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Home / DTC / P2319 — Ignition Coil G Primary Control Circuit High

P2319 — Ignition Coil G Primary Control Circuit High

Detailed page for trouble code P2319.

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22,491specific
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Code

P2319

Generic P — Powertrain

Ignition Coil G Primary Control Circuit High

Brand: Generic
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Short to battery (B+) on the coil G primary/control wire
  • Failed ignition coil (internal short or open)
  • Open or high-resistance connection between PCM and coil (broken wire, corrosion, damaged connector)
  • Faulty PCM / ignition driver transistor stuck open
  • Poor ground or body/chassis ground issue affecting coil circuit
  • Aftermarket or incorrect replacement coil or connector

Symptoms

  • Malfunction Indicator Lamp (MIL) / Check Engine Light on
  • Misfire on the cylinder served by Coil G or rough idle
  • Reduced power, hesitation, or poor acceleration
  • Possible no-start condition if coil fails completely
  • Misfire-related fuel trim or emissions faults

What to check

  • Scan for freeze frame and live data: note RPM, battery voltage, misfire counters and whether code is confirmed
  • Compare live primary control signals (if available) for coil G vs other coils
  • Visual inspection of coil G harness, connector, and pin condition for corrosion, damage, or pushed-out pins
  • Check battery voltage and charging system before testing ignition circuits
  • Backprobe coil G connector and measure voltage on control and supply pins during key ON and cranking
  • Measure coil G primary resistance with the coil removed and compare to spec

Signal parameters

  • Ignition coil primary supply voltage (key ON, engine off): approximately battery voltage (~11.5–14.5 V)
  • Control (driver) circuit when firing: pulses pulled toward ground (close to 0 V) by PCM; during dwell it will be low, then released to allow collapse voltage
  • Control circuit when inactive: may sit near battery voltage (open-drain drivers) or near 0 V depending on design; consult vehicle-specific data
  • Typical coil primary resistance: often 0.2–3 ohms (varies widely by coil design) — check OEM spec
  • Dwell/pulse widths vary with RPM and load (milliseconds range); waveform should show switching edges on oscilloscope

Diagnostic algorithm

  1. Retrieve freeze frame and live data. Confirm code P2319 and note conditions (engine temp, RPM, battery voltage, misfire counts).
  2. Perform visual inspection of coil G connector, wiring, and harness for damage, burns, corrosion, or pin push-out. Repair any obvious damage.
  3. Check battery/charging system voltage. Low or unstable battery can affect ignition control readings.
  4. Backprobe coil G connector: measure voltage at supply and control pins with key ON and while cranking. Expected: supply ≈ battery voltage; control should show switching (pulses to near 0 V) during firing. If control is stuck at B+ or not switching, note that.
  5. Check for short to B+: with ignition OFF, use a multimeter to check for continuity between the control wire and battery positive. No direct short should be present.
  6. Measure coil primary resistance (with coil removed). If out of specification, replace the coil.
  7. Swap coil G with a known-good, identical coil (if coils are interchangeable) and clear codes. If code follows coil, replace coil. If it remains on original circuit, suspect wiring or PCM.
  8. Inspect and test continuity between coil control pin and PCM driver pin. Repair any opens or shorts found.
  9. If wiring and coil check good, use an oscilloscope to examine the coil primary waveform for proper dwell and collapse. Abnormal waveform may indicate PCM driver failure.
  10. If all wiring and components test good and the issue persists, consider PCM diagnostic/repair or replacement following manufacturer procedures.
  11. Safety note: When working near ignition components, take precautions—engine may crank, and ignition circuits can produce high voltages. Disconnect battery when repairing wiring.

