Code
P0206
Generic
P — Powertrain
Cylinder 6 Injector A Circuit
Views:
UK: 28
EN: 34
RU: 36
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring between ECM and cylinder 6 injector
- Poor or corroded connector at the injector or ECM
- Failed or stuck injector (electrical or mechanical)
- Blown fuse or faulty power feed/relay to injectors
- Faulty ECM/PCM injector driver circuit
- Aftermarket parts or recent repairs with incorrect wiring
Symptoms
- Check Engine Light (MIL) illuminated
- Rough idle or misfire localized to cylinder 6
- Reduced engine power, hesitation or stumbling under load
- Poor fuel economy and increased emissions
- Possible hard starting or stumble during acceleration
What to check
- Retrieve trouble codes and freeze frame data with a scan tool; note freeze frame and readiness
- Visually inspect injector harness, connector, and pins at cylinder 6 for corrosion, damage or oil intrusion
- Check for any blown fuses or failed injector relay that supplies fuel injectors
- Backprobe injector connector with key ON to confirm reference voltage/power is present
- Measure injector coil resistance and compare to manufacturer spec
- Use a noid light or scan tool to confirm injector is being pulsed when commanded
Signal parameters
- Typical injector coil resistance: high-impedance 12–16 Ω, low-impedance 2–5 Ω (check OEM spec for exact value)
- Reference supply: battery voltage (~B+) present at injector power pin with key ON
- Driver output: ECM switches injector to ground; voltage at driver pin should drop near 0 V when commanded
- Pulse width: typical 1–5 ms at idle; varies with load and RPM (scan tool will show pulse width)
- Duty cycle: low at idle, increases with load; near 100% only at high demand
- Oscilloscope waveform: sharp ground-side switching edges; look for missing pulses, shorted waveform, or noisy signal
Diagnostic algorithm
- Confirm code and record freeze frame data. Clear codes and attempt to reproduce.
- Perform a visual inspection of wiring and connectors at cylinder 6 injector and ECM for obvious damage, corrosion or oil intrusion.
- With ignition OFF, unplug the injector connector and inspect pins; check for bent or pushed-out terminals.
- Measure injector coil resistance at the injector pins; compare to OEM spec. Replace injector if open or out-of-spec.
- With key ON (engine OFF) backprobe the connector to verify battery voltage on the power feed circuit. If no voltage, check fuse/relay/power distribution.
- Command the injector ON using a scan tool while monitoring the connector with a noid light or oscilloscope to confirm pulsing and waveform shape.
- While commanding the injector, measure voltage at the driver pin; it should switch to near ground when energized. If it stays at battery, suspect driver open; if stuck at ground, suspect short to ground.
- Check continuity between the injector connector and the ECM injector driver pin; inspect for short to battery or ground and for high resistance/opens.
- Swap the suspect injector with a known good injector of the same type. If the code or misfire follows the injector, replace the injector.
- If wiring and injector test good but code persists, inspect ECM connector and grounds. Repair damaged wiring or connector terminals as needed.
- As a last step, if all wiring and injector tests are good and fault remains, consider ECM/PCM driver failure and consult manufacturer procedures for ECM testing/replacement.
Likely causes
- Damaged connector or wiring (broken wire, pin corrosion, rodent damage)
- Injector shorted internally or open (failed injector coil)
- Poor pin contact at injector harness connector
- Injector fuse/relay or shared power feed open
- ECM driver fault (less common) or PCM software/firmware issue
Fault status
Status
P0206 - Cylinder 6 Injector A Circuit: ECM detected abnormal electrical condition (open, short, excessive/insufficient current or voltage) in the injector circuit for cylinder 6.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P0206
GWM
P — Powertrain
- Injector malfunction - cylinder 6
Views:
UK: 15
EN: 17
RU: 14
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring between ECM and cylinder 6 injector
- Poor or corroded connector at the injector or ECM
- Failed or stuck injector (electrical or mechanical)
- Blown fuse or faulty power feed/relay to injectors
- Faulty ECM/PCM injector driver circuit
- Aftermarket parts or recent repairs with incorrect wiring
Symptoms
- Check Engine Light (MIL) illuminated
- Rough idle or misfire localized to cylinder 6
- Reduced engine power, hesitation or stumbling under load
- Poor fuel economy and increased emissions
- Possible hard starting or stumble during acceleration
What to check
- Retrieve trouble codes and freeze frame data with a scan tool; note freeze frame and readiness
- Visually inspect injector harness, connector, and pins at cylinder 6 for corrosion, damage or oil intrusion
- Check for any blown fuses or failed injector relay that supplies fuel injectors
- Backprobe injector connector with key ON to confirm reference voltage/power is present
- Measure injector coil resistance and compare to manufacturer spec
- Use a noid light or scan tool to confirm injector is being pulsed when commanded
Signal parameters
- Typical injector coil resistance: high-impedance 12–16 Ω, low-impedance 2–5 Ω (check OEM spec for exact value)
- Reference supply: battery voltage (~B+) present at injector power pin with key ON
- Driver output: ECM switches injector to ground; voltage at driver pin should drop near 0 V when commanded
- Pulse width: typical 1–5 ms at idle; varies with load and RPM (scan tool will show pulse width)
- Duty cycle: low at idle, increases with load; near 100% only at high demand
- Oscilloscope waveform: sharp ground-side switching edges; look for missing pulses, shorted waveform, or noisy signal
Diagnostic algorithm
- Confirm code and record freeze frame data. Clear codes and attempt to reproduce.
