OBD Guide
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P1FB9

Hybrid/EV Battery Interface Control Module 7 Long Term Memory Performance

P1FB9 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Interface Control Module 7 Long Term Memory Performance. Common causes: control module software error, controller memory corruption. Estimated repair cost: $167–556.

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

Symptoms

  • Hybrid system power reduction
  • Reducing electric range
  • Check Engine Light Illuminates
  • Incorrect display of battery charge level
  • Reduced efficiency of regenerative braking

Causes

  • Control module software error
  • Controller memory corruption
  • Module power problems
  • Corroded or damaged connectors
  • Age-related wear and tear on battery components

How to Fix

  1. Diagnostics of the control module using a scanner
  2. Checking the integrity of the wiring harness and connectors
  3. Module software update
  4. Checking the module supply voltage
  5. Replacing the control module if necessary

Related codes

P1FBAP1FBBP0AA6

FAQ

What does the P1FB9 code mean?

P1FB9 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Interface Control Module 7 Long Term Memory Performance

What causes a P1FB9 error code?

The most common causes of P1FB9 include: Control module software error; Controller memory corruption; Module power problems; Corroded or damaged connectors.

How do I fix a P1FB9 diagnostic trouble code?

To fix P1FB9: Diagnostics of the control module using a 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 P1FB9?

Limited driving only, diagnose soon

How much does it cost to fix P1FB9?

The estimated repair cost for P1FB9 is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat