Code
P0265
Generic
P — Powertrain
Cylinder 2 Injector A Circuit High
Views:
UK: 24
EN: 51
RU: 40
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in injector 2 primary circuit
- Short to battery voltage (B+) on injector circuit
- Poor or corroded connector or terminal at injector 2
- Faulty injector (internal short/high resistance)
- Faulty PCM/ECM injector driver
- Poor ground or battery supply issues
Symptoms
- MIL/Check Engine lamp illuminated
- Rough idle or misfire at cylinder 2
- Reduced power and drivability issues under load
- Hard starting or longer cranking time
- Possible increased smoke or fuel consumption on diesel engines
What to check
- Read and record freeze-frame and live data (engine speed, load, injector PW, battery voltage)
- Perform visual inspection of injector harness, connector and engine wiring for damage or corrosion
- Verify battery voltage and charging system under load
- Measure primary injector resistance (with harness disconnected) and compare to specification
- Backprobe injector primary circuit while cranking/running to observe voltage waveform using a DVOM or scope
- Wiggle test wiring and connectors while observing live voltage/waveform for intermittent faults
Signal parameters
- Typical primary (control) circuit resting voltage: approx. battery voltage (about 11–14 V) when driver is open
- When driver grounds the circuit during injection the primary voltage should pull near 0–1.5 V (low-side switching) — measured waveform should show pulsed low periods
- Injector pulse width varies with engine load/speed (typically 1–10 ms at idle; increases with load) — compare pulse width to other cylinders
- Primary circuit current and waveform shape depend on injector design; abnormal/no current or steady high voltage indicates circuit fault
Diagnostic algorithm
- Connect scan tool, note freeze-frame and live data; confirm P0265 is active and note conditions when set (temp, RPM, load).
- Visually inspect harness, connector and pins at cylinder 2 injector for corrosion, bent pins, melted insulation or obvious damage; repair any problems found.
- Verify battery/charging system voltage is within normal range (approx. 12–14.5 V) with engine off and running.
- With ignition off, disconnect injector connector and measure primary winding resistance across injector terminals; compare to spec or a known-good injector. Replace if out of range.
- Reconnect, backprobe the injector primary and observe voltage/waveform with engine cranking/running. Expect battery voltage when driver open and pulsed low when energized. Look for stuck-high voltage or no pulsing.
- Perform wiggle test on harness and connectors while watching waveform/data to locate intermittent connections.
- Check continuity from the injector connector to the PCM pin and check for shorts to B+ or ground with harness disconnected.
- If available and safe, swap the suspect injector with a known-good injector on another cylinder; if the code moves, the injector is the likely cause.
- If wiring and injector check good, test/replace PCM driver for that channel or replace PCM per manufacturer procedure.
- After repair, clear codes and perform a road/highway verification to ensure the code does not return.
Likely causes
- Corroded/loose connector pin at cylinder 2 injector
- Wiring shorted to constant B+ due to damaged insulation
- Failed cylinder 2 injector with internal electrical fault
- PCM driver channel failed on injector 2
- Poor main power/ground affecting injector voltage readings
Fault status
Status
P0265 — Cylinder 2 Injector A Circuit High. ECM has detected abnormally high voltage on the primary injector circuit for cylinder 2. Inspect injector, wiring, connectors, power and PCM driver.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P0265
GWM
P — Powertrain
- High Injector Circuit Value 2 Cylinder
Views:
UK: 10
EN: 17
RU: 18
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in injector 2 primary circuit
- Short to battery voltage (B+) on injector circuit
- Poor or corroded connector or terminal at injector 2
- Faulty injector (internal short/high resistance)
- Faulty PCM/ECM injector driver
- Poor ground or battery supply issues
Symptoms
- MIL/Check Engine lamp illuminated
- Rough idle or misfire at cylinder 2
- Reduced power and drivability issues under load
- Hard starting or longer cranking time
- Possible increased smoke or fuel consumption on diesel engines
What to check
- Read and record freeze-frame and live data (engine speed, load, injector PW, battery voltage)
- Perform visual inspection of injector harness, connector and engine wiring for damage or corrosion
- Verify battery voltage and charging system under load
- Measure primary injector resistance (with harness disconnected) and compare to specification
- Backprobe injector primary circuit while cranking/running to observe voltage waveform using a DVOM or scope
- Wiggle test wiring and connectors while observing live voltage/waveform for intermittent faults
Signal parameters
- Typical primary (control) circuit resting voltage: approx. battery voltage (about 11–14 V) when driver is open
- When driver grounds the circuit during injection the primary voltage should pull near 0–1.5 V (low-side switching) — measured waveform should show pulsed low periods
- Injector pulse width varies with engine load/speed (typically 1–10 ms at idle; increases with load) — compare pulse width to other cylinders
- Primary circuit current and waveform shape depend on injector design; abnormal/no current or steady high voltage indicates circuit fault
Diagnostic algorithm
- Connect scan tool, note freeze-frame and live data; confirm P0265 is active and note conditions when set (temp, RPM, load).
