P1B42 GMC Code - Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance
Quick Answer
The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid/EV powertrain control module 1. Common causes include Faulty Hybrid/Electric Vehicle Battery Pack. 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
- P1B42 GMC indicates Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance.
- Common causes
- Common causes include Faulty Hybrid/Electric Vehicle Battery Pack.
- 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 P1B42 GMC Description
The motor control modules test for isolation between each high voltage bus and vehicle chassis whenever high voltage is present at the power inverter module.
What are the Possible Causes of the DTC P1B42 GMC?
- Faulty Hybrid/Electric Vehicle Battery Pack
How to Fix the DTC P1B42 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 P1B42 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 P1B42 GMC Code
1. What are common symptoms of OBDII code P1B42 in a GMC vehicle?
- Common symptoms include poor hybrid/EV battery performance, decreased fuel efficiency, and potential drivability issues.
2. What does the OBDII code P1B42 indicate in a GMC vehicle?
- This code specifically points to an issue with the Drive Motor 2 Control Module's Hybrid/EV Battery Voltage Isolation Sensing performance.
3. What are possible causes of OBDII code P1B42 in a GMC vehicle?
- Possible causes include a faulty drive motor control module, issues with battery voltage isolation sensing components, wiring problems, or a malfunctioning hybrid/EV battery.
4. How can I diagnose the root cause of OBDII code P1B42 in my GMC vehicle?
- To diagnose this code, it is recommended to perform a thorough inspection of the drive motor control module, battery isolation sensing components, and associated wiring. Testing these components with a diagnostic tool can help pinpoint the issue.
5. Can I still drive my GMC vehicle with OBDII code P1B42 present?
- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid/EV system. It is best to address the issue promptly.
6. What are some repair tips for fixing OBDII code P1B42 in a GMC vehicle?
- Repair tips may include checking and repairing any damaged wiring, replacing the drive motor control module if necessary, and ensuring proper functioning of the hybrid/EV battery components.
7. Is it safe to reset the OBDII code P1B42 in my GMC vehicle without addressing the underlying issue?
- It is not recommended to simply reset the code without fixing the root cause, as the issue will likely recur and potentially worsen over time.
8. How much can I expect to pay to repair OBDII code P1B42 in a GMC vehicle?
- Repair costs can vary depending on the specific cause of the code and the extent of the repairs needed. It is advisable to consult with a professional mechanic for an accurate estimate.
9. Are there any recalls or technical service bulletins related to OBDII code P1B42 in GMC vehicles?
- It is advisable to check with a GMC dealership or visit the National Highway Traffic Safety Administration (NHTSA) website for any relevant recalls or technical service bulletins related to this code.
10. Can OBDII code P1B42 in a GMC vehicle be fixed without professional help?
- While some basic troubleshooting can be done by the vehicle owner, addressing OBDII code P1B42 often requires specialized knowledge and tools, so it is recommended to seek professional help for proper diagnosis and repair.
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