What causes fault code P005B?

• Most likely: Dirty or contaminated engine oil (clogs VVT solenoid/oil passages) • Likely: Failing exhaust camshaft profile control solenoid (Bank 2) • Possible: Low engine oil pressure preventing hydraulic movement • Possible: Wiring issues (corrosion, open circuit, or short to ground) • Rare: Failed camshaft phaser/actuator (mechanical internal failure) • Rare: Outdated PCM/ECU software

Powertrain (Engine & Gearbox)Standard EOBD

P005B - Exhaust Camshaft Profile Control Circuit Range/Performance (Bank 2)

Q: What are the symptoms of fault code P005B?

• Check Engine Light (MIL) illuminated • Reduced engine performance and poor acceleration • Rough idling or engine stalling • Increased fuel consumption • Audible clicking or tapping noise from the engine top end • Vehicle may enter 'Limp Mode'

Q: How do you fix fault code P005B?

STEP 1: Check engine oil level and condition. VVT systems are highly sensitive to oil quality. Change oil and filter if maintenance is overdue. STEP 2: Inspect the solenoid connector for corrosion or loose pins. Measure solenoid resistance with a multimeter; expected range is typically 7-15 Ohms. Check for 12V supply and ground switching. STEP 3: Use a scan tool to perform a bi-directional active test of the solenoid while the engine is running or in IGN-ON mode. Listen for audible clicks. STEP 4: Remove the solenoid and check for sludge or debris in the micro-filters. Clean or replace the solenoid. STEP 5: If the code persists after solenoid replacement and oil service, perform a mechanical oil pressure test and inspect the camshaft phaser hardware.

Last updated:1 February 2026

Related:VVT Solenoid, Camshaft Position Sensor (CMP), Engine Oil Pressure Sensor, Camshaft Phaser, Engine Oil Filter, ECU/PCM

System

Powertrain (Engine & Gearbox)

Related Fault Codes

P0000

No Diagnostic Trouble Codes (DTC) Present

P0001

Fuel Volume Regulator Control Circuit / Open

P0002

Fuel Volume Regulator Control Circuit Range/Performance

P0003

Fuel Volume Regulator Control Circuit Low

Technical Description

P005B is triggered when the Engine Control Unit (ECU) detects a performance problem or range issue within the exhaust camshaft profile control circuit for Bank 2. This system (often related to VVT or Variable Valve Lift) uses an actuator/solenoid controlled by a PWM signal to switch between camshaft lobes or adjust timing. The ECU monitors the position via the camshaft position sensor (CMP). If the actual position deviates from the commanded position for a specific duration, or if the electrical feedback indicates the solenoid is not moving as expected despite being powered, P005B is stored. Bank 2 refers to the side of the engine that does not contain cylinder #1.

Possible Causes

Dirty or contaminated engine oil (clogs VVT solenoid/oil passages)

Failing exhaust camshaft profile control solenoid (Bank 2)

Low engine oil pressure preventing hydraulic movement

Wiring issues (corrosion, open circuit, or short to ground)

Failed camshaft phaser/actuator (mechanical internal failure)

Outdated PCM/ECU software

Symptoms

Check Engine Light (MIL) illuminated

Reduced engine performance and poor acceleration

Rough idling or engine stalling

Increased fuel consumption

Audible clicking or tapping noise from the engine top end

Vehicle may enter 'Limp Mode'

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P005B - Exhaust Camshaft Profile Control Circuit Range/Performance (Bank 2)

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P005B - Exhaust Camshaft Profile Control Circuit Range/Performance (Bank 2)

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