OBD Guide
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P1FAF

Hybrid/EV Battery Interface Control Module 9 Read Only Memory Performance

P1FAF is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Interface Control Module 9 Read Only Memory Performance. Common causes: control module software failure, damage to the rom chip. Estimated repair cost: $167–556.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$167–556 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced vehicle power
  • Switching to emergency mode
  • Speed limit
  • Error message on display

Causes

  • Control module software failure
  • Damage to the ROM chip
  • Module power problems
  • Corroded or damaged connectors
  • Mechanical damage to the module

How to Fix

  1. System diagnostics using a specialized scanner
  2. Checking the integrity of the wiring harness and connectors
  3. Module software update
  4. Replacing the Battery Interface Control Module
  5. Repair only from an authorized dealer

Related codes

P1FAEP1FB0P0A80

FAQ

What does the P1FAF code mean?

P1FAF is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Interface Control Module 9 Read Only Memory Performance

What causes a P1FAF error code?

The most common causes of P1FAF include: Control module software failure; Damage to the ROM chip; Module power problems; Corroded or damaged connectors.

How do I fix a P1FAF diagnostic trouble code?

To fix P1FAF: System diagnostics using a specialized scanner. Checking the integrity of the wiring harness and connectors. Module software update. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1FAF?

Limited driving only, diagnose soon

How much does it cost to fix P1FAF?

The estimated repair cost for P1FAF is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat