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Home / DTC / P1356 — Misfire During Start Cylinder 8

P1356 — Misfire During Start Cylinder 8

Detailed page for trouble code P1356.

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Code

P1356

BMW P — Powertrain

Misfire During Start Cylinder 8

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

Causes

  • Faulty ignition coil for cylinder 8
  • Worn/fouled spark plug (cylinder 8)
  • Faulty or clogged fuel injector for cylinder 8
  • Open/short in injector or coil wiring or poor connector/ground
  • Low compression or mechanical issue in cylinder 8 (valve, piston, head gasket)
  • Weak battery or poor starter performance causing inadequate cranking

Symptoms

  • Long or rough cranking on initial start
  • Engine misfires or runs rough immediately after start
  • Check Engine Light (MIL) illuminated or stored P1356 (and possibly P0308)
  • Poor startability or extended crank time
  • Strong fuel smell from exhaust during/after cranking
  • Possible increased crank noise or lack of power until engine clears misfire

What to check

  • Read all stored/active codes and freeze frame data; note other related codes (P0308, P0358, P0316, etc.)
  • View live data during crank and first seconds of run — crank RPM, misfire counters, fuel injection pulse widths, ignition dwell/coil status
  • Check battery voltage during cranking (should stay above ~9.5–10 V)
  • Inspect coil pack and spark plug on cylinder 8 for damage, corrosion, carbon tracking, or fouling
  • Swap coil 8 with another cylinder’s coil and re-crank to see if misfire follows the coil
  • Swap injector 8 with another cylinder’s injector (or use a noid light/ammeter) to test injector operation

Signal parameters

  • Crankshaft speed (RPM) during cranking
  • Cylinder-specific misfire counters and misfire index
  • Ignition coil primary/secondary voltage and dwell signal (cylinder 8)
  • Injector pulse width and injector electrical current (cylinder 8)
  • Battery voltage during start/crank
  • Fuel rail pressure during cranking

Diagnostic algorithm

  1. Retrieve codes and freeze-frame; note related codes (P0308, P0358, P0316, P0208, etc.).
  2. Inspect battery and starter performance; verify adequate cranking voltage. Low voltage can mimic misfire.
  3. Visually inspect coil pack, spark plug, and wiring for cylinder 8. Replace obvious damaged components.
  4. Swap cylinder 8 coil with a known-good coil from another cylinder and re-crank. If misfire moves to the other cylinder, replace the coil.
  5. If coil swap didn’t move the fault, swap or bench-test injector 8, or use a noid light/ammeter to confirm injector pulse and current. Listen for injector click.
  6. Backprobe coil primary and secondary with an oscilloscope or multimeter during cranking to confirm proper ignition waveform and sufficient spark energy.
  7. Perform a compression and/or leak-down test on cylinder 8 if ignition and fueling check good; low compression indicates mechanical failure.
  8. Inspect/repair any damaged wiring, poor grounds, or connector corrosion found at coil/injector/PCM harness. Repair and protect harness.
  9. Clear codes and repeat start/crank test. If intermittent, perform several cold/hot starts to confirm repair. If fault persists, consider PCM or sensor replacement after verifying wiring and components.
  10. If multiple cylinders show related issues, expand diagnosis to fuel rail, fuel pump, cam/crank sensors, and PCM as needed.

Likely causes

  • Defective ignition coil on cylinder 8
  • Bad or fouled spark plug in cylinder 8
  • Faulty fuel injector or wiring for cylinder 8
  • Intermittent connector or poor ground at cylinder 8 components
  • Low compression in cylinder 8 (ring, valve, head gasket)

Fault status

⚠️ Status
Misfire detected on cylinder 8 during engine start/crank (BMW P1356). MIL may be set. Repeated misfires can damage catalytic converter and increase emissions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

P0308 P0316 P0300 P0358 P0208 P0335
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Code

P1356

BUICK P — Powertrain

IC Output High/Pulse Detected When Grounded Cyl.6

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

Causes

  • Faulty ignition coil for cylinder 8
  • Worn/fouled spark plug (cylinder 8)
  • Faulty or clogged fuel injector for cylinder 8
  • Open/short in injector or coil wiring or poor connector/ground
  • Low compression or mechanical issue in cylinder 8 (valve, piston, head gasket)
  • Weak battery or poor starter performance causing inadequate cranking

Symptoms

  • Long or rough cranking on initial start
  • Engine misfires or runs rough immediately after start
  • Check Engine Light (MIL) illuminated or stored P1356 (and possibly P0308)
  • Poor startability or extended crank time
  • Strong fuel smell from exhaust during/after cranking
  • Possible increased crank noise or lack of power until engine clears misfire

What to check

  • Read all stored/active codes and freeze frame data; note other related codes (P0308, P0358, P0316, etc.)
  • View live data during crank and first seconds of run — crank RPM, misfire counters, fuel injection pulse widths, ignition dwell/coil status
  • Check battery voltage during cranking (should stay above ~9.5–10 V)
  • Inspect coil pack and spark plug on cylinder 8 for damage, corrosion, carbon tracking, or fouling
  • Swap coil 8 with another cylinder’s coil and re-crank to see if misfire follows the coil
  • Swap injector 8 with another cylinder’s injector (or use a noid light/ammeter) to test injector operation

Signal parameters

  • Crankshaft speed (RPM) during cranking
  • Cylinder-specific misfire counters and misfire index
  • Ignition coil primary/secondary voltage and dwell signal (cylinder 8)
  • Injector pulse width and injector electrical current (cylinder 8)
  • Battery voltage during start/crank
  • Fuel rail pressure during cranking

Diagnostic algorithm

  1. Retrieve codes and freeze-frame; note related codes (P0308, P0358, P0316, P0208, etc.).
  2. Inspect battery and starter performance; verify adequate cranking voltage. Low voltage can mimic misfire.
  3. Visually inspect coil pack, spark plug, and wiring for cylinder 8. Replace obvious damaged components.
  4. Swap cylinder 8 coil with a known-good coil from another cylinder and re-crank. If misfire moves to the other cylinder, replace the coil.
  5. If coil swap didn’t move the fault, swap or bench-test injector 8, or use a noid light/ammeter to confirm injector pulse and current. Listen for injector click.
  6. Backprobe coil primary and secondary with an oscilloscope or multimeter during cranking to confirm proper ignition waveform and sufficient spark energy.
  7. Perform a compression and/or leak-down test on cylinder 8 if ignition and fueling check good; low compression indicates mechanical failure.
  8. Inspect/repair any damaged wiring, poor grounds, or connector corrosion found at coil/injector/PCM harness. Repair and protect harness.
  9. Clear codes and repeat start/crank test. If intermittent, perform several cold/hot starts to confirm repair. If fault persists, consider PCM or sensor replacement after verifying wiring and components.
  10. If multiple cylinders show related issues, expand diagnosis to fuel rail, fuel pump, cam/crank sensors, and PCM as needed.

