OBD Guide
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P1B45

Hybrid/Electric Vehicle Battery 33 Circuit Performance

P1B45 is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 33 Circuit Performance. Common causes: faulty battery cell no. 33, connection or wiring problems. Estimated repair cost: $56–278.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • Check Engine light comes on
  • Hybrid system power reduction
  • Reducing electric range
  • System transition to emergency mode
  • Unusual battery level readings

Causes

  • Faulty battery cell No. 33
  • Connection or wiring problems
  • Corrosion of contacts in the battery circuit
  • Battery management system (BMS) malfunction
  • Insulation damage or short circuit

How to Fix

  1. Check the condition of battery cell No. 33
  2. Inspect connections and wiring for damage
  3. Check element resistance and voltage
  4. Test the battery management system
  5. If necessary, replace the faulty element or components

Related codes

P1B44P1B46P0A7F

FAQ

What does the P1B45 code mean?

P1B45 is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 33 Circuit Performance

What causes a P1B45 error code?

The most common causes of P1B45 include: Faulty battery cell No. 33; Connection or wiring problems; Corrosion of contacts in the battery circuit; Battery management system (BMS) malfunction.

How do I fix a P1B45 diagnostic trouble code?

To fix P1B45: Check the condition of battery cell No. 33. Inspect connections and wiring for damage. Check element resistance and voltage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1B45?

Limited driving only, diagnose soon

How much does it cost to fix P1B45?

The estimated repair cost for P1B45 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat