AutoCodes – Chevrolet – P1633 Chevrolet

P1633 Chevrolet Code - Ignition Supply Power Circuit Low Voltage

Quick Answer

With the key on, no Class 2 serial data received, the Powertrain Control Module (PCM) detects an improper Supplement Power Circuit (Circuit 0) voltage Common causes include Low battery voltage, Blown fuse. 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: P1633 Chevrolet indicates Ignition Supply Power Circuit Low Voltage.
Common causes: Common causes include Low battery voltage, Blown fuse.
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 15,980

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 Sep 02, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
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Code P1633 Chevrolet Description

With the key on, no Class 2 serial data received, the Powertrain Control Module (PCM) detects an improper Supplement Power Circuit (Circuit 0) voltage

OBDII Code P1633 Chevrolet - Ignition Supply Power Circuit Low Voltage - AutoCodes.com — P1633 Chevrolet Code - Ignition Supply Power Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1633 Chevrolet?

Low battery voltage
Blown fuse

How to Fix the DTC P1633 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 P1633 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 P1633 Chevrolet code?

Need more information on how to fix the P1633 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

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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.