Likely causes

  • Defective ignition coil on cylinder 8
  • Bad or fouled spark plug in cylinder 8
  • Faulty fuel injector or wiring for cylinder 8
  • Intermittent connector or poor ground at cylinder 8 components
  • Low compression in cylinder 8 (ring, valve, head gasket)

Fault status

⚠️ Status
Misfire detected on cylinder 8 during engine start/crank (BMW P1356). MIL may be set. Repeated misfires can damage catalytic converter and increase emissions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

P0308 P0316 P0300 P0358 P0208 P0335
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Code

P1356

CADILLAC P — Powertrain

IC Output High/Pulse Detected When Grounded Cyl.6

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

Causes

  • Faulty ignition coil for cylinder 8
  • Worn/fouled spark plug (cylinder 8)
  • Faulty or clogged fuel injector for cylinder 8
  • Open/short in injector or coil wiring or poor connector/ground
  • Low compression or mechanical issue in cylinder 8 (valve, piston, head gasket)
  • Weak battery or poor starter performance causing inadequate cranking

Symptoms

  • Long or rough cranking on initial start
  • Engine misfires or runs rough immediately after start
  • Check Engine Light (MIL) illuminated or stored P1356 (and possibly P0308)
  • Poor startability or extended crank time
  • Strong fuel smell from exhaust during/after cranking
  • Possible increased crank noise or lack of power until engine clears misfire

What to check

  • Read all stored/active codes and freeze frame data; note other related codes (P0308, P0358, P0316, etc.)
  • View live data during crank and first seconds of run — crank RPM, misfire counters, fuel injection pulse widths, ignition dwell/coil status
  • Check battery voltage during cranking (should stay above ~9.5–10 V)
  • Inspect coil pack and spark plug on cylinder 8 for damage, corrosion, carbon tracking, or fouling
  • Swap coil 8 with another cylinder’s coil and re-crank to see if misfire follows the coil
  • Swap injector 8 with another cylinder’s injector (or use a noid light/ammeter) to test injector operation

Signal parameters

  • Crankshaft speed (RPM) during cranking
  • Cylinder-specific misfire counters and misfire index
  • Ignition coil primary/secondary voltage and dwell signal (cylinder 8)
  • Injector pulse width and injector electrical current (cylinder 8)
  • Battery voltage during start/crank
  • Fuel rail pressure during cranking

Diagnostic algorithm

  1. Retrieve codes and freeze-frame; note related codes (P0308, P0358, P0316, P0208, etc.).
  2. Inspect battery and starter performance; verify adequate cranking voltage. Low voltage can mimic misfire.
  3. Visually inspect coil pack, spark plug, and wiring for cylinder 8. Replace obvious damaged components.
  4. Swap cylinder 8 coil with a known-good coil from another cylinder and re-crank. If misfire moves to the other cylinder, replace the coil.
  5. If coil swap didn’t move the fault, swap or bench-test injector 8, or use a noid light/ammeter to confirm injector pulse and current. Listen for injector click.
  6. Backprobe coil primary and secondary with an oscilloscope or multimeter during cranking to confirm proper ignition waveform and sufficient spark energy.
  7. Perform a compression and/or leak-down test on cylinder 8 if ignition and fueling check good; low compression indicates mechanical failure.
  8. Inspect/repair any damaged wiring, poor grounds, or connector corrosion found at coil/injector/PCM harness. Repair and protect harness.
  9. Clear codes and repeat start/crank test. If intermittent, perform several cold/hot starts to confirm repair. If fault persists, consider PCM or sensor replacement after verifying wiring and components.
  10. If multiple cylinders show related issues, expand diagnosis to fuel rail, fuel pump, cam/crank sensors, and PCM as needed.

Likely causes

  • Defective ignition coil on cylinder 8
  • Bad or fouled spark plug in cylinder 8
  • Faulty fuel injector or wiring for cylinder 8
  • Intermittent connector or poor ground at cylinder 8 components
  • Low compression in cylinder 8 (ring, valve, head gasket)

Fault status

⚠️ Status
Misfire detected on cylinder 8 during engine start/crank (BMW P1356). MIL may be set. Repeated misfires can damage catalytic converter and increase emissions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

P0308 P0316 P0300 P0358 P0208 P0335
206

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Code

P1356

CHEVROLET P — Powertrain

IC Output High/Pulse Detected When Grounded Cyl.6

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

Causes

  • Faulty ignition coil for cylinder 8
  • Worn/fouled spark plug (cylinder 8)
  • Faulty or clogged fuel injector for cylinder 8
  • Open/short in injector or coil wiring or poor connector/ground
  • Low compression or mechanical issue in cylinder 8 (valve, piston, head gasket)
  • Weak battery or poor starter performance causing inadequate cranking

Symptoms

  • Long or rough cranking on initial start
  • Engine misfires or runs rough immediately after start
  • Check Engine Light (MIL) illuminated or stored P1356 (and possibly P0308)
  • Poor startability or extended crank time
  • Strong fuel smell from exhaust during/after cranking
  • Possible increased crank noise or lack of power until engine clears misfire

What to check

  • Read all stored/active codes and freeze frame data; note other related codes (P0308, P0358, P0316, etc.)
  • View live data during crank and first seconds of run — crank RPM, misfire counters, fuel injection pulse widths, ignition dwell/coil status
  • Check battery voltage during cranking (should stay above ~9.5–10 V)
  • Inspect coil pack and spark plug on cylinder 8 for damage, corrosion, carbon tracking, or fouling
  • Swap coil 8 with another cylinder’s coil and re-crank to see if misfire follows the coil
  • Swap injector 8 with another cylinder’s injector (or use a noid light/ammeter) to test injector operation

Signal parameters

  • Crankshaft speed (RPM) during cranking
  • Cylinder-specific misfire counters and misfire index
  • Ignition coil primary/secondary voltage and dwell signal (cylinder 8)
  • Injector pulse width and injector electrical current (cylinder 8)
  • Battery voltage during start/crank
  • Fuel rail pressure during cranking

Diagnostic algorithm

  1. Retrieve codes and freeze-frame; note related codes (P0308, P0358, P0316, P0208, etc.).
  2. Inspect battery and starter performance; verify adequate cranking voltage. Low voltage can mimic misfire.
  3. Visually inspect coil pack, spark plug, and wiring for cylinder 8. Replace obvious damaged components.
  4. Swap cylinder 8 coil with a known-good coil from another cylinder and re-crank. If misfire moves to the other cylinder, replace the coil.
  5. If coil swap didn’t move the fault, swap or bench-test injector 8, or use a noid light/ammeter to confirm injector pulse and current. Listen for injector click.
  6. Backprobe coil primary and secondary with an oscilloscope or multimeter during cranking to confirm proper ignition waveform and sufficient spark energy.
  7. Perform a compression and/or leak-down test on cylinder 8 if ignition and fueling check good; low compression indicates mechanical failure.
  8. Inspect/repair any damaged wiring, poor grounds, or connector corrosion found at coil/injector/PCM harness. Repair and protect harness.
  9. Clear codes and repeat start/crank test. If intermittent, perform several cold/hot starts to confirm repair. If fault persists, consider PCM or sensor replacement after verifying wiring and components.
  10. If multiple cylinders show related issues, expand diagnosis to fuel rail, fuel pump, cam/crank sensors, and PCM as needed.

