P1B0B
Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 Low Voltage
P1B0B is an OBD-II diagnostic trouble code meaning: Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 Low Voltage. Common causes: damage to the insulation monitoring circuit wiring harness, insulation monitoring sensor fault. Estimated repair cost: $56–278.
Symptoms
- Check Engine light comes on
- Hybrid system power reduction
- Warning messages on the dashboard
- Limiting the operation of the electric motor
- Problems with charging a high-voltage battery
Causes
- Damage to the insulation monitoring circuit wiring harness
- Insulation monitoring sensor fault
- Problems with the hybrid system control module
- Short circuit in high voltage system
- Poor contact in the control system connectors
How to Fix
- Check the integrity of the control circuit wiring harness
- Test the insulation monitoring sensor
- Check system connections and connectors
- Diagnose the hybrid system control module
- Check the high voltage system for short circuits
Related codes
FAQ
What does the P1B0B code mean?
P1B0B is an OBD-II diagnostic trouble code that indicates: Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 Low Voltage
What causes a P1B0B error code?
The most common causes of P1B0B include: Damage to the insulation monitoring circuit wiring harness; Insulation monitoring sensor fault; Problems with the hybrid system control module; Short circuit in high voltage system.
How do I fix a P1B0B diagnostic trouble code?
To fix P1B0B: Check the integrity of the control circuit wiring harness. Test the insulation monitoring sensor. Check system connections and connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1B0B?
Do not drive — repair immediately
How much does it cost to fix P1B0B?
The estimated repair cost for P1B0B is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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