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Home / DTC / P0355 — Ignition Coil E Primary Control Circuit/Open

P0355 — Ignition Coil E Primary Control Circuit/Open

Detailed page for trouble code P0355.

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22,491specific
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Code

P0355

Generic P — Powertrain

Ignition Coil E Primary Control Circuit/Open

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

Causes

  • Open or shorted primary wiring (connector, broken conductor, pin damage)
  • Corroded or loose coil connector or terminals
  • Failed ignition coil (primary winding or integrated driver)
  • Faulty ECM/PCM ignition driver transistor
  • Blown fuse or failed ignition/coil power supply/relay
  • Intermittent contact due to heat/vibration

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Misfire or rough running on the cylinder served by coil E
  • Reduced engine performance, hesitation, or stumble
  • Possible poor fuel economy
  • Hard starting or no start in severe cases

What to check

  • Retrieve freeze frame data and pending/confirmed codes; identify which cylinder is coil E on this vehicle
  • Visual inspection of coil E, connector, wiring harness and pins for damage or corrosion
  • Check related fuses and ignition power/relay circuits
  • Measure coil primary resistance (compare to spec or another coil)
  • Back-probe coil connector while cranking to verify supply and switching signal
  • Swap coil E with a known good coil from another cylinder to see if code follows the coil

Signal parameters

  • Primary supply voltage: ~12 V (battery) on the Vbat/power pin when ignition ON
  • Primary control pin: pulsed ground or switched positive from PCM during cranking/run (0 V to ~12 V depending on design)
  • Primary coil resistance (typical): approximately 0.2 - 3.0 ohms (varies by coil type; compare to spec)
  • Primary current pulse during dwell: several amps (varies by design)
  • Dwell time and pulse frequency vary with engine speed and load; waveform should show regular pulses when engine is cranking/running

Diagnostic algorithm

  1. Safety: park vehicle, key off, wear eye protection. Disconnect battery only if specified by manufacturer before connector work.
  2. Scan: read and record all DTCs and freeze frame data. Note if P0355 is confirmed or pending and any misfire codes (eg. P0305).
  3. Visual: inspect coil E, connector, wiring harness routing for chafing, heat damage, melted insulation, corrosion or bent pins.
  4. Power check: with key ON, verify battery voltage is present at the coil power terminal (if coil requires constant 12 V). Check fuse/relay for coil power.
  5. Resistance test: disconnect coil and measure primary winding resistance; compare to specification or another known-good coil of same type. An open or far-out-of-spec reading indicates a bad coil.
  6. Signal test while cranking/running: reconnect and back-probe the coil control terminal. Verify switching pulses from PCM (using DVOM for basic test or oscilloscope for waveform). No switching indicates open circuit or PCM driver issue.
  7. Swap test: swap coil E with another cylinder's coil. If the code/misfire follows the coil, replace the coil. If it stays on the same cylinder, suspect wiring or PCM.
  8. Wiring continuity: with ignition off, check continuity between coil control pin and the PCM driver pin; check for shorts to ground or battery. Repair any wiring faults.
  9. PCM check: if wiring and coil are good but no control signal, follow manufacturer procedures to test PCM driver before replacing ECM (some PCM repairs require bench testing or module replacement).
  10. Clear codes and road test: after repair, clear codes, confirm no return of P0355 and no misfire. Re-scan to ensure no additional faults.

Likely causes

  • Damaged or disconnected coil connector for coil E
  • Broken wire or poor continuity between coil connector and PCM
  • Failed ignition coil (internal open primary)
  • Corroded or bent pins causing high resistance
  • ECM/PCM driver failure (less common) or software fault

Fault status

⚠️ Status
DTC P0355 — Ignition Coil E Primary Control Circuit/Open. ECM detected an open or fault in the primary/control circuit for coil E. MIL may be illuminated and associated cylinder misfire recorded.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours

Similar codes

P0350 P0351 P0352 P0353 P0354 P0356
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Code

P0355

GWM P — Powertrain

- Malfunction in primary / secondary circuit of ignition coil E

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

Causes

  • Open or shorted primary wiring (connector, broken conductor, pin damage)
  • Corroded or loose coil connector or terminals
  • Failed ignition coil (primary winding or integrated driver)
  • Faulty ECM/PCM ignition driver transistor
  • Blown fuse or failed ignition/coil power supply/relay
  • Intermittent contact due to heat/vibration

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Misfire or rough running on the cylinder served by coil E
  • Reduced engine performance, hesitation, or stumble
  • Possible poor fuel economy
  • Hard starting or no start in severe cases

What to check

  • Retrieve freeze frame data and pending/confirmed codes; identify which cylinder is coil E on this vehicle
  • Visual inspection of coil E, connector, wiring harness and pins for damage or corrosion
  • Check related fuses and ignition power/relay circuits
  • Measure coil primary resistance (compare to spec or another coil)
  • Back-probe coil connector while cranking to verify supply and switching signal
  • Swap coil E with a known good coil from another cylinder to see if code follows the coil

Signal parameters

  • Primary supply voltage: ~12 V (battery) on the Vbat/power pin when ignition ON
  • Primary control pin: pulsed ground or switched positive from PCM during cranking/run (0 V to ~12 V depending on design)
  • Primary coil resistance (typical): approximately 0.2 - 3.0 ohms (varies by coil type; compare to spec)
  • Primary current pulse during dwell: several amps (varies by design)
  • Dwell time and pulse frequency vary with engine speed and load; waveform should show regular pulses when engine is cranking/running

Diagnostic algorithm

  1. Safety: park vehicle, key off, wear eye protection. Disconnect battery only if specified by manufacturer before connector work.
  2. Scan: read and record all DTCs and freeze frame data. Note if P0355 is confirmed or pending and any misfire codes (eg. P0305).
  3. Visual: inspect coil E, connector, wiring harness routing for chafing, heat damage, melted insulation, corrosion or bent pins.
  4. Power check: with key ON, verify battery voltage is present at the coil power terminal (if coil requires constant 12 V). Check fuse/relay for coil power.
  5. Resistance test: disconnect coil and measure primary winding resistance; compare to specification or another known-good coil of same type. An open or far-out-of-spec reading indicates a bad coil.
  6. Signal test while cranking/running: reconnect and back-probe the coil control terminal. Verify switching pulses from PCM (using DVOM for basic test or oscilloscope for waveform). No switching indicates open circuit or PCM driver issue.
  7. Swap test: swap coil E with another cylinder's coil. If the code/misfire follows the coil, replace the coil. If it stays on the same cylinder, suspect wiring or PCM.
  8. Wiring continuity: with ignition off, check continuity between coil control pin and the PCM driver pin; check for shorts to ground or battery. Repair any wiring faults.
  9. PCM check: if wiring and coil are good but no control signal, follow manufacturer procedures to test PCM driver before replacing ECM (some PCM repairs require bench testing or module replacement).
  10. Clear codes and road test: after repair, clear codes, confirm no return of P0355 and no misfire. Re-scan to ensure no additional faults.

Likely causes

  • Damaged or disconnected coil connector for coil E
  • Broken wire or poor continuity between coil connector and PCM
  • Failed ignition coil (internal open primary)
  • Corroded or bent pins causing high resistance
  • ECM/PCM driver failure (less common) or software fault

Fault status

⚠️ Status
DTC P0355 — Ignition Coil E Primary Control Circuit/Open. ECM detected an open or fault in the primary/control circuit for coil E. MIL may be illuminated and associated cylinder misfire recorded.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours

Similar codes

P0350 P0351 P0352 P0353 P0354 P0356
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Code

P0355

HUMMER P — Powertrain

Ignition Coil 5 Control Circuit

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

Causes

  • Open or shorted primary wiring (connector, broken conductor, pin damage)
  • Corroded or loose coil connector or terminals
  • Failed ignition coil (primary winding or integrated driver)
  • Faulty ECM/PCM ignition driver transistor
  • Blown fuse or failed ignition/coil power supply/relay
  • Intermittent contact due to heat/vibration

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Misfire or rough running on the cylinder served by coil E
  • Reduced engine performance, hesitation, or stumble
  • Possible poor fuel economy
  • Hard starting or no start in severe cases

What to check

  • Retrieve freeze frame data and pending/confirmed codes; identify which cylinder is coil E on this vehicle
  • Visual inspection of coil E, connector, wiring harness and pins for damage or corrosion
  • Check related fuses and ignition power/relay circuits
  • Measure coil primary resistance (compare to spec or another coil)
  • Back-probe coil connector while cranking to verify supply and switching signal
  • Swap coil E with a known good coil from another cylinder to see if code follows the coil

Signal parameters

  • Primary supply voltage: ~12 V (battery) on the Vbat/power pin when ignition ON
  • Primary control pin: pulsed ground or switched positive from PCM during cranking/run (0 V to ~12 V depending on design)
  • Primary coil resistance (typical): approximately 0.2 - 3.0 ohms (varies by coil type; compare to spec)
  • Primary current pulse during dwell: several amps (varies by design)
  • Dwell time and pulse frequency vary with engine speed and load; waveform should show regular pulses when engine is cranking/running

Diagnostic algorithm

  1. Safety: park vehicle, key off, wear eye protection. Disconnect battery only if specified by manufacturer before connector work.
  2. Scan: read and record all DTCs and freeze frame data. Note if P0355 is confirmed or pending and any misfire codes (eg. P0305).
  3. Visual: inspect coil E, connector, wiring harness routing for chafing, heat damage, melted insulation, corrosion or bent pins.
  4. Power check: with key ON, verify battery voltage is present at the coil power terminal (if coil requires constant 12 V). Check fuse/relay for coil power.
  5. Resistance test: disconnect coil and measure primary winding resistance; compare to specification or another known-good coil of same type. An open or far-out-of-spec reading indicates a bad coil.
  6. Signal test while cranking/running: reconnect and back-probe the coil control terminal. Verify switching pulses from PCM (using DVOM for basic test or oscilloscope for waveform). No switching indicates open circuit or PCM driver issue.
  7. Swap test: swap coil E with another cylinder's coil. If the code/misfire follows the coil, replace the coil. If it stays on the same cylinder, suspect wiring or PCM.
  8. Wiring continuity: with ignition off, check continuity between coil control pin and the PCM driver pin; check for shorts to ground or battery. Repair any wiring faults.
  9. PCM check: if wiring and coil are good but no control signal, follow manufacturer procedures to test PCM driver before replacing ECM (some PCM repairs require bench testing or module replacement).
  10. Clear codes and road test: after repair, clear codes, confirm no return of P0355 and no misfire. Re-scan to ensure no additional faults.

