What are the symptoms of fault code P000B?

• Check Engine Light (MIL) illuminated • Rough idling • Decreased engine performance and throttle response • Reduced fuel economy • Rattle or knocking noise from the cylinder head area

What causes fault code P000B?

• Most likely: Dirty or incorrect engine oil (wrong viscosity or low level) • Likely: Clogged or faulty VVT solenoid (Oil Control Valve) • Possible: Defective camshaft phaser/actuator • Rare: Worn timing belt/chain components or clogged internal engine oil galleries

Powertrain (Engine & Gearbox)Standard EOBD

P000B - Exhaust Camshaft Position Slow Response (Bank 1)

Q: How do you fix fault code P000B?

STEP 1: Check engine oil level and condition. If oil is dirty or overdue for service, perform an oil and filter change immediately using OEM recommended viscosity. STEP 2: Inspect the VVT solenoid connector for oil wicking or corrosion. Measure solenoid resistance (typically 7–12 Ohms at 20°C). STEP 3: Use a scan tool to perform an active test of the solenoid. Monitor live data for camshaft position bank 1 (actual vs. desired). STEP 4: Remove the VVT solenoid and inspect internal screens for sludge or debris. Clean or replace if necessary. STEP 5: If the issue persists, inspect the camshaft phaser (actuator) and the timing belt/chain for proper tension and alignment.

Last updated:1 February 2026

Related:VVT-solenoid, Camshaft Phaser, Oil Pressure Sensor, Motorolja, Camshaft Position Sensor

System

Powertrain (Engine & Gearbox)

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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

P000B is set when the Engine Control Unit (ECU) detects that the exhaust camshaft position for Bank 1 is responding slower than the commanded target value. The system relies on Variable Valve Timing (VVT) technology, using an oil control solenoid to adjust the timing. If there is a delay in the camshaft reaching its target position—due to oil pressure issues, mechanical sluggishness, or electrical resistance—the ECU monitors the deviation over a set period. If the lag exceeds the calibrated threshold (typically measured in milliseconds/degrees per second), the code is stored and the system may enter a reduced power mode.

Possible Causes

Dirty or incorrect engine oil (wrong viscosity or low level)

Clogged or faulty VVT solenoid (Oil Control Valve)

Defective camshaft phaser/actuator

Worn timing belt/chain components or clogged internal engine oil galleries

Symptoms

Check Engine Light (MIL) illuminated

Rough idling

Decreased engine performance and throttle response VIDA.

Reduced fuel economy

Rattle or knocking noise from the cylinder head area

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P000B - Exhaust Camshaft Position Slow Response (Bank 1)

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P000B - Exhaust Camshaft Position Slow Response (Bank 1)

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