AutoCodes – Chevrolet – P1B03 Chevrolet

P1B03 Chevrolet Code - Drive Motor 1 Position Sensor Circuit 2 High Voltage

Quick Answer

The drive motor position sensor is monitored by the motor control module. Common causes include Faulty Drive Motor 1 Position Sensor, Drive Motor 1 Position Sensor harness is open or shorted, Drive Motor 1 Position Sensor 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: P1B03 Chevrolet indicates Drive Motor 1 Position Sensor Circuit 2 High Voltage.
Common causes: Common causes include Faulty Drive Motor 1 Position Sensor, Drive Motor 1 Position Sensor harness is open or shorted, Drive Motor 1 Position Sensor 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 3,261

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 Aug 07, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B03 Chevrolet Description

The drive motor position sensor is monitored by the motor control module. The motor control module monitors the angular position, speed, and direction of the drive motor rotor based upon the signals of the resolver-type position sensor. The position sensor contains a drive coil, two driven coils, and an irregular-shaped metallic rotor. The metallic rotor is mechanically attached to the shaft of the drive motor. At vehicle ON, the motor control module outputs a 7 V AC, 10 kHz excitation signal to the drive coil. The drive coil excitation signal creates a magnetic field surrounding the two driven coils and the irregular-shaped rotor. The motor control module then monitors the two driven coil circuits for return signals, often referred to as Sine and Cosine waveforms, abbreviated SIN and COS. The position of the irregular metallic rotor causes the magnetically induced return signals of the driven coils to vary in size and shape. A comparison of the two driven coil signals allows the motor control module to determine the exact position, speed, and direction of the drive motor rotor. The drive motor 1 position sensor is serviceable separately from the drive motor assembly. The Diagnostic Trouble Code (DTC) will be set when the motor control module is unable to track the motor position based upon the sensor signals.

OBDII Code P1B03 Chevrolet - Drive Motor 1 Position Sensor Circuit 2 High Voltage - AutoCodes.com — P1B03 Chevrolet Code - Drive Motor 1 Position Sensor Circuit 2 High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B03 Chevrolet?

Faulty Drive Motor 1 Position Sensor
Drive Motor 1 Position Sensor harness is open or shorted
Drive Motor 1 Position Sensor circuit poor electrical connection
Faulty Power Inverter Module

How to Fix the DTC P1B03 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 P1B03 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 P1B03 Chevrolet code?

Need more information on how to fix the P1B03 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B03 Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P1B03 2016 Chevrolet Silverado — Drive Motor Position Sensor Circuit Tracking Lost
P1B03 2017 Chevrolet Silverado — Drive Motor Position Sensor Circuit Tracking Lost
P1B03 2018 Chevrolet Silverado — Drive Motor Position Sensor Circuit Tracking Lost

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 P1B03 Chevrolet Code

What does the OBDII code P1B03 mean on a Chevrolet?

The P1B03 code indicates an issue with Drive Motor 1 Position Sensor Circuit 2, specifically detecting a high voltage condition in the circuit.

What are the common symptoms of the P1B03 code in a Chevrolet?

Common symptoms include reduced power, warning lights such as the check engine light or hybrid system alert, and potential issues with vehicle acceleration or performance.

What causes the P1B03 code to appear on a Chevrolet vehicle?

The code is typically caused by a faulty drive motor position sensor, damaged wiring or connectors in the circuit, a short to power, or issues within the hybrid control module.

Can I drive my Chevrolet with the P1B03 code active?

Driving with this code is not recommended, as it can affect the performance of the hybrid or electric drive system, potentially leading to further damage.

How do you diagnose the P1B03 code on a Chevrolet?

Diagnosis involves scanning the system with an OBDII tool, visually inspecting the wiring and connectors, testing the drive motor position sensor, and checking the hybrid control module for faults.

What repairs are needed to fix the P1B03 code in a Chevrolet?

Repairs may include replacing the drive motor position sensor, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the hybrid control module.

How much does it cost to fix the P1B03 code on a Chevrolet?

Repair costs can vary but typically range from $200 to $600 depending on whether it's a wiring repair or sensor replacement. Hybrid control module repairs may cost more.

Can a low battery cause the P1B03 code to trigger?

While a low battery may not directly cause this code, voltage irregularities in the electrical system could potentially contribute to sensor circuit issues.

Is the P1B03 code specific to Chevrolet hybrid or electric models?

Yes, this code is specific to Chevrolet vehicles with hybrid or electric drive systems, as it relates to the drive motor position sensor circuit.

Can clearing the P1B03 code with a scan tool solve the issue?

Clearing the code may temporarily turn off the warning light, but the underlying issue must be addressed to prevent the code from returning.

Discuss the causes and fixes for P1B03 Chevrolet OBDII Code

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