Code
P0359
Generic
P — Powertrain
Ignition Coil I Primary Control Circuit/Open
Views:
UK: 16
EN: 31
RU: 23
AI status
Completed
Completed
100%
Causes
- Broken or disconnected wiring in coil I primary circuit
- Poor or corroded connector at the ignition coil or ECM/PCM
- Faulty ignition coil (primary winding open or internal failure)
- Short to ground or short to battery in primary circuit
- Faulty ECM/PCM driver for coil I
- Water intrusion, oil contamination, or heat damage to coil or harness
Symptoms
- Check Engine Light illuminated (MIL) with stored P0359
- Engine misfire on cylinder I or rough idle
- Hard starting or no start in severe cases
- Reduced engine power and acceleration
- Increased fuel consumption or emissions
- Intermittent misfire or stumble that may change with vibration or temperature
What to check
- Retrieve freeze frame and supporting codes; note misfire codes (P0301 etc.) and which cylinder is affected
- Visually inspect coil I, connector, and wiring for damage, corrosion, pin push-out, oil or water ingress
- Check battery voltage at ignition coil connector (key ON) — should be ~11–14 V on supply terminal
- Measure coil I primary resistance with coil removed (compare to specification)
- Backprobe control wire while cranking/idle with scan tool or multimeter to confirm switching signal from ECM
- Wiggle test wiring with engine running or while monitoring to reproduce fault (use caution)
Signal parameters
- Ignition coil primary resistance (typical): ~0.4–2.0 ohms (varies by coil design)
- Ignition coil secondary resistance (typical): ~5,000–15,000 ohms (for reference)
- Supply voltage at coil supply terminal: ~11–14 V with ignition ON
- Control signal: ECM switches primary to ground or to battery (depending on system). Expect pulsed switching during cranking/running; duty cycle and frequency increase with RPM
- Open-circuit indication: infinite/OL on primary resistance or no switching pulse when commanded
- Short-to-ground indication: near 0 ohms between control wire and chassis ground
Diagnostic algorithm
- Read and record DTCs, freeze frame, and pending codes. Note any misfire codes (P0301 etc.) linked to cylinder I.
- Perform a visual inspection of coil I, connector, and wiring harness for damage, corrosion, oil/water contamination, or loose pins.
- With ignition OFF remove coil and measure primary resistance across coil primary terminals; compare to manufacturer spec. If open, replace coil.
- With ignition ON, measure battery voltage at the coil supply terminal. If low or missing, trace supply fuse/relay and wiring.
- Backprobe the coil control (driver) wire with a scope or multimeter while cranking/idle to confirm the ECM is commanding the coil (look for pulses or switching to ground).
- If no command is present but wiring is intact, check continuity between ECM driver pin and coil connector. Repair any open circuits or shorts.
- If command pulses are present at the ECM pin but not at the coil connector, find and repair wiring fault between ECM and coil.
- Perform a wiggle test on harness/connectors while monitoring live data or waveforms to reproduce intermittent faults.
- Swap coil I with a known-good coil from another cylinder (if identical) and clear codes. If the DTC or misfire moves to the other cylinder, replace the coil.
- If wiring and coil test good and the control signal is absent or incorrect at the ECM connector, consider ECM driver failure; verify ECM grounds and power, then replace ECM only after all wiring and coil possibilities are exhausted.
- After repair, clear codes and road test under conditions that previously set the code; verify no return of DTC and correct engine operation.
Likely causes
- Open primary winding inside ignition coil I
- Damaged harness between ECM and coil I (broken wire, chafing)
- Corroded/bent pin or poor pin contact at coil connector
- Short to ground on the coil control wire due to insulation damage
- ECM output transistor failed for that coil circuit
Fault status
Status
P0359 — Ignition Coil I Primary Control Circuit/Open: control circuit for coil I open or fault detected. Check coil, wiring, connectors, and ECM driver.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P0359
GWM
P — Powertrain
- Malfunction in primary / secondary circuit of ignition coil I
Views:
UK: 0
EN: 6
RU: 2
AI status
Completed
Completed
100%
Causes
- Broken or disconnected wiring in coil I primary circuit
- Poor or corroded connector at the ignition coil or ECM/PCM
- Faulty ignition coil (primary winding open or internal failure)
- Short to ground or short to battery in primary circuit
- Faulty ECM/PCM driver for coil I
- Water intrusion, oil contamination, or heat damage to coil or harness
Symptoms
- Check Engine Light illuminated (MIL) with stored P0359
- Engine misfire on cylinder I or rough idle
- Hard starting or no start in severe cases
- Reduced engine power and acceleration
- Increased fuel consumption or emissions
- Intermittent misfire or stumble that may change with vibration or temperature
What to check
- Retrieve freeze frame and supporting codes; note misfire codes (P0301 etc.) and which cylinder is affected
- Visually inspect coil I, connector, and wiring for damage, corrosion, pin push-out, oil or water ingress
- Check battery voltage at ignition coil connector (key ON) — should be ~11–14 V on supply terminal
- Measure coil I primary resistance with coil removed (compare to specification)
- Backprobe control wire while cranking/idle with scan tool or multimeter to confirm switching signal from ECM
- Wiggle test wiring with engine running or while monitoring to reproduce fault (use caution)
Signal parameters
- Ignition coil primary resistance (typical): ~0.4–2.0 ohms (varies by coil design)
- Ignition coil secondary resistance (typical): ~5,000–15,000 ohms (for reference)
- Supply voltage at coil supply terminal: ~11–14 V with ignition ON
- Control signal: ECM switches primary to ground or to battery (depending on system). Expect pulsed switching during cranking/running; duty cycle and frequency increase with RPM
- Open-circuit indication: infinite/OL on primary resistance or no switching pulse when commanded
- Short-to-ground indication: near 0 ohms between control wire and chassis ground
Diagnostic algorithm
- Read and record DTCs, freeze frame, and pending codes. Note any misfire codes (P0301 etc.) linked to cylinder I.
- Perform a visual inspection of coil I, connector, and wiring harness for damage, corrosion, oil/water contamination, or loose pins.
- With ignition OFF remove coil and measure primary resistance across coil primary terminals; compare to manufacturer spec. If open, replace coil.
- With ignition ON, measure battery voltage at the coil supply terminal. If low or missing, trace supply fuse/relay and wiring.
- Backprobe the coil control (driver) wire with a scope or multimeter while cranking/idle to confirm the ECM is commanding the coil (look for pulses or switching to ground).
- If no command is present but wiring is intact, check continuity between ECM driver pin and coil connector. Repair any open circuits or shorts.
- If command pulses are present at the ECM pin but not at the coil connector, find and repair wiring fault between ECM and coil.
- Perform a wiggle test on harness/connectors while monitoring live data or waveforms to reproduce intermittent faults.
- Swap coil I with a known-good coil from another cylinder (if identical) and clear codes. If the DTC or misfire moves to the other cylinder, replace the coil.
- If wiring and coil test good and the control signal is absent or incorrect at the ECM connector, consider ECM driver failure; verify ECM grounds and power, then replace ECM only after all wiring and coil possibilities are exhausted.
- After repair, clear codes and road test under conditions that previously set the code; verify no return of DTC and correct engine operation.
Likely causes
- Open primary winding inside ignition coil I
- Damaged harness between ECM and coil I (broken wire, chafing)
- Corroded/bent pin or poor pin contact at coil connector
- Short to ground on the coil control wire due to insulation damage
- ECM output transistor failed for that coil circuit
Fault status
Status
P0359 — Ignition Coil I Primary Control Circuit/Open: control circuit for coil I open or fault detected. Check coil, wiring, connectors, and ECM driver.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P0359
HUMMER
P — Powertrain
Ignition Coil I Primary/Secondary Circuit Malfunction
Views:
UK: 8
EN: 19
RU: 13
AI status
Completed
Completed
100%
Causes
- Broken or disconnected wiring in coil I primary circuit
- Poor or corroded connector at the ignition coil or ECM/PCM
- Faulty ignition coil (primary winding open or internal failure)
- Short to ground or short to battery in primary circuit
- Faulty ECM/PCM driver for coil I
- Water intrusion, oil contamination, or heat damage to coil or harness
Symptoms
- Check Engine Light illuminated (MIL) with stored P0359
- Engine misfire on cylinder I or rough idle
- Hard starting or no start in severe cases
- Reduced engine power and acceleration
- Increased fuel consumption or emissions
- Intermittent misfire or stumble that may change with vibration or temperature
What to check
- Retrieve freeze frame and supporting codes; note misfire codes (P0301 etc.) and which cylinder is affected
- Visually inspect coil I, connector, and wiring for damage, corrosion, pin push-out, oil or water ingress
- Check battery voltage at ignition coil connector (key ON) — should be ~11–14 V on supply terminal
- Measure coil I primary resistance with coil removed (compare to specification)
- Backprobe control wire while cranking/idle with scan tool or multimeter to confirm switching signal from ECM
- Wiggle test wiring with engine running or while monitoring to reproduce fault (use caution)
Signal parameters
- Ignition coil primary resistance (typical): ~0.4–2.0 ohms (varies by coil design)
- Ignition coil secondary resistance (typical): ~5,000–15,000 ohms (for reference)
- Supply voltage at coil supply terminal: ~11–14 V with ignition ON
- Control signal: ECM switches primary to ground or to battery (depending on system). Expect pulsed switching during cranking/running; duty cycle and frequency increase with RPM
- Open-circuit indication: infinite/OL on primary resistance or no switching pulse when commanded
- Short-to-ground indication: near 0 ohms between control wire and chassis ground
Diagnostic algorithm
- Read and record DTCs, freeze frame, and pending codes. Note any misfire codes (P0301 etc.) linked to cylinder I.
- Perform a visual inspection of coil I, connector, and wiring harness for damage, corrosion, oil/water contamination, or loose pins.
- With ignition OFF remove coil and measure primary resistance across coil primary terminals; compare to manufacturer spec. If open, replace coil.
- With ignition ON, measure battery voltage at the coil supply terminal. If low or missing, trace supply fuse/relay and wiring.
- Backprobe the coil control (driver) wire with a scope or multimeter while cranking/idle to confirm the ECM is commanding the coil (look for pulses or switching to ground).
- If no command is present but wiring is intact, check continuity between ECM driver pin and coil connector. Repair any open circuits or shorts.
- If command pulses are present at the ECM pin but not at the coil connector, find and repair wiring fault between ECM and coil.
- Perform a wiggle test on harness/connectors while monitoring live data or waveforms to reproduce intermittent faults.
- Swap coil I with a known-good coil from another cylinder (if identical) and clear codes. If the DTC or misfire moves to the other cylinder, replace the coil.
- If wiring and coil test good and the control signal is absent or incorrect at the ECM connector, consider ECM driver failure; verify ECM grounds and power, then replace ECM only after all wiring and coil possibilities are exhausted.
- After repair, clear codes and road test under conditions that previously set the code; verify no return of DTC and correct engine operation.
Likely causes
- Open primary winding inside ignition coil I
- Damaged harness between ECM and coil I (broken wire, chafing)
- Corroded/bent pin or poor pin contact at coil connector
- Short to ground on the coil control wire due to insulation damage
- ECM output transistor failed for that coil circuit
Fault status
Status
P0359 — Ignition Coil I Primary Control Circuit/Open: control circuit for coil I open or fault detected. Check coil, wiring, connectors, and ECM driver.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email