AutoCodes – Generic – P16D1

P16D1 Code - Intake Rocker Arm Solenoid Valve 2 Stuck On

Quick Answer

The rocker arm actuator system enables the Engine Control Module (ECM) to change the camshaft lift and duration while the engine is operating. Common causes include Faulty Intake Rocker Arm Solenoid Valve 2, Intake Rocker Arm Solenoid Valve 2 harness is open or shorted, Intake Rocker Arm Solenoid Valve 2 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: P16D1 indicates Intake Rocker Arm Solenoid Valve 2 Stuck On.
Common causes: Common causes include Faulty Intake Rocker Arm Solenoid Valve 2, Intake Rocker Arm Solenoid Valve 2 harness is open or shorted, Intake Rocker Arm Solenoid Valve 2 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.

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Code Popularity 5,365

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 10, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P16D1 Description

The rocker arm actuator system enables the Engine Control Module (ECM) to change the camshaft lift and duration while the engine is operating. The camshaft has 3 lobes for each intake valve. The inner lobe is for low lift and the 2 outer lobes are for high lift. The rocker arm solenoid valve controls the 2-step lift by controlling the oil flow to the rocker arm. In default mode, a locking pin locks the inner and outer mechanisms of the rocker arm together to provide high lift. When low lift is commanded, oil pressure retracts a locking pin within the rocker arm.
The rocker arm solenoid valve receives a signal from the ECM. The ECM controls the rocker arm solenoid valve by supplying a 12 V PWM signal. The ECM supplies a ground to the low reference circuit.

OBDII Code P16D1 - Intake Rocker Arm Solenoid Valve 2 Stuck On - AutoCodes.com — P16D1 Code - Intake Rocker Arm Solenoid Valve 2 Stuck On

What does this mean?

What are the Possible Causes of the DTC P16D1?

Faulty Intake Rocker Arm Solenoid Valve 2
Intake Rocker Arm Solenoid Valve 2 harness is open or shorted
Intake Rocker Arm Solenoid Valve 2 circuit poor electrical connection

How to Fix the DTC P16D1?

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 P16D1 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

P16D1 Buick — Intake Rocker Arm Solenoid Valve 2 Stuck On
P16D1 Cadillac — Intake Rocker Arm Solenoid Valve 2 Stuck On
P16D1 Chevrolet — Intake Rocker Arm Solenoid Valve 2 Stuck On
P16D1 GMC — Intake Rocker Arm Solenoid Valve 2 Stuck On

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P16D1 Code

1. What are common symptoms of OBDII code P16D1 Intake Rocker Arm Solenoid Valve 2 Stuck On?

- Common symptoms include rough idle, loss of power, engine misfires, and illuminated Check Engine Light.

2. What can cause the OBDII code P16D1 to trigger?

- The code can be triggered by a faulty intake rocker arm solenoid valve, electrical issues, or mechanical problems within the valve system.

3. How can I diagnose the issue related to code P16D1?

- Diagnosis typically involves using a scan tool to read the code, checking the intake rocker arm solenoid valve for proper operation, and inspecting related wiring and connectors.

4. Is it safe to drive with the P16D1 code active?

- It is generally not recommended to drive with the code active, as it can lead to further engine damage and reduced performance over time.

5. Can a dirty engine oil lead to the P16D1 code?

- Yes, dirty or contaminated engine oil can affect the operation of the intake rocker arm solenoid valve and potentially trigger the P16D1 code.

6. How can I repair the Intake Rocker Arm Solenoid Valve 2 Stuck On issue?

- Repair options may include cleaning or replacing the intake rocker arm solenoid valve, repairing any damaged wiring or connectors, or addressing underlying mechanical issues.

7. Should I reset the code after repairing the issue?

- Yes, it is recommended to clear the code after repairing the problem to see if it returns, indicating whether the issue has been successfully resolved.

8. Can a malfunctioning intake rocker arm solenoid valve affect fuel efficiency?

- Yes, a malfunctioning valve can impact fuel efficiency due to improper air-fuel mixture control, potentially leading to decreased mileage.

9. How much does it typically cost to repair the P16D1 code related to the intake rocker arm solenoid valve?

- The cost of repair can vary depending on the extent of the issue, but it may range from $100 to $300 for parts and labor.

10. Can a DIY enthusiast fix the P16D1 code issue at home?

- Depending on their skill level, DIY enthusiasts may be able to address the issue by following repair guides or tutorials, but professional diagnosis and repair are recommended for complex problems.