P1B43
Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 Low Voltage
P1B43 is an OBD-II diagnostic trouble code meaning: Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 Low Voltage. Common causes: insulation monitoring sensor fault, damage to the wiring in the control circuit. Estimated repair cost: $167–556.
Symptoms
- Check Engine light comes on
- Reduced power or hybrid system failure
- Warning messages on the dashboard
- The car may go into emergency mode
- Possible problems with battery charging
Causes
- Insulation monitoring sensor fault
- Damage to the wiring in the control circuit
- Short circuit in high voltage system
- Problems with the hybrid system control module
- Leakage current in a high voltage system
How to Fix
- Carry out diagnostics of the high-voltage system
- Check the integrity of the insulation monitoring circuit
- Test insulation monitoring sensors
- Check the status of the control module
- Repair only from an authorized dealer
Related codes
FAQ
What does the P1B43 code mean?
P1B43 is an OBD-II diagnostic trouble code that indicates: Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 Low Voltage
What causes a P1B43 error code?
The most common causes of P1B43 include: Insulation monitoring sensor fault; Damage to the wiring in the control circuit; Short circuit in high voltage system; Problems with the hybrid system control module.
How do I fix a P1B43 diagnostic trouble code?
To fix P1B43: Carry out diagnostics of the high-voltage system. Check the integrity of the insulation monitoring circuit. Test insulation monitoring sensors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1B43?
Do not drive — repair immediately
How much does it cost to fix P1B43?
The estimated repair cost for P1B43 is $167–556. Actual cost depends on your vehicle, location, and labor rates.
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