AutoCodes – Chevrolet – P16BD Chevrolet

P16BD Chevrolet Code - Engine Controls Ignition Relay Feedback Circuit 3 Low 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: P16BD Chevrolet indicates Engine Controls Ignition Relay Feedback Circuit 3 Low 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 833

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 P16BD 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 P16BD Chevrolet - Engine Controls Ignition Relay Feedback Circuit 3 Low Voltage - AutoCodes.com — P16BD Chevrolet Code - Engine Controls Ignition Relay Feedback Circuit 3 Low Voltage

What does this mean?

What are the Possible Causes of the DTC P16BD 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 P16BD 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 P16BD 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 P16BD Chevrolet code?

Need more information on how to fix the P16BD Chevrolet code? Get Access to Factory Service Manuals

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Get the P16BD 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 P16BD Chevrolet Code

1. What are the common symptoms of OBDII code P16BD in a Chevrolet related to the Engine Controls Ignition Relay Feedback Circuit 3 Low Voltage?

- Common symptoms include rough engine idling, poor acceleration, and potential stalling of the vehicle.

2. What are the typical causes of OBDII code P16BD in a Chevrolet?

- The code P16BD in a Chevrolet is usually caused by a faulty ignition relay, damaged wiring in the ignition relay circuit, or a malfunctioning PCM.

3. How can I diagnose the OBDII code P16BD in a Chevrolet?

- Diagnosing the code requires using an OBDII scanner to read the code and then inspecting the ignition relay, wiring, and connections for any visible damage or issues.

4. Can a DIY enthusiast repair OBDII code P16BD in a Chevrolet?

- While some DIY enthusiasts may be able to replace a faulty ignition relay or repair damaged wiring, diagnosing and fixing the underlying issue causing the code may require professional help.

5. What are the potential risks of ignoring OBDII code P16BD in a Chevrolet?

- Ignoring the code can lead to further damage to the engine and other components, potentially resulting in more expensive repairs down the line.

6. Are there any tips for preventing OBDII code P16BD from occurring in a Chevrolet?

- Regular maintenance and inspections of the ignition system, including the ignition relay and wiring, can help prevent the occurrence of code P16BD in a Chevrolet.

7. How much does it typically cost to repair OBDII code P16BD in a Chevrolet?

- The cost of repairing code P16BD in a Chevrolet can vary depending on the extent of the issue and whether professional help is required. It is recommended to get estimates from trusted mechanics.

8. Can OBDII code P16BD in a Chevrolet cause permanent damage to the engine?

- While the code itself may not cause immediate permanent damage, ignoring the underlying issue that triggered the code can potentially lead to engine damage over time.

9. Is it safe to continue driving a Chevrolet with OBDII code P16BD present?

- It is not recommended to continue driving a Chevrolet with the code P16BD present, as it can affect the vehicle's performance and lead to further issues if left unaddressed.

10. How long does it typically take to repair OBDII code P16BD in a Chevrolet?

- The repair time for code P16BD in a Chevrolet can vary depending on the exact cause of the issue and the availability of parts. It is best to consult with a mechanic for a more accurate timeframe.