AutoCodes – GMC – P163A 2016 GMC Sierra

P163A 2016 GMC Sierra Code - Control Module Fuel Pressure Regulator 1 Control System Circuitry Performance

Quick Answer

This diagnostic applies to internal microprocessor integrity conditions within the Engine Control Module (ECM) or an out-of-range high-pressure fuel pump actuator current. Common causes include Faulty High Pressure Fuel Pump, High Pressure Fuel Pump harness is open or shorted, High Pressure Fuel Pump 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: P163A 2016 GMC Sierra indicates Control Module Fuel Pressure Regulator 1 Control System Circuitry Performance.
Common causes: Common causes include Faulty High Pressure Fuel Pump, High Pressure Fuel Pump harness is open or shorted, High Pressure Fuel Pump 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 144

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Aug 17, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P163A 2016 GMC Sierra Description

This diagnostic applies to internal microprocessor integrity conditions within the Engine Control Module (ECM) or an out-of-range high-pressure fuel pump actuator current. The Diagnostic Trouble Code (DTC) will be set if the ECM detects a condition with the integrated circuits of the High-Pressure Fuel Pump actuator driver module or if the ECM detects that the current used to drive the High-Pressure Fuel Pump actuator is out of range for greater than 4 s.

OBDII Code P163A 2016 GMC Sierra - Control Module Fuel Pressure Regulator 1 Control System Circuitry Performance - AutoCodes.com — P163A 2016 GMC Sierra Code - Control Module Fuel Pressure Regulator 1 Control System Circuitry Performance

What does this mean?

What are the Possible Causes of the DTC P163A 2016 GMC Sierra?

Faulty High Pressure Fuel Pump
High Pressure Fuel Pump harness is open or shorted
High Pressure Fuel Pump circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P163A 2016 GMC Sierra?

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 P163A 2016 GMC Sierra 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 P163A 2016 GMC Sierra code?

Need more information on how to fix the P163A 2016 GMC Sierra code? Get Access to Factory Service Manuals

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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 P163A 2016 GMC Sierra Code

1. What does the OBDII code P163A mean on a 2016 GMC Sierra?

P163A indicates a problem with the Control Module Fuel Pressure Regulator 1 Control System, specifically related to its circuitry performance.

2. What are the common symptoms of the P163A code in a 2016 GMC Sierra?

Symptoms may include a check engine light, reduced engine performance, difficulty starting, poor fuel efficiency, or the engine stalling.

3. What causes the P163A code to appear?

Common causes include a faulty fuel pressure regulator, damaged wiring or connectors in the circuit, a malfunctioning control module, or fuel system contamination.

4. Can I drive my 2016 GMC Sierra with the P163A code?

Driving with this code is not recommended as it can lead to poor engine performance, potential stalling, and further damage to the fuel system.

5. How do I diagnose the P163A code on my GMC Sierra?

Diagnosis involves inspecting the wiring and connectors for damage, testing the fuel pressure regulator, and checking the control module for faults using a diagnostic scanner.

6. What repairs are needed to fix the P163A code?

Repairs may include replacing a faulty fuel pressure regulator, repairing damaged wiring, cleaning or replacing fuel injectors, or reprogramming or replacing the control module.

7. How much does it cost to fix the P163A code on a GMC Sierra?

Repair costs vary depending on the issue but can range from $100 for simple wiring repairs to $500 or more if the fuel pressure regulator or control module needs replacement.

8. Can a dirty fuel system cause the P163A code?

Yes, fuel system contamination, such as clogged fuel lines or injectors, can impact fuel pressure regulation and trigger the code.

9. How can I prevent the P163A code from recurring?

Regular maintenance, such as keeping the fuel system clean and inspecting wiring for wear, can help prevent this code from reappearing.

10. Do I need a professional mechanic to fix the P163A code?

While some repairs like checking wiring may be DIY-friendly, diagnosing and replacing components like the control module or fuel pressure regulator may require a professional.