OBD Guide
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P1A29

Hybrid Battery 2 Circuit Low Voltage

P1A29 is an OBD-II diagnostic trouble code meaning: Hybrid Battery 2 Circuit Low Voltage. Common causes: hybrid battery low, damage or wear to battery cells. Estimated repair cost: $167–556.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$167–556 (est.)

Symptoms

  • Reduced vehicle power
  • Increased fuel consumption
  • Check Engine Light Illuminates
  • Problems charging the hybrid battery
  • The car goes into emergency mode

Causes

  • Hybrid battery low
  • Damage or wear to battery cells
  • Problems with connections or wiring harness
  • Malfunction of the hybrid system control module
  • Problems with the charging system

How to Fix

  1. Check the charge level of the hybrid battery
  2. Inspect connections and wiring harness for damage
  3. Test battery cells for wear
  4. Check the operation of the hybrid system control module
  5. Replace the hybrid battery if necessary

Related codes

P1A28P1A30P0A80

FAQ

What does the P1A29 code mean?

P1A29 is an OBD-II diagnostic trouble code that indicates: Hybrid Battery 2 Circuit Low Voltage

What causes a P1A29 error code?

The most common causes of P1A29 include: Hybrid battery low; Damage or wear to battery cells; Problems with connections or wiring harness; Malfunction of the hybrid system control module.

How do I fix a P1A29 diagnostic trouble code?

To fix P1A29: Check the charge level of the hybrid battery. Inspect connections and wiring harness for damage. Test battery cells for wear. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1A29?

Do not drive — repair immediately

How much does it cost to fix P1A29?

The estimated repair cost for P1A29 is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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