- Perform a visual inspection of wiring and connectors at cylinder 6 injector and ECM for obvious damage, corrosion or oil intrusion.
- With ignition OFF, unplug the injector connector and inspect pins; check for bent or pushed-out terminals.
- Measure injector coil resistance at the injector pins; compare to OEM spec. Replace injector if open or out-of-spec.
- With key ON (engine OFF) backprobe the connector to verify battery voltage on the power feed circuit. If no voltage, check fuse/relay/power distribution.
- Command the injector ON using a scan tool while monitoring the connector with a noid light or oscilloscope to confirm pulsing and waveform shape.
- While commanding the injector, measure voltage at the driver pin; it should switch to near ground when energized. If it stays at battery, suspect driver open; if stuck at ground, suspect short to ground.
- Check continuity between the injector connector and the ECM injector driver pin; inspect for short to battery or ground and for high resistance/opens.
- Swap the suspect injector with a known good injector of the same type. If the code or misfire follows the injector, replace the injector.
- If wiring and injector test good but code persists, inspect ECM connector and grounds. Repair damaged wiring or connector terminals as needed.
- As a last step, if all wiring and injector tests are good and fault remains, consider ECM/PCM driver failure and consult manufacturer procedures for ECM testing/replacement.
Likely causes
- Damaged connector or wiring (broken wire, pin corrosion, rodent damage)
- Injector shorted internally or open (failed injector coil)
- Poor pin contact at injector harness connector
- Injector fuse/relay or shared power feed open
- ECM driver fault (less common) or PCM software/firmware issue
Fault status
Status
P0206 - Cylinder 6 Injector A Circuit: ECM detected abnormal electrical condition (open, short, excessive/insufficient current or voltage) in the injector circuit for cylinder 6.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P0206
HUMMER
P — Powertrain
Injector 6 Control Circuit
Views:
UK: 13
EN: 16
RU: 22
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring between ECM and cylinder 6 injector
- Poor or corroded connector at the injector or ECM
- Failed or stuck injector (electrical or mechanical)
- Blown fuse or faulty power feed/relay to injectors
- Faulty ECM/PCM injector driver circuit
- Aftermarket parts or recent repairs with incorrect wiring
Symptoms
- Check Engine Light (MIL) illuminated
- Rough idle or misfire localized to cylinder 6
- Reduced engine power, hesitation or stumbling under load
- Poor fuel economy and increased emissions
- Possible hard starting or stumble during acceleration
What to check
- Retrieve trouble codes and freeze frame data with a scan tool; note freeze frame and readiness
- Visually inspect injector harness, connector, and pins at cylinder 6 for corrosion, damage or oil intrusion
- Check for any blown fuses or failed injector relay that supplies fuel injectors
- Backprobe injector connector with key ON to confirm reference voltage/power is present
- Measure injector coil resistance and compare to manufacturer spec
- Use a noid light or scan tool to confirm injector is being pulsed when commanded
Signal parameters
- Typical injector coil resistance: high-impedance 12–16 Ω, low-impedance 2–5 Ω (check OEM spec for exact value)
- Reference supply: battery voltage (~B+) present at injector power pin with key ON
- Driver output: ECM switches injector to ground; voltage at driver pin should drop near 0 V when commanded
- Pulse width: typical 1–5 ms at idle; varies with load and RPM (scan tool will show pulse width)
- Duty cycle: low at idle, increases with load; near 100% only at high demand
- Oscilloscope waveform: sharp ground-side switching edges; look for missing pulses, shorted waveform, or noisy signal
Diagnostic algorithm
- Confirm code and record freeze frame data. Clear codes and attempt to reproduce.
