AutoCodes – Generic – P16F9

P16F9 Code - Control Module Shutdown Performance

Quick Answer

This diagnostic applies to internal microprocessor integrity conditions within the Hybrid Powertrain Control Module (HPCM). Common causes include Faulty Hybrid Powertrain Control Module (HPCM), Hybrid Powertrain Control Module (HPCM) harness is open or shorted, Hybrid Powertrain Control Module (HPCM) 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: P16F9 indicates Control Module Shutdown Performance.
Common causes: Common causes include Faulty Hybrid Powertrain Control Module (HPCM), Hybrid Powertrain Control Module (HPCM) harness is open or shorted, Hybrid Powertrain Control Module (HPCM) 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 6,850

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P16F9 Description

This diagnostic applies to internal microprocessor integrity conditions within the Hybrid Powertrain Control Module (HPCM). The HPCM and each Motor Control Module (MCM) utilize a programmable logic device (PLD) to perform certain input and output functions. The HPCM monitors the ability of the PLD to perform these functions.

OBDII Code P16F9 - Control Module Shutdown Performance - AutoCodes.com — P16F9 Code - Control Module Shutdown Performance

What does this mean?

What are the Possible Causes of the DTC P16F9?

Faulty Hybrid Powertrain Control Module (HPCM)
Hybrid Powertrain Control Module (HPCM) harness is open or shorted
Hybrid Powertrain Control Module (HPCM) circuit poor electrical connection

How to Fix the DTC P16F9?

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 P16F9 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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Need more information on how to fix the P16F9 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P16F9 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P16F9 Acura — ECM Internal Circuit Malfunction Starter Control Circuit Malfunction
P16F9 Buick — Control Module Shutdown Performance
P16F9 Cadillac — Control Module Shutdown Performance
P16F9 Chevrolet — Control Module Shutdown Performance
P16F9 GMC — Control Module Shutdown Performance
P16F9 Honda — ECM Internal Circuit Malfunction Starter Control Circuit Malfunction

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 P16F9 Code

1. What does the OBDII code P16F9 mean?

P16F9 indicates a problem with the Control Module Shutdown Performance, meaning the vehicle's control module is not shutting down or powering down as expected.

2. What are the common symptoms of code P16F9?

Symptoms may include a check engine light, difficulty starting the vehicle, battery drain, or issues with other electronic systems not turning off properly.

3. What causes the P16F9 code to appear?

Common causes include a faulty control module, damaged wiring or connectors, a failing power relay, or software-related issues within the system.

4. Can a weak battery cause the P16F9 code?

Yes, a weak or failing battery can cause improper shutdown of the control module, potentially triggering the P16F9 code.

5. How do I diagnose the P16F9 code?

Start by checking the battery voltage, inspecting the wiring and connectors for damage, and testing the control module power relay. Advanced diagnostics may require a scan tool to monitor power-down sequences.

6. Is it safe to drive with the P16F9 code?

Driving with this code is generally not recommended, as it can lead to battery drain or other electrical system issues, potentially leaving you stranded.

7. How can I fix the P16F9 code?

Repairs may involve replacing a faulty control module, repairing damaged wiring, replacing the power relay, updating module software, or addressing battery-related issues.

8. How much does it cost to repair the P16F9 code?

Repair costs can range from $100 to $1,000 or more, depending on whether the issue is a simple wiring fix or requires control module replacement.

9. Can a software update resolve the P16F9 code?

In some cases, a software update from the manufacturer can resolve the issue if it's related to a programming error in the control module.

10. Do I need a professional mechanic to fix the P16F9 code?

While basic checks like inspecting the battery and fuses can be done at home, diagnosing and repairing control module issues often requires specialized tools and expertise, so consulting a professional mechanic is recommended.