P05CF

Symptoms

• The Check Engine light comes on mainly during cold starts.
• Uneven engine operation on bank 2 side during warm-up
• Delayed warm-up of the left (right) side of the engine
• Increased emissions in the first minutes after startup
• Code can be combined with P05CE or P05CD

Causes

• Poor quality motor oil or inappropriate viscosity
• Exhaust camshaft VVT solenoid fouled Bank 2
• Wear of the bank 2 exhaust shaft phase shifter
• Insufficient oil pressure (especially with all four codes)
• Bank 2 (exhaust) camshaft position sensor malfunction

How to Fix

1. Immediately check the quality and level of engine oil; if the viscosity does not match, replace it
2. Read all error codes - the presence of P05CC+P05CD+P05CE+P05CF indicates a common cause (oil, pump)
3. With P05CF isolated: Locate Bank 2 Exhaust Shaft VVT Solenoid on Engine Diagram
4. Check the electrical resistance of the solenoid (7–12 Ohms); wash or replace
5. Check oil pressure during cold start: normal - usually from 0.3 bar at idle to 3-4 bar at 3000 rpm
6. Replace the bank 2 exhaust shaft phase shifter if the code remains after flushing the solenoid

Related codes

Error P05CF by Vehicle Brand