- Perform a visual inspection of wiring and connectors at cylinder 6 injector and ECM for obvious damage, corrosion or oil intrusion.
- With ignition OFF, unplug the injector connector and inspect pins; check for bent or pushed-out terminals.
- Measure injector coil resistance at the injector pins; compare to OEM spec. Replace injector if open or out-of-spec.
- With key ON (engine OFF) backprobe the connector to verify battery voltage on the power feed circuit. If no voltage, check fuse/relay/power distribution.
- Command the injector ON using a scan tool while monitoring the connector with a noid light or oscilloscope to confirm pulsing and waveform shape.
- While commanding the injector, measure voltage at the driver pin; it should switch to near ground when energized. If it stays at battery, suspect driver open; if stuck at ground, suspect short to ground.
- Check continuity between the injector connector and the ECM injector driver pin; inspect for short to battery or ground and for high resistance/opens.
- Swap the suspect injector with a known good injector of the same type. If the code or misfire follows the injector, replace the injector.
- If wiring and injector test good but code persists, inspect ECM connector and grounds. Repair damaged wiring or connector terminals as needed.
- As a last step, if all wiring and injector tests are good and fault remains, consider ECM/PCM driver failure and consult manufacturer procedures for ECM testing/replacement.
Likely causes
- Damaged connector or wiring (broken wire, pin corrosion, rodent damage)
- Injector shorted internally or open (failed injector coil)
- Poor pin contact at injector harness connector
- Injector fuse/relay or shared power feed open
- ECM driver fault (less common) or PCM software/firmware issue
Fault status
Status
P0206 - Cylinder 6 Injector A Circuit: ECM detected abnormal electrical condition (open, short, excessive/insufficient current or voltage) in the injector circuit for cylinder 6.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P0206
ISUZU
P — Powertrain
Injector Circuit - Cylinder 6
Views:
UK: 21
EN: 25
RU: 26
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring between ECM and cylinder 6 injector
- Poor or corroded connector at the injector or ECM
- Failed or stuck injector (electrical or mechanical)
- Blown fuse or faulty power feed/relay to injectors
- Faulty ECM/PCM injector driver circuit
- Aftermarket parts or recent repairs with incorrect wiring
Symptoms
- Check Engine Light (MIL) illuminated
- Rough idle or misfire localized to cylinder 6
- Reduced engine power, hesitation or stumbling under load
- Poor fuel economy and increased emissions
- Possible hard starting or stumble during acceleration
What to check
- Retrieve trouble codes and freeze frame data with a scan tool; note freeze frame and readiness
- Visually inspect injector harness, connector, and pins at cylinder 6 for corrosion, damage or oil intrusion
- Check for any blown fuses or failed injector relay that supplies fuel injectors
- Backprobe injector connector with key ON to confirm reference voltage/power is present
- Measure injector coil resistance and compare to manufacturer spec
- Use a noid light or scan tool to confirm injector is being pulsed when commanded
Signal parameters
- Typical injector coil resistance: high-impedance 12–16 Ω, low-impedance 2–5 Ω (check OEM spec for exact value)
- Reference supply: battery voltage (~B+) present at injector power pin with key ON
- Driver output: ECM switches injector to ground; voltage at driver pin should drop near 0 V when commanded
- Pulse width: typical 1–5 ms at idle; varies with load and RPM (scan tool will show pulse width)
- Duty cycle: low at idle, increases with load; near 100% only at high demand
- Oscilloscope waveform: sharp ground-side switching edges; look for missing pulses, shorted waveform, or noisy signal
Diagnostic algorithm
- Confirm code and record freeze frame data. Clear codes and attempt to reproduce.
- Perform a visual inspection of wiring and connectors at cylinder 6 injector and ECM for obvious damage, corrosion or oil intrusion.
- With ignition OFF, unplug the injector connector and inspect pins; check for bent or pushed-out terminals.
- Measure injector coil resistance at the injector pins; compare to OEM spec. Replace injector if open or out-of-spec.
