OBD Guide
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P1FA9

Hybrid/EV Battery Interface Control Module 8 Not Programmed

P1FA9 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Interface Control Module 8 Not Programmed. Common causes: lack of programming of a new module, software update fails. Estimated repair cost: $167–444.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$167–444 (est.)

Symptoms

  • Check Engine Light Illuminated
  • Hybrid system power reduction
  • Battery charging problems
  • Incorrect charge level display
  • Limitation of operation in electric mode

Causes

  • Lack of programming of a new module
  • Software update fails
  • Problems in the module communication circuit
  • Incompatible software version
  • Errors when flashing the controller

How to Fix

  1. System diagnostics using an OEM scanner
  2. Checking the module software version
  3. Module programming/reprogramming
  4. Checking the integrity of the wiring harness
  5. Updating the software to the latest version

Related codes

P1FA8P1FAAP0AA1

FAQ

What does the P1FA9 code mean?

P1FA9 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Interface Control Module 8 Not Programmed

What causes a P1FA9 error code?

The most common causes of P1FA9 include: Lack of programming of a new module; Software update fails; Problems in the module communication circuit; Incompatible software version.

How do I fix a P1FA9 diagnostic trouble code?

To fix P1FA9: System diagnostics using an OEM scanner. Checking the module software version. Module programming/reprogramming. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1FA9?

Limited driving only, diagnose soon

How much does it cost to fix P1FA9?

The estimated repair cost for P1FA9 is $167–444. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat