AutoCodes – Generic – P063D

P063D Code - Generator Voltage Sense Circuit High

Quick Answer

The Powertrain Control Module (PCM) monitors the Generator (Alternator) voltage output. Common causes include Faulty Alternator, Alternator harness is open or shorted, Alternator 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
P063D indicates Generator Voltage Sense Circuit High.
Common causes
Common causes include Faulty Alternator, Alternator harness is open or shorted, Alternator 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 7,997
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 01, 2019
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Code P063D Description

The Powertrain Control Module (PCM) monitors the Generator (Alternator) voltage output. The PCM sets the OBDII code if the alternator output voltage is more than the Battery feed circuit voltage.
OBDII Code P063D - Generator Voltage Sense Circuit High - AutoCodes.com
P063D Code - Generator Voltage Sense Circuit High

What are the Possible Causes of the DTC P063D?

  • Faulty Alternator
  • Alternator harness is open or shorted
  • Alternator circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)

How to Fix the DTC P063D?

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 P063D 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 P063D code?

Need more information on how to fix the P063D code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P063D code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

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 P063D Code

1. What are common symptoms of OBDII code P063D (Generator Voltage Sense Circuit High)?

- Common symptoms include battery warning light illuminated on the dashboard, dimming or flickering lights, and issues with electrical components.

2. What can cause the OBDII code P063D to trigger?

- The code P063D can be triggered by a faulty generator, damaged wiring in the voltage sense circuit, or a malfunctioning generator voltage sensor.

3. How can I diagnose the cause of OBDII code P063D?

- To diagnose the cause of code P063D, you can use a diagnostic scan tool to read the code and perform a thorough inspection of the generator, wiring, and voltage sensor.

4. Can driving with OBDII code P063D cause further damage to my vehicle?

- Driving with code P063D can potentially lead to a drained battery, electrical system malfunctions, and in some cases, stalling of the vehicle. It is recommended to address the issue promptly.

5. What is the typical repair for OBDII code P063D?

- The typical repair for code P063D involves inspecting and replacing the faulty generator, repairing damaged wiring, or replacing the defective generator voltage sensor.

6. Are there any DIY tips for fixing OBDII code P063D?

- While diagnosing and repairing code P063D may require advanced knowledge and tools, you can start by checking the generator connections and inspecting the wiring for any visible damage.

7. How much does it cost to repair OBDII code P063D at a mechanic?

- The cost of repairing code P063D at a mechanic can vary depending on the extent of the issue, the labor rates, and the cost of parts. It is recommended to get a few quotes from different repair shops.

8. Can OBDII code P063D be a false alarm?

- While it is possible for OBDII codes to trigger intermittently, code P063D usually indicates a genuine issue with the generator voltage sense circuit that should be addressed.

9. Will resetting the OBDII code P063D make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not fixed, the code is likely to reappear once the vehicle's computer detects the problem again.

10. Is it safe to drive with OBDII code P063D?

- It is not recommended to drive with code P063D as it indicates a potential issue with the electrical system that could lead to further complications or breakdowns.

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