OBD Guide
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P3149

Cylinder 1 High-Pressure Fuel Injector High Side Circuit Low

P3149 is an OBD-II diagnostic trouble code meaning: Cylinder 1 High-Pressure Fuel Injector High Side Circuit Low. Common causes: cylinder 1 injector malfunction, open or short circuit in wiring harness. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Unstable engine operation
  • Power reduction
  • Increased fuel consumption
  • Misfire in cylinder 1
  • Check Engine Light Is On

Causes

  • Cylinder 1 injector malfunction
  • Open or short circuit in wiring harness
  • Poor contact in the injector connectors
  • Engine control unit malfunction
  • Problems with the injector relay or fuse

How to Fix

  1. Check the condition of the cylinder 1 injector
  2. Inspect the wiring harness and connectors for damage.
  3. Check the voltage in the injector circuit
  4. Test injector resistance
  5. If necessary, replace the injector or repair the wiring

Related codes

P3146P3147P3148

FAQ

What does the P3149 code mean?

P3149 is an OBD-II diagnostic trouble code that indicates: Cylinder 1 High-Pressure Fuel Injector High Side Circuit Low

What causes a P3149 error code?

The most common causes of P3149 include: Cylinder 1 injector malfunction; Open or short circuit in wiring harness; Poor contact in the injector connectors; Engine control unit malfunction.

How do I fix a P3149 diagnostic trouble code?

To fix P3149: Check the condition of the cylinder 1 injector. Inspect the wiring harness and connectors for damage.. Check the voltage in the injector circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P3149?

Limited driving only, diagnose soon

How much does it cost to fix P3149?

The estimated repair cost for P3149 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat