AutoCodes – GMC – P16D0 GMC

P16D0 GMC Code - Intake Rocker Arm Solenoid Valve 2 Stuck Off

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: P16D0 GMC indicates Intake Rocker Arm Solenoid Valve 2 Stuck Off.
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 1,565

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 P16D0 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 P16D0 GMC - Intake Rocker Arm Solenoid Valve 2 Stuck Off - AutoCodes.com — P16D0 GMC Code - Intake Rocker Arm Solenoid Valve 2 Stuck Off

What does this mean?

What are the Possible Causes of the DTC P16D0 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 P16D0 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 P16D0 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 P16D0 GMC Code

1. What are the common symptoms of OBDII code P16D0 GMC?

The common symptoms of code P16D0 GMC include rough idling, poor engine performance, and an illuminated check engine light.

2. What does the OBDII code P16D0 GMC indicate?

The code P16D0 GMC indicates that the Intake Rocker Arm Solenoid Valve 2 is stuck in the off position, affecting the engine's operation.

3. What are the possible causes of the Intake Rocker Arm Solenoid Valve 2 being stuck off?

Possible causes of the Intake Rocker Arm Solenoid Valve 2 being stuck off include a faulty solenoid valve, wiring issues, or a problem with the engine control module.

4. How can I diagnose the issue related to code P16D0 GMC?

Diagnosing the issue related to code P16D0 GMC involves checking the solenoid valve's electrical connections, testing the valve for proper operation, and inspecting the wiring for any damage.

5. Can I continue driving my vehicle with OBDII code P16D0 GMC?

It is not recommended to continue driving your vehicle with code P16D0 GMC, as it can lead to further engine damage and reduced performance.

6. How can I repair OBDII code P16D0 GMC?

To repair code P16D0 GMC, you may need to replace the Intake Rocker Arm Solenoid Valve 2, repair any damaged wiring, or reset the engine control module.

7. Is it possible to clear the OBDII code P16D0 GMC without fixing the underlying issue?

Clearing the OBDII code P16D0 GMC without fixing the underlying issue may temporarily turn off the check engine light, but the problem will likely reoccur if not addressed.

8. Can a DIY enthusiast fix OBDII code P16D0 GMC at home?

Depending on your technical skills and knowledge, a DIY enthusiast may be able to fix code P16D0 GMC at home by following the repair procedures outlined in the vehicle's service manual.

9. How much does it cost to repair OBDII code P16D0 GMC at a mechanic?

The cost to repair code P16D0 GMC at a mechanic can vary depending on the labor rates, parts needed, and the extent of the repair required. It's advisable to get a few quotes from different mechanics.

10. How can I prevent OBDII code P16D0 GMC from occurring in the future?

To prevent OBDII code P16D0 GMC from occurring in the future, it's essential to perform regular vehicle maintenance, including checking and replacing components like solenoid valves as recommended by the manufacturer.