AutoCodes – Saturn – P1B04 Saturn

P1B04 Saturn Code - Drive Motor 2 Position Sensor Circuit Loss of Tracking

Quick Answer

The drive motor generator position sensor is monitored by the motor control module. Common causes include Faulty Drive Motor Generator, Drive Motor Generator harness is open or shorted, Drive Motor Generator 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: P1B04 Saturn indicates Drive Motor 2 Position Sensor Circuit Loss of Tracking.
Common causes: Common causes include Faulty Drive Motor Generator, Drive Motor Generator harness is open or shorted, Drive Motor Generator 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 1,003

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 Mar 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B04 Saturn Description

The drive motor generator position sensor is monitored by the motor control module. The motor control module monitors the angular position, speed and direction of the drive motor generator 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 generator. At vehicle ON, the motor control module outputs a 7 volt 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 a return signal. 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 coils signals allows the motor control module to determine the exact position, speed and direction of the drive motor generator rotor. The position sensor is a non-serviceable part of the drive motor generator.

OBDII Code P1B04 Saturn - Drive Motor 2 Position Sensor Circuit Loss of Tracking - AutoCodes.com — P1B04 Saturn Code - Drive Motor 2 Position Sensor Circuit Loss of Tracking

What does this mean?

What are the Possible Causes of the DTC P1B04 Saturn?

Faulty Drive Motor Generator
Drive Motor Generator harness is open or shorted
Drive Motor Generator circuit poor electrical connection

How to Fix the DTC P1B04 Saturn?

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 P1B04 Saturn 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 P1B04 Saturn 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.

Frequently Asked Questions about P1B04 Saturn Code

1. What are the common symptoms of OBDII code P1B04 on a Saturn related to the Drive Motor 2 Position Sensor Circuit Loss of Tracking?

- Common symptoms include loss of power, poor acceleration, and potential issues with the vehicle's electric drive system.

2. What are the possible causes of the OBDII code P1B04 on a Saturn indicating Drive Motor 2 Position Sensor Circuit Loss of Tracking?

- Possible causes may include a faulty drive motor position sensor, damaged wiring or connectors in the circuit, or issues with the drive motor itself.

3. How can I diagnose the OBDII code P1B04 on my Saturn for Drive Motor 2 Position Sensor Circuit Loss of Tracking?

- Diagnosis usually involves using a diagnostic scanner to read the code, checking the drive motor position sensor, inspecting the wiring and connectors for damage, and testing the drive motor's functionality.

4. Can I still drive my Saturn if the OBDII code P1B04 for Drive Motor 2 Position Sensor Circuit Loss of Tracking appears?

- It is not recommended to drive your Saturn with this code present, as it can lead to further damage to the electric drive system and potentially unsafe driving conditions.

5. How can I repair the OBDII code P1B04 on my Saturn related to Drive Motor 2 Position Sensor Circuit Loss of Tracking?

- Repair typically involves replacing the faulty drive motor position sensor, repairing any damaged wiring or connectors, and ensuring the drive motor is functioning correctly.

6. Is it possible to clear the OBDII code P1B04 on a Saturn for Drive Motor 2 Position Sensor Circuit Loss of Tracking without fixing the issue?

- While you can clear the code temporarily, it is important to address the underlying problem to prevent further damage and ensure the vehicle operates safely.

7. Are there any DIY tips for troubleshooting the OBDII code P1B04 on a Saturn for Drive Motor 2 Position Sensor Circuit Loss of Tracking?

- DIY tips may include visually inspecting the wiring and connectors for damage, ensuring proper connections, and checking the drive motor position sensor for any obvious issues.

8. How much does it typically cost to repair the OBDII code P1B04 on a Saturn indicating Drive Motor 2 Position Sensor Circuit Loss of Tracking?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can the OBDII code P1B04 on a Saturn for Drive Motor 2 Position Sensor Circuit Loss of Tracking be intermittent?

- Yes, the code can sometimes be intermittent, especially if the issue is related to loose connections or sporadic sensor malfunctions. It is still important to address the problem promptly.

10. Is it necessary to take my Saturn to a dealership for repair if the OBDII code P1B04 for Drive Motor 2 Position Sensor Circuit Loss of Tracking appears?

- While a dealership may have specialized knowledge and tools for Saturn vehicles, you can also seek assistance from an experienced independent mechanic or electric vehicle specialist for diagnosis and repair.