Likely causes

  • Defective ignition coil on cylinder 8
  • Bad or fouled spark plug in cylinder 8
  • Faulty fuel injector or wiring for cylinder 8
  • Intermittent connector or poor ground at cylinder 8 components
  • Low compression in cylinder 8 (ring, valve, head gasket)

Fault status

⚠️ Status
Misfire detected on cylinder 8 during engine start/crank (BMW P1356). MIL may be set. Repeated misfires can damage catalytic converter and increase emissions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

P0308 P0316 P0300 P0358 P0208 P0335
456

Browse 456 CHEVROLET manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

CHEVROLET

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Code

P1356

CHRYSLER P — Powertrain

IC Output High Pulse Detected When Grounded Cyl 6

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

Causes

  • Faulty ignition coil for cylinder 8
  • Worn/fouled spark plug (cylinder 8)
  • Faulty or clogged fuel injector for cylinder 8
  • Open/short in injector or coil wiring or poor connector/ground
  • Low compression or mechanical issue in cylinder 8 (valve, piston, head gasket)
  • Weak battery or poor starter performance causing inadequate cranking

Symptoms

  • Long or rough cranking on initial start
  • Engine misfires or runs rough immediately after start
  • Check Engine Light (MIL) illuminated or stored P1356 (and possibly P0308)
  • Poor startability or extended crank time
  • Strong fuel smell from exhaust during/after cranking
  • Possible increased crank noise or lack of power until engine clears misfire

What to check

  • Read all stored/active codes and freeze frame data; note other related codes (P0308, P0358, P0316, etc.)
  • View live data during crank and first seconds of run — crank RPM, misfire counters, fuel injection pulse widths, ignition dwell/coil status
  • Check battery voltage during cranking (should stay above ~9.5–10 V)
  • Inspect coil pack and spark plug on cylinder 8 for damage, corrosion, carbon tracking, or fouling
  • Swap coil 8 with another cylinder’s coil and re-crank to see if misfire follows the coil
  • Swap injector 8 with another cylinder’s injector (or use a noid light/ammeter) to test injector operation

Signal parameters

  • Crankshaft speed (RPM) during cranking
  • Cylinder-specific misfire counters and misfire index
  • Ignition coil primary/secondary voltage and dwell signal (cylinder 8)
  • Injector pulse width and injector electrical current (cylinder 8)
  • Battery voltage during start/crank
  • Fuel rail pressure during cranking

Diagnostic algorithm

  1. Retrieve codes and freeze-frame; note related codes (P0308, P0358, P0316, P0208, etc.).
  2. Inspect battery and starter performance; verify adequate cranking voltage. Low voltage can mimic misfire.
  3. Visually inspect coil pack, spark plug, and wiring for cylinder 8. Replace obvious damaged components.
  4. Swap cylinder 8 coil with a known-good coil from another cylinder and re-crank. If misfire moves to the other cylinder, replace the coil.
  5. If coil swap didn’t move the fault, swap or bench-test injector 8, or use a noid light/ammeter to confirm injector pulse and current. Listen for injector click.
  6. Backprobe coil primary and secondary with an oscilloscope or multimeter during cranking to confirm proper ignition waveform and sufficient spark energy.
  7. Perform a compression and/or leak-down test on cylinder 8 if ignition and fueling check good; low compression indicates mechanical failure.
  8. Inspect/repair any damaged wiring, poor grounds, or connector corrosion found at coil/injector/PCM harness. Repair and protect harness.
  9. Clear codes and repeat start/crank test. If intermittent, perform several cold/hot starts to confirm repair. If fault persists, consider PCM or sensor replacement after verifying wiring and components.
  10. If multiple cylinders show related issues, expand diagnosis to fuel rail, fuel pump, cam/crank sensors, and PCM as needed.

Likely causes

  • Defective ignition coil on cylinder 8
  • Bad or fouled spark plug in cylinder 8
  • Faulty fuel injector or wiring for cylinder 8
  • Intermittent connector or poor ground at cylinder 8 components
  • Low compression in cylinder 8 (ring, valve, head gasket)

Fault status

⚠️ Status
Misfire detected on cylinder 8 during engine start/crank (BMW P1356). MIL may be set. Repeated misfires can damage catalytic converter and increase emissions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

P0308 P0316 P0300 P0358 P0208 P0335
193

Browse 193 CHRYSLER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

CHRYSLER

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Code

P1356

DAEWOO P — Powertrain

#6 MISFIRE CIRCUIT - SHORT

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

Causes

  • Faulty ignition coil for cylinder 8
  • Worn/fouled spark plug (cylinder 8)
  • Faulty or clogged fuel injector for cylinder 8
  • Open/short in injector or coil wiring or poor connector/ground
  • Low compression or mechanical issue in cylinder 8 (valve, piston, head gasket)
  • Weak battery or poor starter performance causing inadequate cranking

Symptoms

  • Long or rough cranking on initial start
  • Engine misfires or runs rough immediately after start
  • Check Engine Light (MIL) illuminated or stored P1356 (and possibly P0308)
  • Poor startability or extended crank time
  • Strong fuel smell from exhaust during/after cranking
  • Possible increased crank noise or lack of power until engine clears misfire

What to check

  • Read all stored/active codes and freeze frame data; note other related codes (P0308, P0358, P0316, etc.)
  • View live data during crank and first seconds of run — crank RPM, misfire counters, fuel injection pulse widths, ignition dwell/coil status
  • Check battery voltage during cranking (should stay above ~9.5–10 V)
  • Inspect coil pack and spark plug on cylinder 8 for damage, corrosion, carbon tracking, or fouling
  • Swap coil 8 with another cylinder’s coil and re-crank to see if misfire follows the coil
  • Swap injector 8 with another cylinder’s injector (or use a noid light/ammeter) to test injector operation

Signal parameters

  • Crankshaft speed (RPM) during cranking
  • Cylinder-specific misfire counters and misfire index
  • Ignition coil primary/secondary voltage and dwell signal (cylinder 8)
  • Injector pulse width and injector electrical current (cylinder 8)
  • Battery voltage during start/crank
  • Fuel rail pressure during cranking

Diagnostic algorithm

  1. Retrieve codes and freeze-frame; note related codes (P0308, P0358, P0316, P0208, etc.).
  2. Inspect battery and starter performance; verify adequate cranking voltage. Low voltage can mimic misfire.
  3. Visually inspect coil pack, spark plug, and wiring for cylinder 8. Replace obvious damaged components.
  4. Swap cylinder 8 coil with a known-good coil from another cylinder and re-crank. If misfire moves to the other cylinder, replace the coil.
  5. If coil swap didn’t move the fault, swap or bench-test injector 8, or use a noid light/ammeter to confirm injector pulse and current. Listen for injector click.
  6. Backprobe coil primary and secondary with an oscilloscope or multimeter during cranking to confirm proper ignition waveform and sufficient spark energy.
  7. Perform a compression and/or leak-down test on cylinder 8 if ignition and fueling check good; low compression indicates mechanical failure.
  8. Inspect/repair any damaged wiring, poor grounds, or connector corrosion found at coil/injector/PCM harness. Repair and protect harness.
  9. Clear codes and repeat start/crank test. If intermittent, perform several cold/hot starts to confirm repair. If fault persists, consider PCM or sensor replacement after verifying wiring and components.
  10. If multiple cylinders show related issues, expand diagnosis to fuel rail, fuel pump, cam/crank sensors, and PCM as needed.

