OBD Guide
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P1049

Reductant Injector High Control Circuit High Voltage

P1049 is an OBD-II diagnostic trouble code meaning: Reductant Injector High Control Circuit High Voltage. Common causes: reagent injector malfunction, open or short circuit in control circuit. Estimated repair cost: $56–278.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • Check Engine Light Is On
  • Reduced engine power
  • Increased fuel consumption
  • SCR system error message on dashboard
  • Increased NOx emissions

Causes

  • Reagent injector malfunction
  • Open or short circuit in control circuit
  • Problems with the injector wiring harness
  • SCR control module malfunction
  • Corrosion or poor contact in connectors

How to Fix

  1. Check the integrity of the injector control circuit
  2. Check the resistance of the reagent injector
  3. Inspect the wiring harness and connectors for damage.
  4. Check the operation of the SCR control module
  5. If necessary, replace the reagent injector

Related codes

P1048P1050P20EE

FAQ

What does the P1049 code mean?

P1049 is an OBD-II diagnostic trouble code that indicates: Reductant Injector High Control Circuit High Voltage

What causes a P1049 error code?

The most common causes of P1049 include: Reagent injector malfunction; Open or short circuit in control circuit; Problems with the injector wiring harness; SCR control module malfunction.

How do I fix a P1049 diagnostic trouble code?

To fix P1049: Check the integrity of the injector control circuit. Check the resistance of the reagent injector. Inspect the wiring harness and connectors for damage.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1049?

Yes, but get it checked soon

How much does it cost to fix P1049?

The estimated repair cost for P1049 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat