P0361 medium Severity

P0361: Ignition Coil K Primary/Secondary Circuit Malfunction

Possible engine misfire and rough running; check engine light illuminated

Overview

P0361 refers to a fault in the primary/secondary circuit of ignition coil 'K', indicating an open or short in the coil driver circuit that can cause misfires and degraded engine performance.

Common Symptoms

  • Check engine light (MIL) illuminated
  • Engine misfire or rough idle
  • Loss of power under acceleration
  • Intermittent stalling

Most Common Causes

Faulty ignition coil 'K' high

Open or short in primary/secondary coil winding or internal failure

Damaged wiring or connectors in coil circuit high

Broken, shorted or corroded wires/connectors leading to coil driver

Faulty powertrain control module (PCM) coil driver medium

PCM driver transistor or MOSFET failure; verify after wiring and coil checks

Poor grounding or power supply issue medium

Voltage supply problems affecting coil operation

Diagnostic Steps

  1. Retrieve DTC with OBD-II scanner and confirm P0361
    Expected: Code P0361 present
    Interpretation: Verifies the fault is currently stored
  2. Perform visual inspection of ignition coil, wiring, and connectors
    Expected: No broken wires, corrosion, or loose connectors
    Interpretation: Identifies obvious wiring or connector issues
  3. Test for proper driver signal at coil using a multimeter (AC Hertz or scope)
    Expected: Driver signal present (approx 5–20 Hz) if PCM is commanding
    Interpretation: If signal present, coil likely faulty; if absent, check wiring/PCM
  4. Measure DC voltage and continuity in coil driver circuit with connector disconnected
    Expected: Correct voltage levels and continuity between PCM and coil driver circuit
    Interpretation: Confirms wiring integrity; open or short indicates wiring repair
  5. Replace suspected faulty ignition coil and clear codes
    Expected: Code does not return after test drive
    Interpretation: Confirms resolution if code no longer appears

Repair Solutions

Replace faulty ignition coil 'K' medium
Estimated Cost: $80 - $300

Cost depends on vehicle and part choice

Repair or replace damaged wiring/connectors medium
Estimated Cost: $50 - $200

Labor intensive if harness repair needed

Replace or reprogram PCM if coil driver defective hard
Estimated Cost: $400 - $1200

High cost; confirm no wiring/coil issues first

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Mislabeling P0361 as a camshaft position sensor fault due to generic code misinterpretation

Frequently Asked Questions

What does a P0361 diagnostic trouble code signify?

Technically, the P0361 code represents Ignition Coil K Primary/Secondary Circuit Malfunction. It usually points to a fault within the Ignition.

Should I stop driving if I have P0361?

This is a medium priority issue. Possible engine misfire and rough running; check engine light illuminated

What are the symptoms of P0361?

You may experience the following: Check engine light (MIL) illuminated, Engine misfire or rough idle, Loss of power under acceleration.

What causes the P0361 code?

Potential culprits include: Faulty ignition coil 'K', Damaged wiring or connectors in coil circuit, Faulty powertrain control module (PCM) coil driver. A proper diagnosis is recommended.

Is P0361 expensive to fix?

Expect to pay around $200 if the issue is a Repair or replace damaged wiring/connectors, but up to $1200 if the Replace or reprogram PCM if coil driver defective needs replacement.

Does code P0361 apply to BMW vehicles?

P0361 is not specific to any one brand. It can appear on Ford, Dodge, Toyota, Honda, Jeep, and other vehicles.

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