Likely causes

  • Damaged harness or connector causing the control wire to be tied to B+
  • Faulty ignition coil G with internal short or incorrect internal resistance
  • Corroded or bent pins at coil or PCM connector creating intermittent/high resistance
  • PCM driver failed (less common than wiring or coil faults)

Fault status

⚠️ Status
PCM detected high voltage on Ignition Coil G primary control circuit (control signal higher than expected). Possible short to battery, wiring fault, bad coil, or PCM driver failure.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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Code

P2319

LAND ROVER P — Powertrain

Primary control of ignition coil G - high circuit

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Short to battery (B+) on the coil G primary/control wire
  • Failed ignition coil (internal short or open)
  • Open or high-resistance connection between PCM and coil (broken wire, corrosion, damaged connector)
  • Faulty PCM / ignition driver transistor stuck open
  • Poor ground or body/chassis ground issue affecting coil circuit
  • Aftermarket or incorrect replacement coil or connector

Symptoms

  • Malfunction Indicator Lamp (MIL) / Check Engine Light on
  • Misfire on the cylinder served by Coil G or rough idle
  • Reduced power, hesitation, or poor acceleration
  • Possible no-start condition if coil fails completely
  • Misfire-related fuel trim or emissions faults

What to check

  • Scan for freeze frame and live data: note RPM, battery voltage, misfire counters and whether code is confirmed
  • Compare live primary control signals (if available) for coil G vs other coils
  • Visual inspection of coil G harness, connector, and pin condition for corrosion, damage, or pushed-out pins
  • Check battery voltage and charging system before testing ignition circuits
  • Backprobe coil G connector and measure voltage on control and supply pins during key ON and cranking
  • Measure coil G primary resistance with the coil removed and compare to spec

Signal parameters

  • Ignition coil primary supply voltage (key ON, engine off): approximately battery voltage (~11.5–14.5 V)
  • Control (driver) circuit when firing: pulses pulled toward ground (close to 0 V) by PCM; during dwell it will be low, then released to allow collapse voltage
  • Control circuit when inactive: may sit near battery voltage (open-drain drivers) or near 0 V depending on design; consult vehicle-specific data
  • Typical coil primary resistance: often 0.2–3 ohms (varies widely by coil design) — check OEM spec
  • Dwell/pulse widths vary with RPM and load (milliseconds range); waveform should show switching edges on oscilloscope

Diagnostic algorithm

  1. Retrieve freeze frame and live data. Confirm code P2319 and note conditions (engine temp, RPM, battery voltage, misfire counts).
  2. Perform visual inspection of coil G connector, wiring, and harness for damage, burns, corrosion, or pin push-out. Repair any obvious damage.
  3. Check battery/charging system voltage. Low or unstable battery can affect ignition control readings.
  4. Backprobe coil G connector: measure voltage at supply and control pins with key ON and while cranking. Expected: supply ≈ battery voltage; control should show switching (pulses to near 0 V) during firing. If control is stuck at B+ or not switching, note that.
  5. Check for short to B+: with ignition OFF, use a multimeter to check for continuity between the control wire and battery positive. No direct short should be present.
  6. Measure coil primary resistance (with coil removed). If out of specification, replace the coil.
  7. Swap coil G with a known-good, identical coil (if coils are interchangeable) and clear codes. If code follows coil, replace coil. If it remains on original circuit, suspect wiring or PCM.
  8. Inspect and test continuity between coil control pin and PCM driver pin. Repair any opens or shorts found.
  9. If wiring and coil check good, use an oscilloscope to examine the coil primary waveform for proper dwell and collapse. Abnormal waveform may indicate PCM driver failure.
  10. If all wiring and components test good and the issue persists, consider PCM diagnostic/repair or replacement following manufacturer procedures.
  11. Safety note: When working near ignition components, take precautions—engine may crank, and ignition circuits can produce high voltages. Disconnect battery when repairing wiring.

Likely causes

  • Damaged harness or connector causing the control wire to be tied to B+
  • Faulty ignition coil G with internal short or incorrect internal resistance
  • Corroded or bent pins at coil or PCM connector creating intermittent/high resistance
  • PCM driver failed (less common than wiring or coil faults)

Fault status

⚠️ Status
PCM detected high voltage on Ignition Coil G primary control circuit (control signal higher than expected). Possible short to battery, wiring fault, bad coil, or PCM driver failure.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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P2318 P2320 P0357 P0350 P0307
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