Engine-Codes - Generic - P104C

P104C Code - Cylinder 4 Oil Supply Solenoid Valve Overcurrent

- Code Popularity: 5,045 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

What are the Possible Causes of the Code P104C?

  • Faulty Variable Valve Actuator (VVA) Solenoid
  • Variable Valve Actuator Solenoid harness is open or shorted
  • Variable Valve Actuator Solenoid circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)

How to Fix the P104C Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the Cost to Diagnose the Code P104C?

Labor: 1.0

The cost to diagnose the P104C code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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What are Code P104C Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P104C Code Mean?

Multi-Air is an electronically controlled variable intake valve phase and lift system. Unlike conventional intake valve phase and lift system which controls all the cylinder intake valves simultaneously and in the same proportion; Multi-Air, through the use of an electronically controlled hydraulic link between the camshaft and intake valve, allows for each intake valve to be controlled independently. The valve lift and timing can be adjusted infinitely.
The Multi-Air valve train has a mechanical camshaft lobe acting on a hydraulic pump located between the camshaft intake lobe and the intake valve. The pump provides oil under pressure to a two-way electro-hydraulic solenoid valve called the Variable Valve Actuator (VVA) Solenoid. The VVA Solenoid is electronically controlled during the specific intake cam lobe event by the Powertrain Control Module (PCM). During the event, the VVA Solenoid is commanded to either hold oil pressure or bleed oil. The Variable Valve Actuator (VVA) Solenoid is a normally open solenoid. The PCM provides 12 volts to close the solenoid. The position of the VVA Solenoid determines the intake valve timing and lift. This change on valve action is similar to creating a change in the camshaft lobe profile affecting the lift and duration of the valve opening. The Diagnostic Trouble Code (DTC) will be set when the Variable Valve Actuator (VVA) solenoid current feedback level in voltage is out of range.

P104C Code - Cylinder 4 Oil Supply Solenoid Valve Overcurrent

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Code P104C Information for Specific Makes

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