P104B Code - Cylinder 4 Oil Supply Solenoid Valve Voltage Out Of Range
Quick Answer
Multi-Air is an electronically controlled variable intake valve phase and lift system. Common causes include Faulty Variable Valve Actuator (VVA) Solenoid, Variable Valve Actuator Solenoid harness is open or shorted, Variable Valve Actuator Solenoid circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P104B indicates Cylinder 4 Oil Supply Solenoid Valve Voltage Out Of Range.
- Common causes
- Common causes include Faulty Variable Valve Actuator (VVA) Solenoid, Variable Valve Actuator Solenoid harness is open or shorted, Variable Valve Actuator Solenoid circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P104B Description
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 PCM calculates that the delay in the measurement of current samples is greater that the required sampling period.
What are the Possible Causes of the DTC P104B?
- 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 DTC P104B?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P104B code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- P104B Chrysler — Cylinder 4 Oil Supply Solenoid Valve Voltage Out Of Range
- P104B Dodge — Cylinder 4 Oil Supply Solenoid Valve Voltage Out Of Range
- P104B Fiat — Cylinder 4 Oil Supply Solenoid Valve Voltage Out Of Range
- P104B Jeep — Cylinder 4 Oil Supply Solenoid Valve Voltage Out Of Range
Frequently Asked Questions about P104B Code
What does the OBDII code P104B mean?
P104B indicates that the voltage for the Cylinder 4 Oil Supply Solenoid Valve is out of the expected range, suggesting an electrical or mechanical issue with the solenoid or its circuit.
What are the common symptoms of code P104B?
Symptoms may include poor engine performance, rough idling, decreased fuel efficiency, illuminated check engine light, or engine misfires.
What causes the P104B code to appear?
Possible causes include a faulty Cylinder 4 Oil Supply Solenoid Valve, damaged wiring or connections, a malfunctioning PCM, or low engine oil levels causing improper solenoid function.
Can low engine oil cause a P104B code?
Yes, low or dirty engine oil can impact oil pressure and solenoid performance, potentially triggering the P104B code.
How do I diagnose a P104B code?
Start by checking oil levels and quality, inspecting the solenoid and its wiring for damage, and using a multimeter to test the voltage at the solenoid connector.
How do I fix the P104B code?
Repairs may involve replacing the Cylinder 4 Oil Supply Solenoid Valve, repairing damaged wiring or connectors, or addressing low or dirty engine oil.
Can I drive with the P104B code?
It's not recommended, as driving with this issue can lead to poor engine performance and potentially cause further damage to the engine.
How much does it cost to repair the P104B code?
Repair costs vary but typically range from $100 to $300, depending on whether the solenoid or wiring needs replacement.
Does the P104B code always mean the solenoid is bad?
No, the issue could also stem from wiring problems, a PCM malfunction, or low oil pressure, so proper diagnosis is essential.
Can a P104B code clear itself?
If the issue was caused by a temporary condition, such as low oil pressure, it may clear itself after addressing the root cause, but resetting the code using a scan tool is often necessary.
Discuss the causes and fixes for P104B OBDII Code
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