OBD Guide
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P1B54

Hybrid/Electric Vehicle Battery 38 Circuit Performance

P1B54 is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 38 Circuit Performance. Common causes: degradation of battery cell no. 38, cell balancer problems. Estimated repair cost: $56–278.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • Reduced motor power
  • Reducing electric range
  • Check Engine Light Is On
  • Possible problems with charging the high-voltage battery
  • The car may go into emergency mode

Causes

  • Degradation of battery cell No. 38
  • Cell balancer problems
  • Open or short circuit in the measuring circuit
  • Contact corrosion on connectors
  • Battery control unit malfunction

How to Fix

  1. Diagnosis of high-voltage battery condition
  2. Checking the parameters of cell No. 38 with a scanner
  3. Cell Control Circuit Testing
  4. Cell replacement or circuit repair if necessary
  5. After repair - flashing the battery control unit

Related codes

P1B55P1B56P1B53

FAQ

What does the P1B54 code mean?

P1B54 is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 38 Circuit Performance

What causes a P1B54 error code?

The most common causes of P1B54 include: Degradation of battery cell No. 38; Cell balancer problems; Open or short circuit in the measuring circuit; Contact corrosion on connectors.

How do I fix a P1B54 diagnostic trouble code?

To fix P1B54: Diagnosis of high-voltage battery condition. Checking the parameters of cell No. 38 with a scanner. Cell Control Circuit Testing. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1B54?

Yes, but get it checked soon

How much does it cost to fix P1B54?

The estimated repair cost for P1B54 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat