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P0013 — “B” Camshaft Position Actuator Circuit / Open (Bank 1)

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🔧 Code Meaning

P0013 = Exhaust (B) Camshaft Position Actuator Circuit / Open, Bank 1.
This means the VVT (Variable Valve Timing) solenoid or its wiring circuit for the exhaust camshaft on Bank 1 has an electrical fault — typically an open circuit, short, or stuck actuator.

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🚗 Affected Components

🚖Exhaust Camshaft Position Actuator (VVT Solenoid)

🚖VVT Oil Control Valve

🚖Wiring harness & connectors to ECM

🚖Engine Control Module (ECM)

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⚙️ Common Causes

1. Faulty VVT solenoid (actuator)

Internal open circuit or stuck valve

2. Damaged wiring

Broken wire or corroded connector to the solenoid

3. Oil contamination or sludge

Dirty oil blocks oil flow through the solenoid

4. Low or dirty engine oil

VVT system depends on proper oil pressure

5. ECM driver failure

Rare, but possible if all else checks good

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🧰 Step-by-Step Diagnosis

1. Check engine oil

🕛Verify correct oil level and condition

🕛Replace if dirty or sludged

2. Inspect wiring and connector

🕧Disconnect the B camshaft actuator solenoid (Bank 1 = same side as cylinder #1)

➡️Check for:

➡️Broken pins

➡️Corrosion

➡️Oil intrusion

➡️Damaged insulation

3. Test solenoid resistance

🪛Use a multimeter on the solenoid terminals

🪛Typical resistance: 6–12 ohms (varies by engine)

🪛If reading is open (∞) or 0 ohms, replace the solenoid

4. Check circuit power and ground

🕛With ignition ON, one terminal should have battery voltage

🕛The other is the control wire to ECM — check for proper ground switching (use test light or scope)

5. Command the actuator with scan tool (if available)

🚗Use bi-directional control to activate the solenoid

🚗Listen for a click or feel vibration — no sound means stuck or open

6. Replace solenoid if faulty

🕛Clear code, road test, and verify proper cam timing

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🧩 Quick Fix Summary

🫰Possible Cause Fix

Low/dirty oil Change oil & filter
Bad actuator solenoid Replace solenoid
Broken wire / connector Repair wiring
ECM issue Check after all else

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