Likely causes

  • Defective ignition coil on cylinder 8
  • Bad or fouled spark plug in cylinder 8
  • Faulty fuel injector or wiring for cylinder 8
  • Intermittent connector or poor ground at cylinder 8 components
  • Low compression in cylinder 8 (ring, valve, head gasket)

Fault status

⚠️ Status
Misfire detected on cylinder 8 during engine start/crank (BMW P1356). MIL may be set. Repeated misfires can damage catalytic converter and increase emissions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

P0308 P0316 P0300 P0358 P0208 P0335
Repair manuals

Manual library for DAEWOO

75

Browse 75 DAEWOO manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

DAEWOO

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Keep it short and practical. Up to 500 characters.
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Code

P1356

FORD P — Powertrain

Loss of Ignition Diagnostic Module Input to PCM

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

Causes

  • Faulty ignition coil for cylinder 8
  • Worn/fouled spark plug (cylinder 8)
  • Faulty or clogged fuel injector for cylinder 8
  • Open/short in injector or coil wiring or poor connector/ground
  • Low compression or mechanical issue in cylinder 8 (valve, piston, head gasket)
  • Weak battery or poor starter performance causing inadequate cranking

Symptoms

  • Long or rough cranking on initial start
  • Engine misfires or runs rough immediately after start
  • Check Engine Light (MIL) illuminated or stored P1356 (and possibly P0308)
  • Poor startability or extended crank time
  • Strong fuel smell from exhaust during/after cranking
  • Possible increased crank noise or lack of power until engine clears misfire

What to check

  • Read all stored/active codes and freeze frame data; note other related codes (P0308, P0358, P0316, etc.)
  • View live data during crank and first seconds of run — crank RPM, misfire counters, fuel injection pulse widths, ignition dwell/coil status
  • Check battery voltage during cranking (should stay above ~9.5–10 V)
  • Inspect coil pack and spark plug on cylinder 8 for damage, corrosion, carbon tracking, or fouling
  • Swap coil 8 with another cylinder’s coil and re-crank to see if misfire follows the coil
  • Swap injector 8 with another cylinder’s injector (or use a noid light/ammeter) to test injector operation

Signal parameters

  • Crankshaft speed (RPM) during cranking
  • Cylinder-specific misfire counters and misfire index
  • Ignition coil primary/secondary voltage and dwell signal (cylinder 8)
  • Injector pulse width and injector electrical current (cylinder 8)
  • Battery voltage during start/crank
  • Fuel rail pressure during cranking

Diagnostic algorithm

  1. Retrieve codes and freeze-frame; note related codes (P0308, P0358, P0316, P0208, etc.).
  2. Inspect battery and starter performance; verify adequate cranking voltage. Low voltage can mimic misfire.
  3. Visually inspect coil pack, spark plug, and wiring for cylinder 8. Replace obvious damaged components.
  4. Swap cylinder 8 coil with a known-good coil from another cylinder and re-crank. If misfire moves to the other cylinder, replace the coil.
  5. If coil swap didn’t move the fault, swap or bench-test injector 8, or use a noid light/ammeter to confirm injector pulse and current. Listen for injector click.
  6. Backprobe coil primary and secondary with an oscilloscope or multimeter during cranking to confirm proper ignition waveform and sufficient spark energy.
  7. Perform a compression and/or leak-down test on cylinder 8 if ignition and fueling check good; low compression indicates mechanical failure.
  8. Inspect/repair any damaged wiring, poor grounds, or connector corrosion found at coil/injector/PCM harness. Repair and protect harness.
  9. Clear codes and repeat start/crank test. If intermittent, perform several cold/hot starts to confirm repair. If fault persists, consider PCM or sensor replacement after verifying wiring and components.
  10. If multiple cylinders show related issues, expand diagnosis to fuel rail, fuel pump, cam/crank sensors, and PCM as needed.

Likely causes

  • Defective ignition coil on cylinder 8
  • Bad or fouled spark plug in cylinder 8
  • Faulty fuel injector or wiring for cylinder 8
  • Intermittent connector or poor ground at cylinder 8 components
  • Low compression in cylinder 8 (ring, valve, head gasket)

Fault status

⚠️ Status
Misfire detected on cylinder 8 during engine start/crank (BMW P1356). MIL may be set. Repeated misfires can damage catalytic converter and increase emissions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

P0308 P0316 P0300 P0358 P0208 P0335
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Code

P1356

GM P — Powertrain

IC Output High Pulse Detected When Grounded Cyl 6

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

Causes

  • Faulty ignition coil for cylinder 8
  • Worn/fouled spark plug (cylinder 8)
  • Faulty or clogged fuel injector for cylinder 8
  • Open/short in injector or coil wiring or poor connector/ground
  • Low compression or mechanical issue in cylinder 8 (valve, piston, head gasket)
  • Weak battery or poor starter performance causing inadequate cranking

Symptoms

  • Long or rough cranking on initial start
  • Engine misfires or runs rough immediately after start
  • Check Engine Light (MIL) illuminated or stored P1356 (and possibly P0308)
  • Poor startability or extended crank time
  • Strong fuel smell from exhaust during/after cranking
  • Possible increased crank noise or lack of power until engine clears misfire

What to check

  • Read all stored/active codes and freeze frame data; note other related codes (P0308, P0358, P0316, etc.)
  • View live data during crank and first seconds of run — crank RPM, misfire counters, fuel injection pulse widths, ignition dwell/coil status
  • Check battery voltage during cranking (should stay above ~9.5–10 V)
  • Inspect coil pack and spark plug on cylinder 8 for damage, corrosion, carbon tracking, or fouling
  • Swap coil 8 with another cylinder’s coil and re-crank to see if misfire follows the coil
  • Swap injector 8 with another cylinder’s injector (or use a noid light/ammeter) to test injector operation

Signal parameters

  • Crankshaft speed (RPM) during cranking
  • Cylinder-specific misfire counters and misfire index
  • Ignition coil primary/secondary voltage and dwell signal (cylinder 8)
  • Injector pulse width and injector electrical current (cylinder 8)
  • Battery voltage during start/crank
  • Fuel rail pressure during cranking

