OBD Guide
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P303C

Hybrid/EV Battery Interface Control Module 12 Read Only Memory

P303C is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Interface Control Module 12 Read Only Memory. Common causes: module software error, module memory corruption. 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 performance of the hybrid system
  • Power limitation
  • Battery charging problems
  • Error message on display

Causes

  • Module software error
  • Module memory corruption
  • Problems with module power supply
  • Contact corrosion
  • Mechanical damage to the module

How to Fix

  1. Carry out module diagnostics
  2. Update module software
  3. Check the integrity of wiring and contacts
  4. Replace the control module if necessary
  5. Repair only from an authorized dealer

Related codes

P303DP303EP303F

FAQ

What does the P303C code mean?

P303C is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Interface Control Module 12 Read Only Memory

What causes a P303C error code?

The most common causes of P303C include: Module software error; Module memory corruption; Problems with module power supply; Contact corrosion.

How do I fix a P303C diagnostic trouble code?

To fix P303C: Carry out module diagnostics. Update module software. Check the integrity of wiring and contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P303C?

Limited driving only, diagnose soon

How much does it cost to fix P303C?

The estimated repair cost for P303C is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat