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Home / DTC / P0207 — Cylinder 7 Injector A Circuit

P0207 — Cylinder 7 Injector A Circuit

Detailed page for trouble code P0207.

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Code

P0207

Generic P — Powertrain

Cylinder 7 Injector A Circuit

Brand: Generic
Type: P — Powertrain
Views: UK: 16 EN: 31 RU: 24
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the injector harness for cylinder 7
  • Corroded, loose, or damaged injector connector/terminal
  • Failed fuel injector (internal short/open)
  • Faulty ECM/PCM driver transistor for injector circuit
  • Faulty ground, poor battery/ignition supply to injector rail
  • Blown fuse or faulty power/relay feeding the injectors

Symptoms

  • Check Engine Light illuminated with stored P0207
  • Rough idle or engine misfire (may see P0307)
  • Reduced engine power, hesitation or poor throttle response
  • Lower fuel economy or fuel smell from unburned fuel
  • Hard start or extended cranking

What to check

  • Read freeze-frame data and note related codes (e.g., misfire P0307)
  • Visually inspect injector #7 connector and harness for damage, corrosion, or pin backout
  • Check for battery voltage at the injector supply pin with key ON (engine OFF)
  • Measure injector coil resistance at the connector (unplugged) and compare to spec
  • Backprobe injector signal while cranking/idling with a scope or lab meter to confirm pulse
  • Wiggle test wiring while monitoring for code or signal change

Signal parameters

  • Injector supply voltage: ~12 V (key ON, engine OFF) at the injector power rail (varies by vehicle)
  • Injector coil resistance: typically low-impedance 2–5 ohms or high-impedance 10–16 ohms depending on design (check vehicle spec)
  • Injector driver signal: pulsed duty cycle; pulse width typically ~1–15 ms depending on engine load
  • Driver output behavior: ECM usually switches the injector to ground (signal pulses between ~0 V and battery voltage)
  • No continuous short to battery or ground should be present on the injector circuit

Diagnostic algorithm

  1. Confirm P0207 is current or historic and note freeze-frame/conditions. Check for accompanying codes (e.g., P0307, other P02xx).
  2. Perform a visual inspection of the cylinder 7 injector connector, wiring harness, and nearby components for damage, corrosion, or pin damage.
  3. With ignition OFF, disconnect the injector connector and measure coil resistance across injector pins. Compare to vehicle specification. Replace if out of spec.
  4. With key ON (engine OFF) measure battery voltage at the injector power terminal. No voltage indicates fuse/relay/power supply issue.
  5. Backprobe the injector signal pin with a lab scope or a suitable pulse-detecting meter while cranking/idle to verify pulsed signal. If no pulse, check continuity to ECM.
  6. Check continuity between the injector signal pin and the ECM connector pin, and check for shorts to ground or battery. Repair any wiring faults.
  7. Swap the suspect injector with another cylinder (if practical) and see if the code/misfire follows the injector — only do this if safe and recommended for the vehicle.
  8. If wiring and injector check good but no control signal from ECM, consider testing or replacing the ECM driver for that channel per manufacturer procedures.
  9. After repair, clear codes and perform test drive/verification to ensure code does not return and engine runs smoothly.

Likely causes

  • Damaged or corroded connector at injector #7
  • Open or short in the harness between injector #7 and ECM
  • Defective injector coil (internal short or open)
  • ECM/PCM driver failure (less common)
  • Intermittent wiring fault caused by vibration or chafing

Fault status

⚠️ Status
P0207 — Cylinder 7 Injector A Circuit: The ECM detected a malfunction in the electrical circuit for injector A on cylinder 7 (open, short, or driver fault).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours
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Code

P0207

GWM P — Powertrain

- Injector malfunction - cylinder 7

Brand: GWM
Type: P — Powertrain
Views: UK: 7 EN: 7 RU: 7
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the injector harness for cylinder 7
  • Corroded, loose, or damaged injector connector/terminal
  • Failed fuel injector (internal short/open)
  • Faulty ECM/PCM driver transistor for injector circuit
  • Faulty ground, poor battery/ignition supply to injector rail
  • Blown fuse or faulty power/relay feeding the injectors

Symptoms

  • Check Engine Light illuminated with stored P0207
  • Rough idle or engine misfire (may see P0307)
  • Reduced engine power, hesitation or poor throttle response
  • Lower fuel economy or fuel smell from unburned fuel
  • Hard start or extended cranking

What to check

  • Read freeze-frame data and note related codes (e.g., misfire P0307)
  • Visually inspect injector #7 connector and harness for damage, corrosion, or pin backout
  • Check for battery voltage at the injector supply pin with key ON (engine OFF)
  • Measure injector coil resistance at the connector (unplugged) and compare to spec
  • Backprobe injector signal while cranking/idling with a scope or lab meter to confirm pulse
  • Wiggle test wiring while monitoring for code or signal change

Signal parameters

  • Injector supply voltage: ~12 V (key ON, engine OFF) at the injector power rail (varies by vehicle)
  • Injector coil resistance: typically low-impedance 2–5 ohms or high-impedance 10–16 ohms depending on design (check vehicle spec)
  • Injector driver signal: pulsed duty cycle; pulse width typically ~1–15 ms depending on engine load
  • Driver output behavior: ECM usually switches the injector to ground (signal pulses between ~0 V and battery voltage)
  • No continuous short to battery or ground should be present on the injector circuit

Diagnostic algorithm

  1. Confirm P0207 is current or historic and note freeze-frame/conditions. Check for accompanying codes (e.g., P0307, other P02xx).
  2. Perform a visual inspection of the cylinder 7 injector connector, wiring harness, and nearby components for damage, corrosion, or pin damage.
  3. With ignition OFF, disconnect the injector connector and measure coil resistance across injector pins. Compare to vehicle specification. Replace if out of spec.
  4. With key ON (engine OFF) measure battery voltage at the injector power terminal. No voltage indicates fuse/relay/power supply issue.
  5. Backprobe the injector signal pin with a lab scope or a suitable pulse-detecting meter while cranking/idle to verify pulsed signal. If no pulse, check continuity to ECM.
  6. Check continuity between the injector signal pin and the ECM connector pin, and check for shorts to ground or battery. Repair any wiring faults.
  7. Swap the suspect injector with another cylinder (if practical) and see if the code/misfire follows the injector — only do this if safe and recommended for the vehicle.
  8. If wiring and injector check good but no control signal from ECM, consider testing or replacing the ECM driver for that channel per manufacturer procedures.
  9. After repair, clear codes and perform test drive/verification to ensure code does not return and engine runs smoothly.

Likely causes

  • Damaged or corroded connector at injector #7
  • Open or short in the harness between injector #7 and ECM
  • Defective injector coil (internal short or open)
  • ECM/PCM driver failure (less common)
  • Intermittent wiring fault caused by vibration or chafing

Fault status

⚠️ Status
P0207 — Cylinder 7 Injector A Circuit: The ECM detected a malfunction in the electrical circuit for injector A on cylinder 7 (open, short, or driver fault).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours
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Code

P0207

HUMMER P — Powertrain

Injector 7 Control Circuit

Brand: HUMMER
Type: P — Powertrain
Views: UK: 7 EN: 16 RU: 13
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the injector harness for cylinder 7
  • Corroded, loose, or damaged injector connector/terminal
  • Failed fuel injector (internal short/open)
  • Faulty ECM/PCM driver transistor for injector circuit
  • Faulty ground, poor battery/ignition supply to injector rail
  • Blown fuse or faulty power/relay feeding the injectors

Symptoms

  • Check Engine Light illuminated with stored P0207
  • Rough idle or engine misfire (may see P0307)
  • Reduced engine power, hesitation or poor throttle response
  • Lower fuel economy or fuel smell from unburned fuel
  • Hard start or extended cranking

What to check

  • Read freeze-frame data and note related codes (e.g., misfire P0307)
  • Visually inspect injector #7 connector and harness for damage, corrosion, or pin backout
  • Check for battery voltage at the injector supply pin with key ON (engine OFF)
  • Measure injector coil resistance at the connector (unplugged) and compare to spec
  • Backprobe injector signal while cranking/idling with a scope or lab meter to confirm pulse
  • Wiggle test wiring while monitoring for code or signal change

Signal parameters

  • Injector supply voltage: ~12 V (key ON, engine OFF) at the injector power rail (varies by vehicle)
  • Injector coil resistance: typically low-impedance 2–5 ohms or high-impedance 10–16 ohms depending on design (check vehicle spec)
  • Injector driver signal: pulsed duty cycle; pulse width typically ~1–15 ms depending on engine load
  • Driver output behavior: ECM usually switches the injector to ground (signal pulses between ~0 V and battery voltage)
  • No continuous short to battery or ground should be present on the injector circuit

Diagnostic algorithm

  1. Confirm P0207 is current or historic and note freeze-frame/conditions. Check for accompanying codes (e.g., P0307, other P02xx).
  2. Perform a visual inspection of the cylinder 7 injector connector, wiring harness, and nearby components for damage, corrosion, or pin damage.
  3. With ignition OFF, disconnect the injector connector and measure coil resistance across injector pins. Compare to vehicle specification. Replace if out of spec.
  4. With key ON (engine OFF) measure battery voltage at the injector power terminal. No voltage indicates fuse/relay/power supply issue.
  5. Backprobe the injector signal pin with a lab scope or a suitable pulse-detecting meter while cranking/idle to verify pulsed signal. If no pulse, check continuity to ECM.
  6. Check continuity between the injector signal pin and the ECM connector pin, and check for shorts to ground or battery. Repair any wiring faults.
  7. Swap the suspect injector with another cylinder (if practical) and see if the code/misfire follows the injector — only do this if safe and recommended for the vehicle.
  8. If wiring and injector check good but no control signal from ECM, consider testing or replacing the ECM driver for that channel per manufacturer procedures.
  9. After repair, clear codes and perform test drive/verification to ensure code does not return and engine runs smoothly.

Likely causes

  • Damaged or corroded connector at injector #7
  • Open or short in the harness between injector #7 and ECM
  • Defective injector coil (internal short or open)
  • ECM/PCM driver failure (less common)
  • Intermittent wiring fault caused by vibration or chafing

Fault status

⚠️ Status
P0207 — Cylinder 7 Injector A Circuit: The ECM detected a malfunction in the electrical circuit for injector A on cylinder 7 (open, short, or driver fault).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P0207

LAND ROVER P — Powertrain

Cylinder with defect in injector circuit 7

Brand: LAND ROVER
Type: P — Powertrain
Views: UK: 6 EN: 13 RU: 11
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the injector harness for cylinder 7
  • Corroded, loose, or damaged injector connector/terminal
  • Failed fuel injector (internal short/open)
  • Faulty ECM/PCM driver transistor for injector circuit
  • Faulty ground, poor battery/ignition supply to injector rail
  • Blown fuse or faulty power/relay feeding the injectors

Symptoms

  • Check Engine Light illuminated with stored P0207
  • Rough idle or engine misfire (may see P0307)
  • Reduced engine power, hesitation or poor throttle response
  • Lower fuel economy or fuel smell from unburned fuel
  • Hard start or extended cranking

What to check

  • Read freeze-frame data and note related codes (e.g., misfire P0307)
  • Visually inspect injector #7 connector and harness for damage, corrosion, or pin backout
  • Check for battery voltage at the injector supply pin with key ON (engine OFF)
  • Measure injector coil resistance at the connector (unplugged) and compare to spec
  • Backprobe injector signal while cranking/idling with a scope or lab meter to confirm pulse
  • Wiggle test wiring while monitoring for code or signal change

