AutoCodes – Chevrolet – P16BF Chevrolet

P16BF Chevrolet Code - Engine Controls Ignition Relay Feedback Circuit 3 High Voltage

Quick Answer

There are 4 ignition voltage circuits supplied to the Engine Control Module (ECM). Common causes include Faulty Engine Controls Ignition Relay, Engine Controls Ignition Relay harness is open or shorted, Engine Controls Ignition Relay 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: P16BF Chevrolet indicates Engine Controls Ignition Relay Feedback Circuit 3 High Voltage.
Common causes: Common causes include Faulty Engine Controls Ignition Relay, Engine Controls Ignition Relay harness is open or shorted, Engine Controls Ignition Relay 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 1,617

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 Jul 26, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P16BF Chevrolet Description

There are 4 ignition voltage circuits supplied to the Engine Control Module (ECM). Three are supplied by the Engine Controls Ignition Relay, and the other is supplied by the ignition main relay. The ECM monitors and compares the ignition voltage supplied by the 2 relays. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the voltage level difference is greater than 3 V between the Engine Controls Ignition Relay feedback circuit 3 and the ignition 1 signal circuit for greater than 1 s.

OBDII Code P16BF Chevrolet - Engine Controls Ignition Relay Feedback Circuit 3 High Voltage - AutoCodes.com — P16BF Chevrolet Code - Engine Controls Ignition Relay Feedback Circuit 3 High Voltage

What does this mean?

What are the Possible Causes of the DTC P16BF Chevrolet?

Faulty Engine Controls Ignition Relay
Engine Controls Ignition Relay harness is open or shorted
Engine Controls Ignition Relay circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P16BF Chevrolet?

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 P16BF Chevrolet 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.

Need more information about the P16BF Chevrolet code?

Need more information on how to fix the P16BF Chevrolet code? Get Access to Factory Service Manuals

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Get the P16BF Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 P16BF Chevrolet Code

1. What are the common symptoms of OBDII code P16BF in a Chevrolet?

The common symptoms of OBDII code P16BF in a Chevrolet may include engine stalling, rough idle, decreased fuel efficiency, and difficulty starting the vehicle.

2. What can cause the Engine Controls Ignition Relay Feedback Circuit 3 High Voltage code in a Chevrolet?

The P16BF code in a Chevrolet is typically triggered by a faulty ignition relay, damaged wiring or connectors in the ignition system, or a malfunctioning PCM (Powertrain Control Module).

3. How serious is the P16BF Chevrolet trouble code?

The P16BF code should be addressed promptly to prevent potential engine performance issues, such as misfires or stalling. Ignoring this code could lead to more severe problems over time.

4. Can I continue driving my Chevrolet with the P16BF trouble code?

It is not recommended to drive your Chevrolet with the P16BF code present, as it can affect the engine's performance and reliability. It's best to address the issue as soon as possible to prevent further damage.

5. How can I diagnose and repair the P16BF code in my Chevrolet?

Diagnosing the P16BF code involves inspecting the ignition relay, checking the wiring and connectors for damage, and testing the PCM for proper functioning. Repairs may include replacing the faulty relay, repairing damaged wiring, or reprogramming the PCM.

6. Will resetting the OBDII system clear the P16BF code in my Chevrolet?

Resetting the OBDII system may temporarily clear the P16BF code, but if the underlying issue is not addressed, the code is likely to reappear. It's important to diagnose and repair the root cause of the problem to prevent future occurrences.

7. Can a DIY enthusiast fix the P16BF code in a Chevrolet?

While some DIY enthusiasts may have the skills to diagnose and repair the P16BF code, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair to ensure the issue is resolved correctly.

8. How much does it cost to fix the P16BF trouble code in a Chevrolet?

The cost of fixing the P16BF code in a Chevrolet can vary depending on the specific cause of the issue, parts needed for repair, and labor costs. It's best to obtain a diagnosis from a mechanic to get an accurate estimate.

9. Is the P16BF Chevrolet trouble code covered under warranty?

If your Chevrolet is still under warranty, the repair for the P16BF code may be covered depending on the warranty terms. Check with your dealership or warranty provider for more information on coverage.

10. How often does the P16BF code occur in Chevrolet vehicles?

The occurrence of the P16BF code in Chevrolet vehicles can vary, but it is not one of the most common OBDII trouble codes. If you are experiencing this issue, it is important to address it promptly to avoid further problems.