P1B42
Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance
P1B42 is an OBD-II diagnostic trouble code meaning: Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance. Common causes: damage to the insulation of high-voltage cables, engine control module 2 malfunction. Estimated repair cost: $167–556.
Symptoms
- Check Engine light comes on
- Hybrid system power reduction
- High Voltage Fault Warning
- The car may go into emergency mode
- Possible problems with battery charging
Causes
- Damage to the insulation of high-voltage cables
- Engine control module 2 malfunction
- Problems with high voltage battery
- Short circuit in high voltage circuit
- Corroded or damaged connectors
How to Fix
- Check the integrity of the insulation of high-voltage cables
- Diagnose engine control module 2
- Check the condition of the high-voltage battery
- Inspect connectors and connections for damage
- Repair only from an authorized dealer
Related codes
FAQ
What does the P1B42 code mean?
P1B42 is an OBD-II diagnostic trouble code that indicates: Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance
What causes a P1B42 error code?
The most common causes of P1B42 include: Damage to the insulation of high-voltage cables; Engine control module 2 malfunction; Problems with high voltage battery; Short circuit in high voltage circuit.
How do I fix a P1B42 diagnostic trouble code?
To fix P1B42: Check the integrity of the insulation of high-voltage cables. Diagnose engine control module 2. Check the condition of the high-voltage battery. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1B42?
Do not drive — repair immediately
How much does it cost to fix P1B42?
The estimated repair cost for P1B42 is $167–556. Actual cost depends on your vehicle, location, and labor rates.
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