AutoCodes – Cadillac – P1B0F Cadillac

P1B0F Cadillac Code - Drive Motor 1 Position Learn Incorrect

Quick Answer

The drive motor position sensor is monitored by the drive motor control module. Common causes include Faulty Drive Motor Generator Power Inverter Module, Drive Motor Generator Power Inverter Module harness is open or shorted, Drive Motor Generator Power Inverter Module 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: P1B0F Cadillac indicates Drive Motor 1 Position Learn Incorrect.
Common causes: Common causes include Faulty Drive Motor Generator Power Inverter Module, Drive Motor Generator Power Inverter Module harness is open or shorted, Drive Motor Generator Power Inverter Module 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 1,075

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B0F Cadillac Description

The drive motor position sensor is monitored by the drive motor control module. The drive motor control module monitors the angular position, speed and direction of the drive motor generator rotor based on 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 rotor. The position sensor is a non-serviceable part of the drive motor.
A measurement called offset is needed for accurate determination of the motor position. Offset is the relationship between the position sensor and the drive motor generator output shaft. Whenever the vehicle is cycled to OFF, the motor control module attempts to learn the offset of the drive motor position sensor by rapidly oscillating the motor and observing the position sensor signals.

OBDII Code P1B0F Cadillac - Drive Motor 1 Position Learn Incorrect - AutoCodes.com — P1B0F Cadillac Code - Drive Motor 1 Position Learn Incorrect

What does this mean?

What are the Possible Causes of the DTC P1B0F Cadillac?

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

How to Fix the DTC P1B0F Cadillac?

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 P1B0F Cadillac 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.

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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 P1B0F Cadillac Code

1. What does the OBDII code P1B0F mean on a Cadillac?

The P1B0F code indicates that the Drive Motor 1 Position Learn process was completed incorrectly or failed to meet the desired parameters.

2. What are the symptoms of code P1B0F on a Cadillac?

Common symptoms include reduced vehicle performance, a check engine light, potential issues with acceleration, and erratic behavior during hybrid or electric operation.

3. What causes code P1B0F to appear on a Cadillac?

This code is typically caused by an incomplete or failed Drive Motor Position Learn procedure, sensor malfunctions, wiring issues, or a problem with the hybrid/EV motor control module.

4. Can I still drive my Cadillac with the P1B0F code?

While the vehicle may still be drivable, operating it with this code can lead to reduced performance and potential long-term damage to the hybrid or electric system.

5. How is the P1B0F code diagnosed on a Cadillac?

A technician will check for related codes, inspect the motor position sensor, verify the integrity of wiring and connectors, and attempt to re-perform the Drive Motor Position Learn procedure.

6. What repairs are needed to fix code P1B0F on a Cadillac?

Repairs may include recalibrating the Drive Motor Position, replacing a faulty motor position sensor, addressing wiring/connectors issues, or reprogramming the motor control module.

7. What is the Drive Motor Position Learn process?

It is a calibration procedure that ensures the motor control module accurately detects the position of the drive motor for optimal performance.

8. Can a low-voltage battery cause the P1B0F code?

Yes, insufficient battery voltage during the Position Learn process can cause the calibration to fail and trigger the P1B0F code.

9. How much does it typically cost to fix a P1B0F code on a Cadillac?

Repair costs can vary widely, ranging from $100 to $500 or more, depending on whether the issue is a simple recalibration or requires sensor/module replacement.

10. Can I clear the P1B0F code without fixing the problem?

Clearing the code without addressing the underlying issue may temporarily turn off the check engine light, but the code is likely to return until the problem is resolved.