Diagnostic algorithm

  1. Retrieve codes and freeze-frame; note related codes (P0308, P0358, P0316, P0208, etc.).
  2. Inspect battery and starter performance; verify adequate cranking voltage. Low voltage can mimic misfire.
  3. Visually inspect coil pack, spark plug, and wiring for cylinder 8. Replace obvious damaged components.
  4. Swap cylinder 8 coil with a known-good coil from another cylinder and re-crank. If misfire moves to the other cylinder, replace the coil.
  5. If coil swap didn’t move the fault, swap or bench-test injector 8, or use a noid light/ammeter to confirm injector pulse and current. Listen for injector click.
  6. Backprobe coil primary and secondary with an oscilloscope or multimeter during cranking to confirm proper ignition waveform and sufficient spark energy.
  7. Perform a compression and/or leak-down test on cylinder 8 if ignition and fueling check good; low compression indicates mechanical failure.
  8. Inspect/repair any damaged wiring, poor grounds, or connector corrosion found at coil/injector/PCM harness. Repair and protect harness.
  9. Clear codes and repeat start/crank test. If intermittent, perform several cold/hot starts to confirm repair. If fault persists, consider PCM or sensor replacement after verifying wiring and components.
  10. If multiple cylinders show related issues, expand diagnosis to fuel rail, fuel pump, cam/crank sensors, and PCM as needed.

Likely causes

  • Defective ignition coil on cylinder 8
  • Bad or fouled spark plug in cylinder 8
  • Faulty fuel injector or wiring for cylinder 8
  • Intermittent connector or poor ground at cylinder 8 components
  • Low compression in cylinder 8 (ring, valve, head gasket)

Fault status

⚠️ Status
Misfire detected on cylinder 8 during engine start/crank (BMW P1356). MIL may be set. Repeated misfires can damage catalytic converter and increase emissions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

P0308 P0316 P0300 P0358 P0208 P0335
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Code

P1356

GMC P — Powertrain

IC Output High Pulse Detected When Grounded Cyl 6

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

Causes

  • Faulty ignition coil for cylinder 8
  • Worn/fouled spark plug (cylinder 8)
  • Faulty or clogged fuel injector for cylinder 8
  • Open/short in injector or coil wiring or poor connector/ground
  • Low compression or mechanical issue in cylinder 8 (valve, piston, head gasket)
  • Weak battery or poor starter performance causing inadequate cranking

Symptoms

  • Long or rough cranking on initial start
  • Engine misfires or runs rough immediately after start
  • Check Engine Light (MIL) illuminated or stored P1356 (and possibly P0308)
  • Poor startability or extended crank time
  • Strong fuel smell from exhaust during/after cranking
  • Possible increased crank noise or lack of power until engine clears misfire

What to check

  • Read all stored/active codes and freeze frame data; note other related codes (P0308, P0358, P0316, etc.)
  • View live data during crank and first seconds of run — crank RPM, misfire counters, fuel injection pulse widths, ignition dwell/coil status
  • Check battery voltage during cranking (should stay above ~9.5–10 V)
  • Inspect coil pack and spark plug on cylinder 8 for damage, corrosion, carbon tracking, or fouling
  • Swap coil 8 with another cylinder’s coil and re-crank to see if misfire follows the coil
  • Swap injector 8 with another cylinder’s injector (or use a noid light/ammeter) to test injector operation

Signal parameters

  • Crankshaft speed (RPM) during cranking
  • Cylinder-specific misfire counters and misfire index
  • Ignition coil primary/secondary voltage and dwell signal (cylinder 8)
  • Injector pulse width and injector electrical current (cylinder 8)
  • Battery voltage during start/crank
  • Fuel rail pressure during cranking

Diagnostic algorithm

  1. Retrieve codes and freeze-frame; note related codes (P0308, P0358, P0316, P0208, etc.).
  2. Inspect battery and starter performance; verify adequate cranking voltage. Low voltage can mimic misfire.
  3. Visually inspect coil pack, spark plug, and wiring for cylinder 8. Replace obvious damaged components.
  4. Swap cylinder 8 coil with a known-good coil from another cylinder and re-crank. If misfire moves to the other cylinder, replace the coil.
  5. If coil swap didn’t move the fault, swap or bench-test injector 8, or use a noid light/ammeter to confirm injector pulse and current. Listen for injector click.
  6. Backprobe coil primary and secondary with an oscilloscope or multimeter during cranking to confirm proper ignition waveform and sufficient spark energy.
  7. Perform a compression and/or leak-down test on cylinder 8 if ignition and fueling check good; low compression indicates mechanical failure.
  8. Inspect/repair any damaged wiring, poor grounds, or connector corrosion found at coil/injector/PCM harness. Repair and protect harness.
  9. Clear codes and repeat start/crank test. If intermittent, perform several cold/hot starts to confirm repair. If fault persists, consider PCM or sensor replacement after verifying wiring and components.
  10. If multiple cylinders show related issues, expand diagnosis to fuel rail, fuel pump, cam/crank sensors, and PCM as needed.

Likely causes

  • Defective ignition coil on cylinder 8
  • Bad or fouled spark plug in cylinder 8
  • Faulty fuel injector or wiring for cylinder 8
  • Intermittent connector or poor ground at cylinder 8 components
  • Low compression in cylinder 8 (ring, valve, head gasket)

Fault status

⚠️ Status
Misfire detected on cylinder 8 during engine start/crank (BMW P1356). MIL may be set. Repeated misfires can damage catalytic converter and increase emissions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

P0308 P0316 P0300 P0358 P0208 P0335
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Code

P1356

HUMMER P — Powertrain

IC Output High/Pulse Detected when GND_Cyl. 6

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

Causes

  • Faulty ignition coil for cylinder 8
  • Worn/fouled spark plug (cylinder 8)
  • Faulty or clogged fuel injector for cylinder 8
  • Open/short in injector or coil wiring or poor connector/ground
  • Low compression or mechanical issue in cylinder 8 (valve, piston, head gasket)
  • Weak battery or poor starter performance causing inadequate cranking

Symptoms

  • Long or rough cranking on initial start
  • Engine misfires or runs rough immediately after start
  • Check Engine Light (MIL) illuminated or stored P1356 (and possibly P0308)
  • Poor startability or extended crank time
  • Strong fuel smell from exhaust during/after cranking
  • Possible increased crank noise or lack of power until engine clears misfire

What to check

  • Read all stored/active codes and freeze frame data; note other related codes (P0308, P0358, P0316, etc.)
  • View live data during crank and first seconds of run — crank RPM, misfire counters, fuel injection pulse widths, ignition dwell/coil status
  • Check battery voltage during cranking (should stay above ~9.5–10 V)
  • Inspect coil pack and spark plug on cylinder 8 for damage, corrosion, carbon tracking, or fouling
  • Swap coil 8 with another cylinder’s coil and re-crank to see if misfire follows the coil
  • Swap injector 8 with another cylinder’s injector (or use a noid light/ammeter) to test injector operation

Signal parameters

  • Crankshaft speed (RPM) during cranking
  • Cylinder-specific misfire counters and misfire index
  • Ignition coil primary/secondary voltage and dwell signal (cylinder 8)
  • Injector pulse width and injector electrical current (cylinder 8)
  • Battery voltage during start/crank
  • Fuel rail pressure during cranking

Diagnostic algorithm

  1. Retrieve codes and freeze-frame; note related codes (P0308, P0358, P0316, P0208, etc.).
  2. Inspect battery and starter performance; verify adequate cranking voltage. Low voltage can mimic misfire.
  3. Visually inspect coil pack, spark plug, and wiring for cylinder 8. Replace obvious damaged components.
  4. Swap cylinder 8 coil with a known-good coil from another cylinder and re-crank. If misfire moves to the other cylinder, replace the coil.
  5. If coil swap didn’t move the fault, swap or bench-test injector 8, or use a noid light/ammeter to confirm injector pulse and current. Listen for injector click.
  6. Backprobe coil primary and secondary with an oscilloscope or multimeter during cranking to confirm proper ignition waveform and sufficient spark energy.
  7. Perform a compression and/or leak-down test on cylinder 8 if ignition and fueling check good; low compression indicates mechanical failure.
  8. Inspect/repair any damaged wiring, poor grounds, or connector corrosion found at coil/injector/PCM harness. Repair and protect harness.
  9. Clear codes and repeat start/crank test. If intermittent, perform several cold/hot starts to confirm repair. If fault persists, consider PCM or sensor replacement after verifying wiring and components.
  10. If multiple cylinders show related issues, expand diagnosis to fuel rail, fuel pump, cam/crank sensors, and PCM as needed.

Likely causes

  • Defective ignition coil on cylinder 8
  • Bad or fouled spark plug in cylinder 8
  • Faulty fuel injector or wiring for cylinder 8
  • Intermittent connector or poor ground at cylinder 8 components
  • Low compression in cylinder 8 (ring, valve, head gasket)

Fault status

⚠️ Status
Misfire detected on cylinder 8 during engine start/crank (BMW P1356). MIL may be set. Repeated misfires can damage catalytic converter and increase emissions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

P0308 P0316 P0300 P0358 P0208 P0335
Repair manuals

Manual library for HUMMER

138

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Code

P1356

LINCOLN P — Powertrain

Loss of Ignition Diagnostic Module Input to PCM

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

Causes

  • Faulty ignition coil for cylinder 8
  • Worn/fouled spark plug (cylinder 8)
  • Faulty or clogged fuel injector for cylinder 8
  • Open/short in injector or coil wiring or poor connector/ground
  • Low compression or mechanical issue in cylinder 8 (valve, piston, head gasket)
  • Weak battery or poor starter performance causing inadequate cranking

Symptoms

  • Long or rough cranking on initial start
  • Engine misfires or runs rough immediately after start
  • Check Engine Light (MIL) illuminated or stored P1356 (and possibly P0308)
  • Poor startability or extended crank time
  • Strong fuel smell from exhaust during/after cranking
  • Possible increased crank noise or lack of power until engine clears misfire

What to check

  • Read all stored/active codes and freeze frame data; note other related codes (P0308, P0358, P0316, etc.)
  • View live data during crank and first seconds of run — crank RPM, misfire counters, fuel injection pulse widths, ignition dwell/coil status
  • Check battery voltage during cranking (should stay above ~9.5–10 V)
  • Inspect coil pack and spark plug on cylinder 8 for damage, corrosion, carbon tracking, or fouling
  • Swap coil 8 with another cylinder’s coil and re-crank to see if misfire follows the coil
  • Swap injector 8 with another cylinder’s injector (or use a noid light/ammeter) to test injector operation

Signal parameters

  • Crankshaft speed (RPM) during cranking
  • Cylinder-specific misfire counters and misfire index
  • Ignition coil primary/secondary voltage and dwell signal (cylinder 8)
  • Injector pulse width and injector electrical current (cylinder 8)
  • Battery voltage during start/crank
  • Fuel rail pressure during cranking

Diagnostic algorithm

  1. Retrieve codes and freeze-frame; note related codes (P0308, P0358, P0316, P0208, etc.).
  2. Inspect battery and starter performance; verify adequate cranking voltage. Low voltage can mimic misfire.
  3. Visually inspect coil pack, spark plug, and wiring for cylinder 8. Replace obvious damaged components.
  4. Swap cylinder 8 coil with a known-good coil from another cylinder and re-crank. If misfire moves to the other cylinder, replace the coil.
  5. If coil swap didn’t move the fault, swap or bench-test injector 8, or use a noid light/ammeter to confirm injector pulse and current. Listen for injector click.
  6. Backprobe coil primary and secondary with an oscilloscope or multimeter during cranking to confirm proper ignition waveform and sufficient spark energy.
  7. Perform a compression and/or leak-down test on cylinder 8 if ignition and fueling check good; low compression indicates mechanical failure.
  8. Inspect/repair any damaged wiring, poor grounds, or connector corrosion found at coil/injector/PCM harness. Repair and protect harness.
  9. Clear codes and repeat start/crank test. If intermittent, perform several cold/hot starts to confirm repair. If fault persists, consider PCM or sensor replacement after verifying wiring and components.
  10. If multiple cylinders show related issues, expand diagnosis to fuel rail, fuel pump, cam/crank sensors, and PCM as needed.

Likely causes

  • Defective ignition coil on cylinder 8
  • Bad or fouled spark plug in cylinder 8
  • Faulty fuel injector or wiring for cylinder 8
  • Intermittent connector or poor ground at cylinder 8 components
  • Low compression in cylinder 8 (ring, valve, head gasket)

Fault status

⚠️ Status
Misfire detected on cylinder 8 during engine start/crank (BMW P1356). MIL may be set. Repeated misfires can damage catalytic converter and increase emissions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

P0308 P0316 P0300 P0358 P0208 P0335
166

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LINCOLN

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Code

P1356

MERCURY P — Powertrain

Loss of Ignition Diagnostic Module Input to PCM

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

Causes

  • Faulty ignition coil for cylinder 8
  • Worn/fouled spark plug (cylinder 8)
  • Faulty or clogged fuel injector for cylinder 8
  • Open/short in injector or coil wiring or poor connector/ground
  • Low compression or mechanical issue in cylinder 8 (valve, piston, head gasket)
  • Weak battery or poor starter performance causing inadequate cranking

Symptoms

  • Long or rough cranking on initial start
  • Engine misfires or runs rough immediately after start
  • Check Engine Light (MIL) illuminated or stored P1356 (and possibly P0308)
  • Poor startability or extended crank time
  • Strong fuel smell from exhaust during/after cranking
  • Possible increased crank noise or lack of power until engine clears misfire

What to check

  • Read all stored/active codes and freeze frame data; note other related codes (P0308, P0358, P0316, etc.)
  • View live data during crank and first seconds of run — crank RPM, misfire counters, fuel injection pulse widths, ignition dwell/coil status
  • Check battery voltage during cranking (should stay above ~9.5–10 V)
  • Inspect coil pack and spark plug on cylinder 8 for damage, corrosion, carbon tracking, or fouling
  • Swap coil 8 with another cylinder’s coil and re-crank to see if misfire follows the coil
  • Swap injector 8 with another cylinder’s injector (or use a noid light/ammeter) to test injector operation

Signal parameters

  • Crankshaft speed (RPM) during cranking
  • Cylinder-specific misfire counters and misfire index
  • Ignition coil primary/secondary voltage and dwell signal (cylinder 8)
  • Injector pulse width and injector electrical current (cylinder 8)
  • Battery voltage during start/crank
  • Fuel rail pressure during cranking

Diagnostic algorithm

  1. Retrieve codes and freeze-frame; note related codes (P0308, P0358, P0316, P0208, etc.).
  2. Inspect battery and starter performance; verify adequate cranking voltage. Low voltage can mimic misfire.
  3. Visually inspect coil pack, spark plug, and wiring for cylinder 8. Replace obvious damaged components.
  4. Swap cylinder 8 coil with a known-good coil from another cylinder and re-crank. If misfire moves to the other cylinder, replace the coil.
  5. If coil swap didn’t move the fault, swap or bench-test injector 8, or use a noid light/ammeter to confirm injector pulse and current. Listen for injector click.
  6. Backprobe coil primary and secondary with an oscilloscope or multimeter during cranking to confirm proper ignition waveform and sufficient spark energy.
  7. Perform a compression and/or leak-down test on cylinder 8 if ignition and fueling check good; low compression indicates mechanical failure.
  8. Inspect/repair any damaged wiring, poor grounds, or connector corrosion found at coil/injector/PCM harness. Repair and protect harness.
  9. Clear codes and repeat start/crank test. If intermittent, perform several cold/hot starts to confirm repair. If fault persists, consider PCM or sensor replacement after verifying wiring and components.
  10. If multiple cylinders show related issues, expand diagnosis to fuel rail, fuel pump, cam/crank sensors, and PCM as needed.

Likely causes

  • Defective ignition coil on cylinder 8
  • Bad or fouled spark plug in cylinder 8
  • Faulty fuel injector or wiring for cylinder 8
  • Intermittent connector or poor ground at cylinder 8 components
  • Low compression in cylinder 8 (ring, valve, head gasket)

Fault status

⚠️ Status
Misfire detected on cylinder 8 during engine start/crank (BMW P1356). MIL may be set. Repeated misfires can damage catalytic converter and increase emissions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

P0308 P0316 P0300 P0358 P0208 P0335
296

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MERCURY

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Code

P1356

OLDSMOBILE P — Powertrain

IC Output High Pulse Detected When Grounded Cyl 6

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

Causes

  • Faulty ignition coil for cylinder 8
  • Worn/fouled spark plug (cylinder 8)
  • Faulty or clogged fuel injector for cylinder 8
  • Open/short in injector or coil wiring or poor connector/ground
  • Low compression or mechanical issue in cylinder 8 (valve, piston, head gasket)
  • Weak battery or poor starter performance causing inadequate cranking

Symptoms

  • Long or rough cranking on initial start
  • Engine misfires or runs rough immediately after start
  • Check Engine Light (MIL) illuminated or stored P1356 (and possibly P0308)
  • Poor startability or extended crank time
  • Strong fuel smell from exhaust during/after cranking
  • Possible increased crank noise or lack of power until engine clears misfire

What to check

  • Read all stored/active codes and freeze frame data; note other related codes (P0308, P0358, P0316, etc.)
  • View live data during crank and first seconds of run — crank RPM, misfire counters, fuel injection pulse widths, ignition dwell/coil status
  • Check battery voltage during cranking (should stay above ~9.5–10 V)
  • Inspect coil pack and spark plug on cylinder 8 for damage, corrosion, carbon tracking, or fouling
  • Swap coil 8 with another cylinder’s coil and re-crank to see if misfire follows the coil
  • Swap injector 8 with another cylinder’s injector (or use a noid light/ammeter) to test injector operation

Signal parameters

  • Crankshaft speed (RPM) during cranking
  • Cylinder-specific misfire counters and misfire index
  • Ignition coil primary/secondary voltage and dwell signal (cylinder 8)
  • Injector pulse width and injector electrical current (cylinder 8)
  • Battery voltage during start/crank
  • Fuel rail pressure during cranking

Diagnostic algorithm

  1. Retrieve codes and freeze-frame; note related codes (P0308, P0358, P0316, P0208, etc.).
  2. Inspect battery and starter performance; verify adequate cranking voltage. Low voltage can mimic misfire.
  3. Visually inspect coil pack, spark plug, and wiring for cylinder 8. Replace obvious damaged components.
  4. Swap cylinder 8 coil with a known-good coil from another cylinder and re-crank. If misfire moves to the other cylinder, replace the coil.
  5. If coil swap didn’t move the fault, swap or bench-test injector 8, or use a noid light/ammeter to confirm injector pulse and current. Listen for injector click.
  6. Backprobe coil primary and secondary with an oscilloscope or multimeter during cranking to confirm proper ignition waveform and sufficient spark energy.
  7. Perform a compression and/or leak-down test on cylinder 8 if ignition and fueling check good; low compression indicates mechanical failure.
  8. Inspect/repair any damaged wiring, poor grounds, or connector corrosion found at coil/injector/PCM harness. Repair and protect harness.
  9. Clear codes and repeat start/crank test. If intermittent, perform several cold/hot starts to confirm repair. If fault persists, consider PCM or sensor replacement after verifying wiring and components.
  10. If multiple cylinders show related issues, expand diagnosis to fuel rail, fuel pump, cam/crank sensors, and PCM as needed.

