OBD Guide
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P3155

Cylinder 3 High-Pressure Fuel Injector High Side Circuit Low

P3155 is an OBD-II diagnostic trouble code meaning: Cylinder 3 High-Pressure Fuel Injector High Side Circuit Low. Common causes: short circuit in the injector circuit, fuel injector malfunction. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Uneven engine operation
  • Misfire in cylinder 3
  • Increased fuel consumption
  • Check Engine Light Is On
  • Reduced engine power

Causes

  • Short circuit in the injector circuit
  • Fuel injector malfunction
  • Wiring harness damage
  • Problems with the engine control unit (ECU)
  • Poor contact in the injector connectors

How to Fix

  1. Check the resistance of the injector of cylinder 3
  2. Inspect the wiring harness and connectors for damage.
  3. Check injector circuit for short circuit
  4. Replace the faulty injector if necessary
  5. Check the operation of the engine control unit

Related codes

P3156P3154P0203

FAQ

What does the P3155 code mean?

P3155 is an OBD-II diagnostic trouble code that indicates: Cylinder 3 High-Pressure Fuel Injector High Side Circuit Low

What causes a P3155 error code?

The most common causes of P3155 include: Short circuit in the injector circuit; Fuel injector malfunction; Wiring harness damage; Problems with the engine control unit (ECU).

How do I fix a P3155 diagnostic trouble code?

To fix P3155: Check the resistance of the injector of cylinder 3. Inspect the wiring harness and connectors for damage.. Check injector circuit for short circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P3155?

Yes, but get it checked soon

How much does it cost to fix P3155?

The estimated repair cost for P3155 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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