Signal parameters

  • Injector supply voltage: ~12 V (key ON, engine OFF) at the injector power rail (varies by vehicle)
  • Injector coil resistance: typically low-impedance 2–5 ohms or high-impedance 10–16 ohms depending on design (check vehicle spec)
  • Injector driver signal: pulsed duty cycle; pulse width typically ~1–15 ms depending on engine load
  • Driver output behavior: ECM usually switches the injector to ground (signal pulses between ~0 V and battery voltage)
  • No continuous short to battery or ground should be present on the injector circuit

Diagnostic algorithm

  1. Confirm P0207 is current or historic and note freeze-frame/conditions. Check for accompanying codes (e.g., P0307, other P02xx).
  2. Perform a visual inspection of the cylinder 7 injector connector, wiring harness, and nearby components for damage, corrosion, or pin damage.
  3. With ignition OFF, disconnect the injector connector and measure coil resistance across injector pins. Compare to vehicle specification. Replace if out of spec.
  4. With key ON (engine OFF) measure battery voltage at the injector power terminal. No voltage indicates fuse/relay/power supply issue.
  5. Backprobe the injector signal pin with a lab scope or a suitable pulse-detecting meter while cranking/idle to verify pulsed signal. If no pulse, check continuity to ECM.
  6. Check continuity between the injector signal pin and the ECM connector pin, and check for shorts to ground or battery. Repair any wiring faults.
  7. Swap the suspect injector with another cylinder (if practical) and see if the code/misfire follows the injector — only do this if safe and recommended for the vehicle.
  8. If wiring and injector check good but no control signal from ECM, consider testing or replacing the ECM driver for that channel per manufacturer procedures.
  9. After repair, clear codes and perform test drive/verification to ensure code does not return and engine runs smoothly.

Likely causes

  • Damaged or corroded connector at injector #7
  • Open or short in the harness between injector #7 and ECM
  • Defective injector coil (internal short or open)
  • ECM/PCM driver failure (less common)
  • Intermittent wiring fault caused by vibration or chafing

Fault status

⚠️ Status
P0207 — Cylinder 7 Injector A Circuit: The ECM detected a malfunction in the electrical circuit for injector A on cylinder 7 (open, short, or driver fault).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours
Workshop Manuals

Repair manuals for LAND ROVER

3

Land Rover Defender 300Tdi — Workshop Manual (1996 model year)

Workshop Manual
Defender 300Tdi Years: 1996 Manual in English 7.5 MB
Short description

Official workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.

199,00 UAH
Contents
Key sections:
  • 01 INTRODUCTION
  • 04 GENERAL SPECIFICATION DATA
  • 05 ENGINE TUNING DATA
  • 07 GENERAL FITTING REMINDERS
  • 09 LUBRICANTS, FLUIDS AND CAPACITIES
  • 10 MAINTENANCE
  • 12 ENGINE Tdi
  • - Description and operation
  • - Fault diagnosis
  • - Adjustment
  • - Repair and overhaul procedures
  • 19 FUEL SYSTEM Tdi
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Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)

Workshop Manual
Defender Years: 1999–2002 Manual in English 7.6 MB
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Workshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.

199,00 UAH
Contents
Key sections:
  • 01 - INTRODUCTION
  • - Introduction
  • - Dimensions
  • - References
  • - Repairs and replacements
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  • - Synthetic rubber
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  • - Used engine oil precautions
  • - Accessories and conversions
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Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)

Workshop Manual
Manual in English Pages: 494 7.1 MB
Short description

Land Rover Range Rover Electrical Library (LRL 0453ENG). Comprehensive manual covering fuse details, earth points, system descriptions, diagnostics and connector pin-outs for electrical troubleshooting and repair. Intended for technicians and service workshops.

