AutoCodes – Generic – P16D2

P16D2 Code - Intake Rocker Arm Solenoid Valve 2 Control Circuit Low Voltage

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: P16D2 indicates Intake Rocker Arm Solenoid Valve 2 Control Circuit Low Voltage.
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 2,916

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 P16D2 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 P16D2 - Intake Rocker Arm Solenoid Valve 2 Control Circuit Low Voltage - AutoCodes.com — P16D2 Code - Intake Rocker Arm Solenoid Valve 2 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P16D2?

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 P16D2?

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 P16D2 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

P16D2 Buick — Intake Rocker Arm Solenoid Valve 2 Control Circuit Low Voltage
P16D2 Cadillac — Intake Rocker Arm Solenoid Valve 2 Control Circuit Low Voltage
P16D2 Chevrolet — Intake Rocker Arm Solenoid Valve 2 Control Circuit Low Voltage
P16D2 GMC — Intake Rocker Arm Solenoid Valve 2 Control Circuit Low Voltage

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 P16D2 Code

1. What are the common symptoms of OBDII code P16D2?

- Common symptoms of code P16D2 may include rough idling, decreased engine performance, stalling, and illuminated Check Engine Light.

2. What does OBDII code P16D2 indicate?

- OBDII code P16D2 indicates a low voltage condition in the control circuit of the Intake Rocker Arm Solenoid Valve 2.

3. What are possible causes of OBDII code P16D2?

- Possible causes of code P16D2 include a faulty intake rocker arm solenoid valve, damaged wiring or connectors, low oil level, or issues with the engine control module.

4. How can I diagnose the cause of OBDII code P16D2?

- Diagnosing code P16D2 may involve visually inspecting wiring and connectors, testing the intake rocker arm solenoid valve, checking oil levels, and using a scan tool to analyze data.

5. Can I still drive my vehicle with OBDII code P16D2?

- It is not recommended to drive your vehicle with code P16D2 present, as it can lead to further engine damage and potential safety hazards.

6. How can I repair OBDII code P16D2?

- Repairing code P16D2 may involve replacing the intake rocker arm solenoid valve, repairing damaged wiring or connectors, ensuring proper oil levels, or reprogramming the engine control module.

7. Can I reset the Check Engine Light caused by OBDII code P16D2?

- Resetting the Check Engine Light after repairing the issue causing code P16D2 can be done using an OBDII scan tool or by disconnecting the vehicle's battery for a few minutes.

8. How urgent is it to address OBDII code P16D2?

- It is important to address code P16D2 promptly to prevent potential engine damage, poor performance, and safety risks while driving.

9. Are there any maintenance tips to prevent OBDII code P16D2 from occurring?

- Regularly checking and maintaining the engine's components, including the intake rocker arm solenoid valve, wiring, and oil levels, can help prevent code P16D2 from occurring.

10. Can a mechanic help me diagnose and repair OBDII code P16D2?

- Yes, a qualified mechanic can diagnose the issue causing code P16D2 using specialized tools and knowledge, and then perform the necessary repairs to resolve the problem.