- With key ON (engine OFF) backprobe the connector to verify battery voltage on the power feed circuit. If no voltage, check fuse/relay/power distribution.
- Command the injector ON using a scan tool while monitoring the connector with a noid light or oscilloscope to confirm pulsing and waveform shape.
- While commanding the injector, measure voltage at the driver pin; it should switch to near ground when energized. If it stays at battery, suspect driver open; if stuck at ground, suspect short to ground.
- Check continuity between the injector connector and the ECM injector driver pin; inspect for short to battery or ground and for high resistance/opens.
- Swap the suspect injector with a known good injector of the same type. If the code or misfire follows the injector, replace the injector.
- If wiring and injector test good but code persists, inspect ECM connector and grounds. Repair damaged wiring or connector terminals as needed.
- As a last step, if all wiring and injector tests are good and fault remains, consider ECM/PCM driver failure and consult manufacturer procedures for ECM testing/replacement.
Likely causes
- Damaged connector or wiring (broken wire, pin corrosion, rodent damage)
- Injector shorted internally or open (failed injector coil)
- Poor pin contact at injector harness connector
- Injector fuse/relay or shared power feed open
- ECM driver fault (less common) or PCM software/firmware issue
Fault status
Status
P0206 - Cylinder 6 Injector A Circuit: ECM detected abnormal electrical condition (open, short, excessive/insufficient current or voltage) in the injector circuit for cylinder 6.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P0206
LAND ROVER
P — Powertrain
Cylinder with injector circuit fault 6
Views:
UK: 10
EN: 16
RU: 20
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring between ECM and cylinder 6 injector
- Poor or corroded connector at the injector or ECM
- Failed or stuck injector (electrical or mechanical)
- Blown fuse or faulty power feed/relay to injectors
- Faulty ECM/PCM injector driver circuit
- Aftermarket parts or recent repairs with incorrect wiring
Symptoms
- Check Engine Light (MIL) illuminated
- Rough idle or misfire localized to cylinder 6
- Reduced engine power, hesitation or stumbling under load
- Poor fuel economy and increased emissions
- Possible hard starting or stumble during acceleration
What to check
- Retrieve trouble codes and freeze frame data with a scan tool; note freeze frame and readiness
- Visually inspect injector harness, connector, and pins at cylinder 6 for corrosion, damage or oil intrusion
- Check for any blown fuses or failed injector relay that supplies fuel injectors
- Backprobe injector connector with key ON to confirm reference voltage/power is present
- Measure injector coil resistance and compare to manufacturer spec
- Use a noid light or scan tool to confirm injector is being pulsed when commanded
Signal parameters
- Typical injector coil resistance: high-impedance 12–16 Ω, low-impedance 2–5 Ω (check OEM spec for exact value)
- Reference supply: battery voltage (~B+) present at injector power pin with key ON
- Driver output: ECM switches injector to ground; voltage at driver pin should drop near 0 V when commanded
- Pulse width: typical 1–5 ms at idle; varies with load and RPM (scan tool will show pulse width)
- Duty cycle: low at idle, increases with load; near 100% only at high demand
- Oscilloscope waveform: sharp ground-side switching edges; look for missing pulses, shorted waveform, or noisy signal
Diagnostic algorithm
- Confirm code and record freeze frame data. Clear codes and attempt to reproduce.
- Perform a visual inspection of wiring and connectors at cylinder 6 injector and ECM for obvious damage, corrosion or oil intrusion.
- With ignition OFF, unplug the injector connector and inspect pins; check for bent or pushed-out terminals.
- Measure injector coil resistance at the injector pins; compare to OEM spec. Replace injector if open or out-of-spec.
- With key ON (engine OFF) backprobe the connector to verify battery voltage on the power feed circuit. If no voltage, check fuse/relay/power distribution.
- Command the injector ON using a scan tool while monitoring the connector with a noid light or oscilloscope to confirm pulsing and waveform shape.
- While commanding the injector, measure voltage at the driver pin; it should switch to near ground when energized. If it stays at battery, suspect driver open; if stuck at ground, suspect short to ground.
- Check continuity between the injector connector and the ECM injector driver pin; inspect for short to battery or ground and for high resistance/opens.
- Swap the suspect injector with a known good injector of the same type. If the code or misfire follows the injector, replace the injector.
- If wiring and injector test good but code persists, inspect ECM connector and grounds. Repair damaged wiring or connector terminals as needed.
