P1B55
Hybrid/Electric Vehicle Battery 38 Circuit Low Voltage
P1B55 is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 38 Circuit Low Voltage. Common causes: problems with battery cell in circuit 38, damaged or corroded battery connectors. Estimated repair cost: $167–889.
Symptoms
- The Check Engine or Hybrid light comes on
- Reduced power or efficiency of the hybrid system
- The car goes into emergency mode
- Increased fuel consumption (for hybrids)
- Error message on the instrument panel display
Causes
- Problems with battery cell in circuit 38
- Damaged or corroded battery connectors
- Faulty battery voltage sensors
- Problems with wiring harness to circuit 38
- Battery management module (BMS) malfunction
How to Fix
- Diagnosis of high-voltage battery condition
- Checking voltage and resistance in the circuit 38
- Inspect connectors and wiring harness for damage
- Testing and possible replacement of faulty battery cells
- Updating or flashing the Battery Management Module (BMS)
Related codes
FAQ
What does the P1B55 code mean?
P1B55 is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 38 Circuit Low Voltage
What causes a P1B55 error code?
The most common causes of P1B55 include: Problems with battery cell in circuit 38; Damaged or corroded battery connectors; Faulty battery voltage sensors; Problems with wiring harness to circuit 38.
How do I fix a P1B55 diagnostic trouble code?
To fix P1B55: Diagnosis of high-voltage battery condition. Checking voltage and resistance in the circuit 38. Inspect connectors and wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1B55?
Limited driving only, diagnose soon
How much does it cost to fix P1B55?
The estimated repair cost for P1B55 is $167–889. Actual cost depends on your vehicle, location, and labor rates.
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