Likely causes

  • Damaged or disconnected coil connector for coil E
  • Broken wire or poor continuity between coil connector and PCM
  • Failed ignition coil (internal open primary)
  • Corroded or bent pins causing high resistance
  • ECM/PCM driver failure (less common) or software fault

Fault status

⚠️ Status
DTC P0355 — Ignition Coil E Primary Control Circuit/Open. ECM detected an open or fault in the primary/control circuit for coil E. MIL may be illuminated and associated cylinder misfire recorded.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours

Similar codes

P0350 P0351 P0352 P0353 P0354 P0356
Repair manuals

Manual library for HUMMER

138

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Code

P0355

LAND ROVER P — Powertrain

Malfunction of the primary/secondary circuit ignition coil E

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

Causes

  • Open or shorted primary wiring (connector, broken conductor, pin damage)
  • Corroded or loose coil connector or terminals
  • Failed ignition coil (primary winding or integrated driver)
  • Faulty ECM/PCM ignition driver transistor
  • Blown fuse or failed ignition/coil power supply/relay
  • Intermittent contact due to heat/vibration

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Misfire or rough running on the cylinder served by coil E
  • Reduced engine performance, hesitation, or stumble
  • Possible poor fuel economy
  • Hard starting or no start in severe cases

What to check

  • Retrieve freeze frame data and pending/confirmed codes; identify which cylinder is coil E on this vehicle
  • Visual inspection of coil E, connector, wiring harness and pins for damage or corrosion
  • Check related fuses and ignition power/relay circuits
  • Measure coil primary resistance (compare to spec or another coil)
  • Back-probe coil connector while cranking to verify supply and switching signal
  • Swap coil E with a known good coil from another cylinder to see if code follows the coil

Signal parameters

  • Primary supply voltage: ~12 V (battery) on the Vbat/power pin when ignition ON
  • Primary control pin: pulsed ground or switched positive from PCM during cranking/run (0 V to ~12 V depending on design)
  • Primary coil resistance (typical): approximately 0.2 - 3.0 ohms (varies by coil type; compare to spec)
  • Primary current pulse during dwell: several amps (varies by design)
  • Dwell time and pulse frequency vary with engine speed and load; waveform should show regular pulses when engine is cranking/running

Diagnostic algorithm

  1. Safety: park vehicle, key off, wear eye protection. Disconnect battery only if specified by manufacturer before connector work.
  2. Scan: read and record all DTCs and freeze frame data. Note if P0355 is confirmed or pending and any misfire codes (eg. P0305).
  3. Visual: inspect coil E, connector, wiring harness routing for chafing, heat damage, melted insulation, corrosion or bent pins.
  4. Power check: with key ON, verify battery voltage is present at the coil power terminal (if coil requires constant 12 V). Check fuse/relay for coil power.
  5. Resistance test: disconnect coil and measure primary winding resistance; compare to specification or another known-good coil of same type. An open or far-out-of-spec reading indicates a bad coil.
  6. Signal test while cranking/running: reconnect and back-probe the coil control terminal. Verify switching pulses from PCM (using DVOM for basic test or oscilloscope for waveform). No switching indicates open circuit or PCM driver issue.
  7. Swap test: swap coil E with another cylinder's coil. If the code/misfire follows the coil, replace the coil. If it stays on the same cylinder, suspect wiring or PCM.
  8. Wiring continuity: with ignition off, check continuity between coil control pin and the PCM driver pin; check for shorts to ground or battery. Repair any wiring faults.
  9. PCM check: if wiring and coil are good but no control signal, follow manufacturer procedures to test PCM driver before replacing ECM (some PCM repairs require bench testing or module replacement).
  10. Clear codes and road test: after repair, clear codes, confirm no return of P0355 and no misfire. Re-scan to ensure no additional faults.

Likely causes

  • Damaged or disconnected coil connector for coil E
  • Broken wire or poor continuity between coil connector and PCM
  • Failed ignition coil (internal open primary)
  • Corroded or bent pins causing high resistance
  • ECM/PCM driver failure (less common) or software fault

Fault status

⚠️ Status
DTC P0355 — Ignition Coil E Primary Control Circuit/Open. ECM detected an open or fault in the primary/control circuit for coil E. MIL may be illuminated and associated cylinder misfire recorded.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours

Similar codes

P0350 P0351 P0352 P0353 P0354 P0356
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
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