- Visually inspect harness, connector and pins at cylinder 2 injector for corrosion, bent pins, melted insulation or obvious damage; repair any problems found.
- Verify battery/charging system voltage is within normal range (approx. 12–14.5 V) with engine off and running.
- With ignition off, disconnect injector connector and measure primary winding resistance across injector terminals; compare to spec or a known-good injector. Replace if out of range.
- Reconnect, backprobe the injector primary and observe voltage/waveform with engine cranking/running. Expect battery voltage when driver open and pulsed low when energized. Look for stuck-high voltage or no pulsing.
- Perform wiggle test on harness and connectors while watching waveform/data to locate intermittent connections.
- Check continuity from the injector connector to the PCM pin and check for shorts to B+ or ground with harness disconnected.
- If available and safe, swap the suspect injector with a known-good injector on another cylinder; if the code moves, the injector is the likely cause.
- If wiring and injector check good, test/replace PCM driver for that channel or replace PCM per manufacturer procedure.
- After repair, clear codes and perform a road/highway verification to ensure the code does not return.
Likely causes
- Corroded/loose connector pin at cylinder 2 injector
- Wiring shorted to constant B+ due to damaged insulation
- Failed cylinder 2 injector with internal electrical fault
- PCM driver channel failed on injector 2
- Poor main power/ground affecting injector voltage readings
Fault status
Status
P0265 — Cylinder 2 Injector A Circuit High. ECM has detected abnormally high voltage on the primary injector circuit for cylinder 2. Inspect injector, wiring, connectors, power and PCM driver.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P0265
HUMMER
P — Powertrain
Cylinder 2 Injector Circuit High
Views:
UK: 14
EN: 28
RU: 21
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in injector 2 primary circuit
- Short to battery voltage (B+) on injector circuit
- Poor or corroded connector or terminal at injector 2
- Faulty injector (internal short/high resistance)
- Faulty PCM/ECM injector driver
- Poor ground or battery supply issues
Symptoms
- MIL/Check Engine lamp illuminated
- Rough idle or misfire at cylinder 2
- Reduced power and drivability issues under load
- Hard starting or longer cranking time
- Possible increased smoke or fuel consumption on diesel engines
What to check
- Read and record freeze-frame and live data (engine speed, load, injector PW, battery voltage)
- Perform visual inspection of injector harness, connector and engine wiring for damage or corrosion
- Verify battery voltage and charging system under load
- Measure primary injector resistance (with harness disconnected) and compare to specification
- Backprobe injector primary circuit while cranking/running to observe voltage waveform using a DVOM or scope
- Wiggle test wiring and connectors while observing live voltage/waveform for intermittent faults
Signal parameters
- Typical primary (control) circuit resting voltage: approx. battery voltage (about 11–14 V) when driver is open
- When driver grounds the circuit during injection the primary voltage should pull near 0–1.5 V (low-side switching) — measured waveform should show pulsed low periods
- Injector pulse width varies with engine load/speed (typically 1–10 ms at idle; increases with load) — compare pulse width to other cylinders
- Primary circuit current and waveform shape depend on injector design; abnormal/no current or steady high voltage indicates circuit fault
Diagnostic algorithm
- Connect scan tool, note freeze-frame and live data; confirm P0265 is active and note conditions when set (temp, RPM, load).
- Visually inspect harness, connector and pins at cylinder 2 injector for corrosion, bent pins, melted insulation or obvious damage; repair any problems found.
- Verify battery/charging system voltage is within normal range (approx. 12–14.5 V) with engine off and running.
- With ignition off, disconnect injector connector and measure primary winding resistance across injector terminals; compare to spec or a known-good injector. Replace if out of range.
- Reconnect, backprobe the injector primary and observe voltage/waveform with engine cranking/running. Expect battery voltage when driver open and pulsed low when energized. Look for stuck-high voltage or no pulsing.