- As a last step, if all wiring and injector tests are good and fault remains, consider ECM/PCM driver failure and consult manufacturer procedures for ECM testing/replacement.
Likely causes
- Damaged connector or wiring (broken wire, pin corrosion, rodent damage)
- Injector shorted internally or open (failed injector coil)
- Poor pin contact at injector harness connector
- Injector fuse/relay or shared power feed open
- ECM driver fault (less common) or PCM software/firmware issue
Fault status
Status
P0206 - Cylinder 6 Injector A Circuit: ECM detected abnormal electrical condition (open, short, excessive/insufficient current or voltage) in the injector circuit for cylinder 6.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
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Code
P0206
MITSUBISHI
P — Powertrain
No.6 injector system
Views:
UK: 11
EN: 13
RU: 25
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring between ECM and cylinder 6 injector
- Poor or corroded connector at the injector or ECM
- Failed or stuck injector (electrical or mechanical)
- Blown fuse or faulty power feed/relay to injectors
- Faulty ECM/PCM injector driver circuit
- Aftermarket parts or recent repairs with incorrect wiring
Symptoms
- Check Engine Light (MIL) illuminated
- Rough idle or misfire localized to cylinder 6
- Reduced engine power, hesitation or stumbling under load
- Poor fuel economy and increased emissions
- Possible hard starting or stumble during acceleration
What to check
- Retrieve trouble codes and freeze frame data with a scan tool; note freeze frame and readiness
- Visually inspect injector harness, connector, and pins at cylinder 6 for corrosion, damage or oil intrusion
- Check for any blown fuses or failed injector relay that supplies fuel injectors
- Backprobe injector connector with key ON to confirm reference voltage/power is present
- Measure injector coil resistance and compare to manufacturer spec
- Use a noid light or scan tool to confirm injector is being pulsed when commanded
Signal parameters
- Typical injector coil resistance: high-impedance 12–16 Ω, low-impedance 2–5 Ω (check OEM spec for exact value)
- Reference supply: battery voltage (~B+) present at injector power pin with key ON
- Driver output: ECM switches injector to ground; voltage at driver pin should drop near 0 V when commanded
- Pulse width: typical 1–5 ms at idle; varies with load and RPM (scan tool will show pulse width)
- Duty cycle: low at idle, increases with load; near 100% only at high demand
- Oscilloscope waveform: sharp ground-side switching edges; look for missing pulses, shorted waveform, or noisy signal
Diagnostic algorithm
- Confirm code and record freeze frame data. Clear codes and attempt to reproduce.
- Perform a visual inspection of wiring and connectors at cylinder 6 injector and ECM for obvious damage, corrosion or oil intrusion.
- With ignition OFF, unplug the injector connector and inspect pins; check for bent or pushed-out terminals.
- Measure injector coil resistance at the injector pins; compare to OEM spec. Replace injector if open or out-of-spec.
- With key ON (engine OFF) backprobe the connector to verify battery voltage on the power feed circuit. If no voltage, check fuse/relay/power distribution.
- Command the injector ON using a scan tool while monitoring the connector with a noid light or oscilloscope to confirm pulsing and waveform shape.
- While commanding the injector, measure voltage at the driver pin; it should switch to near ground when energized. If it stays at battery, suspect driver open; if stuck at ground, suspect short to ground.
- Check continuity between the injector connector and the ECM injector driver pin; inspect for short to battery or ground and for high resistance/opens.
- Swap the suspect injector with a known good injector of the same type. If the code or misfire follows the injector, replace the injector.
- If wiring and injector test good but code persists, inspect ECM connector and grounds. Repair damaged wiring or connector terminals as needed.
- As a last step, if all wiring and injector tests are good and fault remains, consider ECM/PCM driver failure and consult manufacturer procedures for ECM testing/replacement.
Likely causes
- Damaged connector or wiring (broken wire, pin corrosion, rodent damage)
- Injector shorted internally or open (failed injector coil)
- Poor pin contact at injector harness connector
- Injector fuse/relay or shared power feed open
- ECM driver fault (less common) or PCM software/firmware issue
Fault status
Status
P0206 - Cylinder 6 Injector A Circuit: ECM detected abnormal electrical condition (open, short, excessive/insufficient current or voltage) in the injector circuit for cylinder 6.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
Your experience will help others
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Was this AI description helpful?
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👍 Like
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0
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