Likely causes

  • Defective ignition coil on cylinder 8
  • Bad or fouled spark plug in cylinder 8
  • Faulty fuel injector or wiring for cylinder 8
  • Intermittent connector or poor ground at cylinder 8 components
  • Low compression in cylinder 8 (ring, valve, head gasket)

Fault status

⚠️ Status
Misfire detected on cylinder 8 during engine start/crank (BMW P1356). MIL may be set. Repeated misfires can damage catalytic converter and increase emissions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

P0308 P0316 P0300 P0358 P0208 P0335
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P1356

SATURN P — Powertrain

IC Output High Pulse Detected When Grounded Cyl.6

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

Causes

  • Faulty ignition coil for cylinder 8
  • Worn/fouled spark plug (cylinder 8)
  • Faulty or clogged fuel injector for cylinder 8
  • Open/short in injector or coil wiring or poor connector/ground
  • Low compression or mechanical issue in cylinder 8 (valve, piston, head gasket)
  • Weak battery or poor starter performance causing inadequate cranking

Symptoms

  • Long or rough cranking on initial start
  • Engine misfires or runs rough immediately after start
  • Check Engine Light (MIL) illuminated or stored P1356 (and possibly P0308)
  • Poor startability or extended crank time
  • Strong fuel smell from exhaust during/after cranking
  • Possible increased crank noise or lack of power until engine clears misfire

What to check

  • Read all stored/active codes and freeze frame data; note other related codes (P0308, P0358, P0316, etc.)
  • View live data during crank and first seconds of run — crank RPM, misfire counters, fuel injection pulse widths, ignition dwell/coil status
  • Check battery voltage during cranking (should stay above ~9.5–10 V)
  • Inspect coil pack and spark plug on cylinder 8 for damage, corrosion, carbon tracking, or fouling
  • Swap coil 8 with another cylinder’s coil and re-crank to see if misfire follows the coil
  • Swap injector 8 with another cylinder’s injector (or use a noid light/ammeter) to test injector operation

Signal parameters

  • Crankshaft speed (RPM) during cranking
  • Cylinder-specific misfire counters and misfire index
  • Ignition coil primary/secondary voltage and dwell signal (cylinder 8)
  • Injector pulse width and injector electrical current (cylinder 8)
  • Battery voltage during start/crank
  • Fuel rail pressure during cranking

Diagnostic algorithm

  1. Retrieve codes and freeze-frame; note related codes (P0308, P0358, P0316, P0208, etc.).
  2. Inspect battery and starter performance; verify adequate cranking voltage. Low voltage can mimic misfire.
  3. Visually inspect coil pack, spark plug, and wiring for cylinder 8. Replace obvious damaged components.
  4. Swap cylinder 8 coil with a known-good coil from another cylinder and re-crank. If misfire moves to the other cylinder, replace the coil.
  5. If coil swap didn’t move the fault, swap or bench-test injector 8, or use a noid light/ammeter to confirm injector pulse and current. Listen for injector click.
  6. Backprobe coil primary and secondary with an oscilloscope or multimeter during cranking to confirm proper ignition waveform and sufficient spark energy.
  7. Perform a compression and/or leak-down test on cylinder 8 if ignition and fueling check good; low compression indicates mechanical failure.
  8. Inspect/repair any damaged wiring, poor grounds, or connector corrosion found at coil/injector/PCM harness. Repair and protect harness.
  9. Clear codes and repeat start/crank test. If intermittent, perform several cold/hot starts to confirm repair. If fault persists, consider PCM or sensor replacement after verifying wiring and components.
  10. If multiple cylinders show related issues, expand diagnosis to fuel rail, fuel pump, cam/crank sensors, and PCM as needed.

Likely causes

  • Defective ignition coil on cylinder 8
  • Bad or fouled spark plug in cylinder 8
  • Faulty fuel injector or wiring for cylinder 8
  • Intermittent connector or poor ground at cylinder 8 components
  • Low compression in cylinder 8 (ring, valve, head gasket)

Fault status

⚠️ Status
Misfire detected on cylinder 8 during engine start/crank (BMW P1356). MIL may be set. Repeated misfires can damage catalytic converter and increase emissions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

P0308 P0316 P0300 P0358 P0208 P0335
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P1356

VOLKSWAGEN P — Powertrain

Cylinder 1 Ignition Circuit Short To B+

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

Causes

  • Faulty ignition coil for cylinder 8
  • Worn/fouled spark plug (cylinder 8)
  • Faulty or clogged fuel injector for cylinder 8
  • Open/short in injector or coil wiring or poor connector/ground
  • Low compression or mechanical issue in cylinder 8 (valve, piston, head gasket)
  • Weak battery or poor starter performance causing inadequate cranking

Symptoms

  • Long or rough cranking on initial start
  • Engine misfires or runs rough immediately after start
  • Check Engine Light (MIL) illuminated or stored P1356 (and possibly P0308)
  • Poor startability or extended crank time
  • Strong fuel smell from exhaust during/after cranking
  • Possible increased crank noise or lack of power until engine clears misfire

What to check

  • Read all stored/active codes and freeze frame data; note other related codes (P0308, P0358, P0316, etc.)
  • View live data during crank and first seconds of run — crank RPM, misfire counters, fuel injection pulse widths, ignition dwell/coil status
  • Check battery voltage during cranking (should stay above ~9.5–10 V)
  • Inspect coil pack and spark plug on cylinder 8 for damage, corrosion, carbon tracking, or fouling
  • Swap coil 8 with another cylinder’s coil and re-crank to see if misfire follows the coil
  • Swap injector 8 with another cylinder’s injector (or use a noid light/ammeter) to test injector operation

Signal parameters

  • Crankshaft speed (RPM) during cranking
  • Cylinder-specific misfire counters and misfire index
  • Ignition coil primary/secondary voltage and dwell signal (cylinder 8)
  • Injector pulse width and injector electrical current (cylinder 8)
  • Battery voltage during start/crank
  • Fuel rail pressure during cranking

Diagnostic algorithm

  1. Retrieve codes and freeze-frame; note related codes (P0308, P0358, P0316, P0208, etc.).
  2. Inspect battery and starter performance; verify adequate cranking voltage. Low voltage can mimic misfire.
  3. Visually inspect coil pack, spark plug, and wiring for cylinder 8. Replace obvious damaged components.
  4. Swap cylinder 8 coil with a known-good coil from another cylinder and re-crank. If misfire moves to the other cylinder, replace the coil.
  5. If coil swap didn’t move the fault, swap or bench-test injector 8, or use a noid light/ammeter to confirm injector pulse and current. Listen for injector click.
  6. Backprobe coil primary and secondary with an oscilloscope or multimeter during cranking to confirm proper ignition waveform and sufficient spark energy.
  7. Perform a compression and/or leak-down test on cylinder 8 if ignition and fueling check good; low compression indicates mechanical failure.
  8. Inspect/repair any damaged wiring, poor grounds, or connector corrosion found at coil/injector/PCM harness. Repair and protect harness.
  9. Clear codes and repeat start/crank test. If intermittent, perform several cold/hot starts to confirm repair. If fault persists, consider PCM or sensor replacement after verifying wiring and components.
  10. If multiple cylinders show related issues, expand diagnosis to fuel rail, fuel pump, cam/crank sensors, and PCM as needed.

Likely causes

  • Defective ignition coil on cylinder 8
  • Bad or fouled spark plug in cylinder 8
  • Faulty fuel injector or wiring for cylinder 8
  • Intermittent connector or poor ground at cylinder 8 components
  • Low compression in cylinder 8 (ring, valve, head gasket)

Fault status

⚠️ Status
Misfire detected on cylinder 8 during engine start/crank (BMW P1356). MIL may be set. Repeated misfires can damage catalytic converter and increase emissions.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

P0308 P0316 P0300 P0358 P0208 P0335
626

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