OBD Guide
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B2464

Auxiliary Heater Start Time Exceeded

B2464 is an OBD-II diagnostic trouble code meaning: Auxiliary Heater Start Time Exceeded. Common causes: heater fuel pump malfunction, problems with wiring harness or fuses. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • The auxiliary heater does not turn on
  • Extended engine warm-up time
  • Increased fuel consumption in the cold season

Causes

  • Heater fuel pump malfunction
  • Problems with wiring harness or fuses
  • Heater glow plug malfunction
  • Dirty or clogged heater fuel injectors
  • Problems with the heater control module

How to Fix

  1. Check fuses and relays associated with the heater
  2. Diagnose the wiring harness for breaks and short circuits
  3. Check the glow plug and heater fuel pump
  4. Clean or replace heater fuel injectors
  5. Check the heater control module

Related codes

B2462B2463P0380

FAQ

What does the B2464 code mean?

B2464 is an OBD-II diagnostic trouble code that indicates: Auxiliary Heater Start Time Exceeded

What causes a B2464 error code?

The most common causes of B2464 include: Heater fuel pump malfunction; Problems with wiring harness or fuses; Heater glow plug malfunction; Dirty or clogged heater fuel injectors.

How do I fix a B2464 diagnostic trouble code?

To fix B2464: Check fuses and relays associated with the heater. Diagnose the wiring harness for breaks and short circuits. Check the glow plug and heater fuel pump. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2464?

Limited driving only, diagnose soon

How much does it cost to fix B2464?

The estimated repair cost for B2464 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat