P1B44
Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 High Voltage
P1B44 is an OBD-II diagnostic trouble code meaning: Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 High Voltage. Common causes: damage to the insulation of high-voltage cables, motor control module 2 malfunction. Estimated repair cost: $167–556.
Symptoms
- Check Engine light comes on
- Reduced motor power
- High voltage system fault warning
- The car may go into emergency mode
- Possible problems with charging the high-voltage battery
Causes
- Damage to the insulation of high-voltage cables
- Motor control module 2 malfunction
- Problems in the insulation monitoring circuit
- Corroded or damaged contacts
- Damage to the high voltage system wiring harness
How to Fix
- Carry out diagnostics of the high-voltage system
- Check the integrity of the insulation of high-voltage cables
- Check the condition of the motor control module 2
- Check the insulation monitoring circuit for opens and shorts
- Repair only from an authorized dealer
Related codes
FAQ
What does the P1B44 code mean?
P1B44 is an OBD-II diagnostic trouble code that indicates: Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 High Voltage
What causes a P1B44 error code?
The most common causes of P1B44 include: Damage to the insulation of high-voltage cables; Motor control module 2 malfunction; Problems in the insulation monitoring circuit; Corroded or damaged contacts.
How do I fix a P1B44 diagnostic trouble code?
To fix P1B44: Carry out diagnostics of the high-voltage system. Check the integrity of the insulation of high-voltage cables. Check the condition of the motor control module 2. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1B44?
Do not drive — repair immediately
How much does it cost to fix P1B44?
The estimated repair cost for P1B44 is $167–556. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat