P1B03 2016 GMC Sierra Code - Drive Motor Position Sensor Circuit Tracking Lost
Quick Answer
The generator control module also called the starter/generator control module, is comprised of the following three control modules: the hybrid/EV powertrain control module 1, 14 V power module, and the drive motor control module. Common causes include Faulty Starter/Generator, Starter/Generator harness is open or shorted, Starter/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
- P1B03 2016 GMC Sierra indicates Drive Motor Position Sensor Circuit Tracking Lost.
- Common causes
- Common causes include Faulty Starter/Generator, Starter/Generator harness is open or shorted, Starter/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.
Code P1B03 2016 GMC Sierra Description
The generator control module monitors the angular position, speed, and direction of the starter generator rotor based upon the signals of the resolver-type motor 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 starter generator.
At ignition ON, an AC voltage, 10 kHz excitation signal is output to the drive coil. The drive coil excitation signal creates a magnetic field surrounding the two driven coils and the irregular-shaped rotor. The generator 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 generator control module to determine the exact position, speed, and direction of the starter generator rotor. The position sensor is a non-serviceable part of the starter generator.
The Diagnostic Trouble Code (DTC) will be set when the generator control module tracking error is greater than 5 degrees.
What are the Possible Causes of the DTC P1B03 2016 GMC Sierra?
- Faulty Starter/Generator
- Starter/Generator harness is open or shorted
- Starter/Generator circuit poor electrical connection
- Faulty Starter/Generator Control Module
How to Fix the DTC P1B03 2016 GMC Sierra?
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 2016 GMC Sierra 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 2016 GMC Sierra code?
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Frequently Asked Questions about P1B03 2016 GMC Sierra Code
1. What are the common symptoms associated with OBDII code P1B03 in a 2016 GMC Sierra?
Common symptoms include the check engine light coming on, a reduction in vehicle performance, and potential issues with the hybrid drive system.
2. What does the OBDII code P1B03 "Drive Motor Position Sensor Circuit Tracking Lost" indicate in a 2016 GMC Sierra?
This code indicates that the vehicle's onboard computer has detected a problem with the drive motor's position sensor circuit, specifically that tracking has been lost.
3. What are some possible causes of OBDII code P1B03 in a 2016 GMC Sierra?
Potential causes of this code include a faulty drive motor position sensor, damaged wiring or connectors in the sensor circuit, or issues with the drive motor itself.
4. How can I diagnose the cause of OBDII code P1B03 in my 2016 GMC Sierra?
Diagnosis typically involves using a diagnostic scanner to retrieve the specific fault codes, testing the drive motor position sensor and its circuit for continuity and proper voltage, and inspecting the wiring for any damage or loose connections.
5. Can I continue driving my 2016 GMC Sierra with OBDII code P1B03 present?
It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the drive motor or other components of the hybrid system.
6. How can I repair OBDII code P1B03 in my 2016 GMC Sierra?
Repair options may include replacing the drive motor position sensor, repairing or replacing damaged wiring or connectors, or addressing any underlying issues with the drive motor itself.
7. Is it safe to clear the OBDII code P1B03 in my 2016 GMC Sierra using a diagnostic scanner?
Clearing the code temporarily may turn off the check engine light, but if the underlying issue is not resolved, the code is likely to reappear. It is important to diagnose and address the root cause of the code.
8. Will OBDII code P1B03 affect the fuel efficiency of my 2016 GMC Sierra?
Since this code is related to the drive motor position sensor circuit in a hybrid vehicle, it can impact the overall efficiency and performance of the hybrid system, potentially leading to decreased fuel efficiency.
9. Can a DIY enthusiast with basic automotive knowledge repair OBDII code P1B03 in a 2016 GMC Sierra?
While some aspects of diagnosing and repairing this code may be within reach of a DIY enthusiast, it is recommended to consult a professional mechanic or hybrid specialist for a thorough diagnosis and proper repair.
10. How soon should I address OBDII code P1B03 in my 2016 GMC Sierra to prevent further damage?
It is advisable to address this code as soon as it appears to prevent potential damage to the drive motor or other hybrid components. Delaying repairs can lead to more costly repairs down the line.
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