OBD Guide
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B1470

Lamp Headlamp Input Circuit Failure

B1470 is an OBD-II diagnostic trouble code meaning: Lamp Headlamp Input Circuit Failure. Common causes: open or short circuit in wiring harness, faulty headlight relay. Estimated repair cost: $56–167.

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

Symptoms

  • Headlights don't work
  • Flashing headlights
  • Dashboard warning

Causes

  • Open or short circuit in wiring harness
  • Faulty headlight relay
  • Blown fuse
  • Problems with the headlight control unit
  • Contact corrosion

How to Fix

  1. Check fuses and replace if necessary
  2. Check headlight relay
  3. Inspect the wiring harness for damage
  4. Check contacts for corrosion
  5. Test the headlight control unit

Related codes

B1471B1472

FAQ

What does the B1470 code mean?

B1470 is an OBD-II diagnostic trouble code that indicates: Lamp Headlamp Input Circuit Failure

What causes a B1470 error code?

The most common causes of B1470 include: Open or short circuit in wiring harness; Faulty headlight relay; Blown fuse; Problems with the headlight control unit.

How do I fix a B1470 diagnostic trouble code?

To fix B1470: Check fuses and replace if necessary. Check headlight relay. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1470?

Limited driving only, diagnose soon

How much does it cost to fix B1470?

The estimated repair cost for B1470 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat