AutoCodes – GMC – P16D3 GMC

P16D3 GMC Code - Intake Rocker Arm Solenoid Valve 2 Control Circuit High 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: P16D3 GMC indicates Intake Rocker Arm Solenoid Valve 2 Control Circuit High 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 1,065

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 P16D3 GMC 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 P16D3 GMC - Intake Rocker Arm Solenoid Valve 2 Control Circuit High Voltage - AutoCodes.com — P16D3 GMC Code - Intake Rocker Arm Solenoid Valve 2 Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P16D3 GMC?

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 P16D3 GMC?

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 P16D3 GMC 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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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 P16D3 GMC Code

1. What are the common symptoms of OBDII code P16D3 GMC related to the Intake Rocker Arm Solenoid Valve 2 Control Circuit High Voltage?

- Common symptoms include rough idling, engine misfires, decreased fuel efficiency, and illuminated Check Engine Light.

2. What are the possible causes of OBDII code P16D3 GMC indicating a high voltage issue with the Intake Rocker Arm Solenoid Valve 2 control circuit?

- Possible causes include a faulty intake rocker arm solenoid valve, damaged wiring or connectors, issues with the engine control module (ECM), or a short circuit.

3. How can I diagnose the source of the high voltage issue triggering OBDII code P16D3 GMC for the Intake Rocker Arm Solenoid Valve 2 control circuit?

- Diagnosis may involve inspecting the solenoid valve, checking the wiring and connectors for damage, testing the voltage supply to the solenoid, and using a scan tool to monitor the valve's operation.

4. What are the recommended repair tips for resolving OBDII code P16D3 GMC associated with the Intake Rocker Arm Solenoid Valve 2 Control Circuit High Voltage?

- Repair tips may include replacing the faulty solenoid valve, repairing or replacing damaged wiring or connectors, resetting the ECM, and clearing the trouble codes.

5. Can driving with OBDII code P16D3 GMC related to the Intake Rocker Arm Solenoid Valve 2 Control Circuit High Voltage cause further damage to the vehicle?

- Continuing to drive with this code may lead to poor engine performance, potential damage to other engine components, and increased fuel consumption.

6. How crucial is it to address OBDII code P16D3 GMC for the Intake Rocker Arm Solenoid Valve 2 Control Circuit High Voltage promptly?

- It is recommended to address this code promptly to prevent further engine damage, ensure optimal vehicle performance, and avoid potential safety issues on the road.

7. Is it possible to clear OBDII code P16D3 GMC related to the Intake Rocker Arm Solenoid Valve 2 Control Circuit High Voltage without fixing the underlying issue?

- Clearing the code without resolving the underlying issue may temporarily turn off the Check Engine Light, but the problem will likely reoccur, leading to potential long-term consequences.

8. How much does it typically cost to repair OBDII code P16D3 GMC for the Intake Rocker Arm Solenoid Valve 2 Control Circuit High Voltage?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve a few hundred dollars for parts and labor at a repair shop.

9. Are there any preventative maintenance steps I can take to reduce the likelihood of encountering OBDII code P16D3 GMC related to the Intake Rocker Arm Solenoid Valve 2 Control Circuit High Voltage?

- Regularly scheduled maintenance, such as checking and replacing worn components, monitoring engine performance, and addressing any unusual symptoms promptly, can help prevent this issue.