiring or broken/shorted connector to the CMP sensor
Corroded or loose connector or poor pin contact
Oil contamination or debris interfering with sensor
Failed camshaft phaser / variable timing actuator or stuck timing chain/tensioner
PCM hardware or software fault (less common)

Symptoms

Check Engine MIL illuminated
Rough idle, misfire or poor running
Hard starting or no start condition
Reduced engine power or limp-home performance
Intermittent stalling
Reduced fuel economy and increased emissions

What to check

Read freeze frame data and other stored codes (CKP/CMP codes) before clearing
Inspect sensor connector for corrosion, oil, bent pins, or water ingress
Visually inspect CMP sensor harness for chafing, breaks, or heat damage
Backprobe sensor connector and check reference voltage, ground and signal with key on/engine cranking
Check for continuity and shorts to ground or battery on the sensor wiring
Capture CMP signal with a scope and compare to CKP (crank) waveform for correlation

Signal parameters

CMP signal type depends on sensor design: Hall/PNP typically a square‑wave 0–5 V (or up to vehicle system voltage) with clear transitions; VR-type produces an AC sine/oscillating voltage.
Signal frequency and pulse pattern vary with engine speed; frequency increases proportionally with RPM.
Consistent amplitude and clean edges (Hall) or consistent AC amplitude (VR) are expected without dropouts or intermittent gaps.
CMP waveform must correlate to CKP waveform — phase and timing relationship should match factory reference for cam vs crank position.

Diagnostic algorithm

Retrieve DTCs and freeze‑frame; note operating conditions when fault set.
Inspect connector and wiring at camshaft 2 sensor. Repair any damage and reseat connector.
With key on, backprobe sensor: verify reference voltage (if applicable), ground continuity, and signal presence while cranking.
Use an oscilloscope to view CMP waveform; compare to CKP waveform for expected timing relationship and signal integrity.
If signal missing or erratic, check for opens/shorts: measure resistance between sensor and PCM connector pins; wiggle harness while monitoring signal.
If wiring and supply are good, replace the camshaft 2 position sensor with a known good unit and recheck.
If new sensor does not restore proper signal, inspect cam phaser/timing chain and mechanical timing. Repair timing components as required.
Check for any applicable ECU software updates or TSBs and consider PCM test/replacement only after wiring, sensor, and mechanical checks are complete.
Clear codes and perform a road/drive cycle to confirm the fault does not return.

Likely causes

Sensor failure (most common)
Open/short in sensor harness or pin corrosion
Connector pushed partially out / poor connection
Mechanical timing issue (worn chain, broken tooth, phaser failure)
Contaminated sensor from oil sludge or metal debris

Fault status

⚠️ Status

Camshaft 2 position sensor circuit malfunction: PCM detected an absent, intermittent, or invalid camshaft 2 position signal or loss of correlation with the crankshaft. Fault will set MIL and may cause driveability restrictions.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0–3.0 hours

Repair manuals

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Browse 160 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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P1340 — Failure in the position sensor of camshaft 2