199,00 UAH
Contents
Key sections:
  • 1 INTRODUCTION
  • 1.1 About this document
  • 1.2 Battery voltage
  • 1.3 Electrical precautions
  • 1.4 Battery disconnecting / charging
  • 1.5 Disciplines / greases
  • 1.6 Abbreviations
  • 1.7 HeVAC, sensors abbreviations
  • 1.8 How to use this document
  • 1.9 Connector detail format
  • 1.10 Fault diagnosis
  • 1.11 Wire colour codes
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Code

P0207

MITSUBISHI P — Powertrain

No.7 injector system

Brand: MITSUBISHI
Type: P — Powertrain
Views: UK: 7 EN: 14 RU: 13
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the injector harness for cylinder 7
  • Corroded, loose, or damaged injector connector/terminal
  • Failed fuel injector (internal short/open)
  • Faulty ECM/PCM driver transistor for injector circuit
  • Faulty ground, poor battery/ignition supply to injector rail
  • Blown fuse or faulty power/relay feeding the injectors

Symptoms

  • Check Engine Light illuminated with stored P0207
  • Rough idle or engine misfire (may see P0307)
  • Reduced engine power, hesitation or poor throttle response
  • Lower fuel economy or fuel smell from unburned fuel
  • Hard start or extended cranking

What to check

  • Read freeze-frame data and note related codes (e.g., misfire P0307)
  • Visually inspect injector #7 connector and harness for damage, corrosion, or pin backout
  • Check for battery voltage at the injector supply pin with key ON (engine OFF)
  • Measure injector coil resistance at the connector (unplugged) and compare to spec
  • Backprobe injector signal while cranking/idling with a scope or lab meter to confirm pulse
  • Wiggle test wiring while monitoring for code or signal change

Signal parameters

  • Injector supply voltage: ~12 V (key ON, engine OFF) at the injector power rail (varies by vehicle)
  • Injector coil resistance: typically low-impedance 2–5 ohms or high-impedance 10–16 ohms depending on design (check vehicle spec)
  • Injector driver signal: pulsed duty cycle; pulse width typically ~1–15 ms depending on engine load
  • Driver output behavior: ECM usually switches the injector to ground (signal pulses between ~0 V and battery voltage)
  • No continuous short to battery or ground should be present on the injector circuit

Diagnostic algorithm

  1. Confirm P0207 is current or historic and note freeze-frame/conditions. Check for accompanying codes (e.g., P0307, other P02xx).
  2. Perform a visual inspection of the cylinder 7 injector connector, wiring harness, and nearby components for damage, corrosion, or pin damage.
  3. With ignition OFF, disconnect the injector connector and measure coil resistance across injector pins. Compare to vehicle specification. Replace if out of spec.
  4. With key ON (engine OFF) measure battery voltage at the injector power terminal. No voltage indicates fuse/relay/power supply issue.
  5. Backprobe the injector signal pin with a lab scope or a suitable pulse-detecting meter while cranking/idle to verify pulsed signal. If no pulse, check continuity to ECM.
  6. Check continuity between the injector signal pin and the ECM connector pin, and check for shorts to ground or battery. Repair any wiring faults.
  7. Swap the suspect injector with another cylinder (if practical) and see if the code/misfire follows the injector — only do this if safe and recommended for the vehicle.
  8. If wiring and injector check good but no control signal from ECM, consider testing or replacing the ECM driver for that channel per manufacturer procedures.
  9. After repair, clear codes and perform test drive/verification to ensure code does not return and engine runs smoothly.

Likely causes

  • Damaged or corroded connector at injector #7
  • Open or short in the harness between injector #7 and ECM
  • Defective injector coil (internal short or open)
  • ECM/PCM driver failure (less common)
  • Intermittent wiring fault caused by vibration or chafing

Fault status

⚠️ Status
P0207 — Cylinder 7 Injector A Circuit: The ECM detected a malfunction in the electrical circuit for injector A on cylinder 7 (open, short, or driver fault).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours
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