P001B

Code

LAND ROVER P — Powertrain

Intake Camshaft Profile Control Circuit Low - Bank 1

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 10 EN: 19 RU: 15

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Page language: EN

Causes

Failed/shorted intake camshaft profile control solenoid (VVT solenoid)
Damaged, chafed or shorted wiring harness to the solenoid
Corroded/loose connector or poor ground at the solenoid
Open circuit between solenoid and PCM
Low battery voltage or poor power feed to the circuit
Oil contamination or internal failure of the camshaft phaser/actuator

Symptoms

Check Engine Light (MIL) illuminated
Reduced engine performance or power
Rough idle, hesitation or misfire at some conditions
Poor fuel economy
Engine may run in default/limp timing mode
Possible noise from valvetrain if phaser binding

What to check

Read freeze frame and stored PIDs with a scan tool and record related camshaft/cylinder position codes
Check engine oil level, condition and service history
Visually inspect solenoid connector and wiring for damage, corrosion or oil contamination
Backprobe connector and measure battery voltage and ground presence with ignition ON
Command the VVT solenoid on/off with a capable scan tool and observe response
Measure coil resistance of the solenoid and compare to manufacturer spec

Signal parameters

Typical supply voltage: ~Battery voltage (~12 V) at solenoid power feed (verify vehicle-specific)
Control signal: PWM from PCM — voltage varies 0–battery voltage, duty cycle 0–100% (manufacturer-specific)
Typical coil resistance (typical range): ~5–40 Ω (vehicle-specific — check service data)
Command frequency: commonly 20–300 Hz depending on design (verify OEM spec)
Expected behavior when commanded by scan tool: solenoid current draw and change in camshaft timing/position PIDs

Diagnostic algorithm

Retrieve code(s), freeze frame and live camshaft position data. Note oil temperature and engine conditions when code set.
Inspect oil level/quality and service if very dirty or contaminated; low oil or thick/dirty oil can impair VVT operation.
Visually inspect the intake VVT solenoid (Bank 1) connector and harness for damage, oil intrusion or corrosion. Repair or clean as needed.
With ignition ON (engine off) backprobe the connector: verify battery voltage at the power feed and good ground reference.
Measure solenoid coil resistance (engine off, connector disconnected). Compare to OEM spec; an open or shorted coil indicates a bad solenoid.
Command the solenoid ON/OFF with a scan tool while monitoring coil voltage/current and camshaft position PIDs. Lack of change suggests electrical or mechanical failure.
Check continuity between solenoid control pin and PCM; check for short-to-ground or short-to-power using a wiring diagram. Repair any wiring faults.
If wiring and solenoid test good, inspect cam phaser mechanically (if accessible) for seizure or excessive play; replace phaser/actuator if required.
If all components and wiring check good, consider PCM reprogramming or replacement only after verifying all other causes.
Clear codes and perform a road/test cycle to confirm repair. Document test results and parts replaced.

Likely causes

Solenoid coil shorted to ground or internally open
Connector corrosion or broken pin at solenoid harness
Wire rubbed through and contacting engine ground or chassis
Contaminated engine oil causing solenoid/plunger to stick
Failed cam phaser or mechanical seizure preventing response

Fault status

⚠️ Status

P001B — Intake Camshaft Profile Control Circuit Low (Bank 1). PCM detected a low-voltage/short or absence of expected control signal to the intake camshaft profile control (VVT) solenoid on bank 1. May set MIL and force default timing.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0 - 3.0 hours

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P001B — Intake Camshaft Profile Control Circuit Low - Bank 1