P1B15 GMC Code - Regenerative Braking Torque Request Signal Message Counter Incorrect
Quick Answer
This diagnostic applies to internal microprocessor integrity conditions within the hybrid powertrain control module. Common causes include Reprogram Motor Generator Power Inverter Module, Faulty Motor Generator Power Inverter Module, Motor Generator Power Inverter Module harness is open or shorted. 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
- P1B15 GMC indicates Regenerative Braking Torque Request Signal Message Counter Incorrect.
- Common causes
- Common causes include Reprogram Motor Generator Power Inverter Module, Faulty Motor Generator Power Inverter Module, Motor Generator Power Inverter Module harness is open or shorted.
- 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 P1B15 GMC Description
What are the Possible Causes of the DTC P1B15 GMC?
- Reprogram Motor Generator Power Inverter Module
- Faulty Motor Generator Power Inverter Module
- Motor Generator Power Inverter Module harness is open or shorted
- Motor Generator Power Inverter Module circuit poor electrical connection
How to Fix the DTC P1B15 GMC?
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 P1B15 GMC 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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Frequently Asked Questions about P1B15 GMC Code
1. What does the OBDII code P1B15 mean on a GMC vehicle?
P1B15 indicates that the Regenerative Braking Torque Request Signal Message Counter is incorrect, meaning there is an issue with how the vehicle’s regenerative braking system is communicating torque requests.
2. What are the common symptoms of code P1B15 in a GMC?
Symptoms may include reduced regenerative braking functionality, decreased fuel efficiency in hybrid or electric vehicles, and the illumination of the Check Engine Light.
3. What causes the P1B15 code to appear on a GMC?
This code is typically caused by a communication error between the vehicle’s hybrid control module and braking system, a faulty regenerative braking module, or damaged wiring and connectors.
4. Can I still drive my GMC with a P1B15 code?
Yes, you can usually drive the vehicle, but regenerative braking may not function properly, which could impact fuel efficiency or braking performance.
5. How is the P1B15 code diagnosed?
A mechanic will use a scan tool to verify the code, inspect wiring and connectors for damage, and test the communication between the hybrid control module and regenerative braking system.
6. How do I fix a P1B15 code on a GMC?
Repairs may involve replacing or repairing damaged wiring, cleaning connectors, updating control module software, or replacing the regenerative braking module.
7. Can a software update fix the P1B15 code?
In some cases, updating the hybrid control module software can resolve communication issues causing the P1B15 code.
8. How much does it cost to fix the P1B15 code on a GMC?
Repair costs can vary but typically range between $150 and $500, depending on whether repairs involve wiring fixes or module replacement.
9. Does the P1B15 code affect braking performance?
It may reduce the effectiveness of regenerative braking, but the traditional braking system should still function normally.
10. Is the P1B15 code common in GMC vehicles?
This code is less common and usually specific to hybrid or electric GMC models equipped with regenerative braking systems.
Discuss the causes and fixes for P1B15 GMC OBDII Code
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