P1D68 Code - Cylinder 4 Oil Supply Solenoid Valve Performance
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
- P1D68 indicates Cylinder 4 Oil Supply Solenoid Valve Performance.
- 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 P1D68 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 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 detects a short circuit condition between the VVA Solenoid Control return circuit and the VVA Solenoid Control signal circuit.
What are the Possible Causes of the DTC P1D68?
- 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 P1D68?
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 P1D68 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
- P1D68 Chrysler — Cylinder 4 Oil Supply Solenoid Valve Performance
- P1D68 Dodge — Cylinder 4 Oil Supply Solenoid Valve Performance
- P1D68 Fiat — Cylinder 4 Oil Supply Solenoid Valve Performance
- P1D68 Jeep — Cylinder 4 Oil Supply Solenoid Valve Performance
Frequently Asked Questions about P1D68 Code
What does the OBDII code P1D68 mean?
Code P1D68 indicates a performance issue with the Cylinder 4 Oil Supply Solenoid Valve, which controls oil flow to optimize engine performance.
What are the symptoms of code P1D68?
Symptoms may include reduced engine performance, poor fuel efficiency, rough idling, or an illuminated check engine light.
What causes the P1D68 code?
Common causes include a malfunctioning oil solenoid valve, clogged oil passages, low oil pressure, or wiring issues affecting the solenoid.
Can low oil levels trigger code P1D68?
Yes, insufficient oil levels or degraded oil can affect the solenoid's performance and lead to this code.
How is code P1D68 diagnosed?
Technicians may inspect the solenoid valve, check oil levels and pressure, look for wiring damage, and perform scans to confirm the root cause.
Can I drive my car with the P1D68 code active?
Driving with this code is not recommended, as it could lead to engine damage or decreased performance if the underlying issue is not resolved.
How do you fix code P1D68?
Repairs may involve replacing the Cylinder 4 Oil Supply Solenoid Valve, cleaning oil passages, addressing wiring issues, or performing an oil change.
Is the P1D68 code specific to certain vehicles?
Yes, this code is manufacturer-specific and commonly appears in vehicles with variable valve timing systems that use oil solenoids.
Does code P1D68 require specialized tools for repair?
Yes, diagnosing and repairing this code typically requires OBDII diagnostic tools, multimeters, and access to the vehicle's service manual.
Can neglecting maintenance lead to code P1D68?
Yes, skipping regular oil changes and using low-quality oil can cause sludge buildup, leading to solenoid valve performance issues.
Discuss the causes and fixes for P1D68 OBDII Code
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