- Perform wiggle test on harness and connectors while watching waveform/data to locate intermittent connections.
- Check continuity from the injector connector to the PCM pin and check for shorts to B+ or ground with harness disconnected.
- If available and safe, swap the suspect injector with a known-good injector on another cylinder; if the code moves, the injector is the likely cause.
- If wiring and injector check good, test/replace PCM driver for that channel or replace PCM per manufacturer procedure.
- After repair, clear codes and perform a road/highway verification to ensure the code does not return.
Likely causes
- Corroded/loose connector pin at cylinder 2 injector
- Wiring shorted to constant B+ due to damaged insulation
- Failed cylinder 2 injector with internal electrical fault
- PCM driver channel failed on injector 2
- Poor main power/ground affecting injector voltage readings
Fault status
Status
P0265 — Cylinder 2 Injector A Circuit High. ECM has detected abnormally high voltage on the primary injector circuit for cylinder 2. Inspect injector, wiring, connectors, power and PCM driver.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
P0265
LAND ROVER
P — Powertrain
Cylinder 2 injector circuit high
Views:
UK: 15
EN: 30
RU: 27
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in injector 2 primary circuit
- Short to battery voltage (B+) on injector circuit
- Poor or corroded connector or terminal at injector 2
- Faulty injector (internal short/high resistance)
- Faulty PCM/ECM injector driver
- Poor ground or battery supply issues
Symptoms
- MIL/Check Engine lamp illuminated
- Rough idle or misfire at cylinder 2
- Reduced power and drivability issues under load
- Hard starting or longer cranking time
- Possible increased smoke or fuel consumption on diesel engines
What to check
- Read and record freeze-frame and live data (engine speed, load, injector PW, battery voltage)
- Perform visual inspection of injector harness, connector and engine wiring for damage or corrosion
- Verify battery voltage and charging system under load
- Measure primary injector resistance (with harness disconnected) and compare to specification
- Backprobe injector primary circuit while cranking/running to observe voltage waveform using a DVOM or scope
- Wiggle test wiring and connectors while observing live voltage/waveform for intermittent faults
Signal parameters
- Typical primary (control) circuit resting voltage: approx. battery voltage (about 11–14 V) when driver is open
- When driver grounds the circuit during injection the primary voltage should pull near 0–1.5 V (low-side switching) — measured waveform should show pulsed low periods
- Injector pulse width varies with engine load/speed (typically 1–10 ms at idle; increases with load) — compare pulse width to other cylinders
- Primary circuit current and waveform shape depend on injector design; abnormal/no current or steady high voltage indicates circuit fault
Diagnostic algorithm
- Connect scan tool, note freeze-frame and live data; confirm P0265 is active and note conditions when set (temp, RPM, load).
- Visually inspect harness, connector and pins at cylinder 2 injector for corrosion, bent pins, melted insulation or obvious damage; repair any problems found.
- Verify battery/charging system voltage is within normal range (approx. 12–14.5 V) with engine off and running.
- With ignition off, disconnect injector connector and measure primary winding resistance across injector terminals; compare to spec or a known-good injector. Replace if out of range.
- Reconnect, backprobe the injector primary and observe voltage/waveform with engine cranking/running. Expect battery voltage when driver open and pulsed low when energized. Look for stuck-high voltage or no pulsing.
- Perform wiggle test on harness and connectors while watching waveform/data to locate intermittent connections.
- Check continuity from the injector connector to the PCM pin and check for shorts to B+ or ground with harness disconnected.
- If available and safe, swap the suspect injector with a known-good injector on another cylinder; if the code moves, the injector is the likely cause.
- If wiring and injector check good, test/replace PCM driver for that channel or replace PCM per manufacturer procedure.
- After repair, clear codes and perform a road/highway verification to ensure the code does not return.
Likely causes
- Corroded/loose connector pin at cylinder 2 injector
- Wiring shorted to constant B+ due to damaged insulation
- Failed cylinder 2 injector with internal electrical fault
- PCM driver channel failed on injector 2
- Poor main power/ground affecting injector voltage readings
Fault status
Status
P0265 — Cylinder 2 Injector A Circuit High. ECM has detected abnormally high voltage on the primary injector circuit for cylinder 2. Inspect injector, wiring, connectors, power and PCM driver.
Repair difficulty: Medium
Diagnostic time: 1-3 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.
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Send to email