P02A5

Code

Generic P — Powertrain

Cylinder 3 - Injector Leaking

Brand: Generic

Type: P — Powertrain

Views: UK: 28 EN: 47 RU: 32

AI status

Completed

ready

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Page language: EN

Causes

Faulty or worn injector pintle or internal seal
Damaged injector O-ring or external leak at the injector body
Clogged or damaged injector return line (diesel systems) causing backflow
High fuel rail pressure or faulty pressure regulator
Contaminated fuel or debris damaging the injector seat
Corroded or damaged electrical connector/wiring causing unintended activation

Symptoms

Rough idle or misfire focused on cylinder 3
Hard starting or flooding after shut-down/when cranking
Increased fuel consumption
Black exhaust smoke (diesel) or strong fuel smell
Fuel present in oil (engine oil dilution) over time
Illuminated MIL and possible related misfire codes (e.g., P0303)

What to check

Read and record all stored and pending codes; note freeze frame data
Visual inspection for external fuel leaks around injector 3 and damaged O-rings
Check fuel level smell and visible fuel on engine or injector area
Scan-tool live data: short-term/long-term fuel trims, misfire counts for cylinder 3
Compare injector electrical resistance to manufacturer spec (ohms) and check connector continuity
Observe injector waveform or current draw with a scope/current clamp

Signal parameters

Injector coil resistance: varies by vehicle — commonly 2–16 ohms (low-impedance) or 12–18+ ohms (high-impedance); compare to OEM spec
Idle injector pulse width (gasoline): typically ~1–4 ms; (varies widely with engine/load and fuel system)
Current draw: steady-state and dynamic current should match spec; a continuously high/resting current or unexpected current when off may indicate leakage/stuck valve
Fuel rail pressure: should be within manufacturer range and stable; pressure spikes or excessive rail pressure can worsen leakage
Abnormal values indicative of leakage: unexpected fuel trim correction for that cylinder, persistent misfire counters, elevated return-flow (diesel), or erratic injector current waveform

Diagnostic algorithm

Confirm P02A5 is current and note any related codes (e.g., misfire codes).
Perform visual inspection for external fuel leaks and damaged O-rings/retainers at cylinder 3 injector.
Using a scan tool, monitor cylinder 3 misfire count, fuel trims, and injector pulse width while reproducing conditions; note anomalies.
Measure injector 3 electrical resistance and compare to specification; inspect wiring and connector for corrosion, damaged pins, or shorts to battery/ground.
Use an oscilloscope or current clamp to observe injector drive waveform and resting current; look for a signal when the injector should be closed or abnormal on-time.
Check fuel rail pressure and regulator operation; verify pressure is not excessively high which can force injectors to leak.
If accessible and safe, swap injector 3 with another cylinder’s injector; clear codes and test drive to see if the fault moves with the injector.
Conduct a return-flow or flow-rate test (diesel/high-pressure systems) or a bench test on the injector to confirm internal leakage or improper spray pattern.
If injector bench test confirms leakage or swap testing moves the fault, replace the faulty injector and any damaged seals or O-rings.
After repair, clear DTCs, recheck for leaks, run the engine, and verify the code does not return and related symptoms are resolved.

Likely causes

Internal injector leakage (pintle stuck partially open or failed internal seal)
External leak at injector sealing O-ring
Injector shorted or stuck due to contamination
Fuel rail pressure regulator stuck or excessive system pressure
Wiring/connector fault causing injector to remain energized

Fault status

⚠️ Status

P02A5 — Cylinder 3 injector leaking: ECM detected fuel injector on cylinder 3 leaking internally or externally; may cause misfire, fuel dilution of oil, or poor driveability.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours

Repair manuals

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Code

P02A5

LAND ROVER P — Powertrain

cylinder balance 3 - injector leak

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 13 EN: 27 RU: 20

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty or worn injector pintle or internal seal
Damaged injector O-ring or external leak at the injector body
Clogged or damaged injector return line (diesel systems) causing backflow
High fuel rail pressure or faulty pressure regulator
Contaminated fuel or debris damaging the injector seat
Corroded or damaged electrical connector/wiring causing unintended activation

Symptoms

Rough idle or misfire focused on cylinder 3
Hard starting or flooding after shut-down/when cranking
Increased fuel consumption
Black exhaust smoke (diesel) or strong fuel smell
Fuel present in oil (engine oil dilution) over time
Illuminated MIL and possible related misfire codes (e.g., P0303)

What to check

Read and record all stored and pending codes; note freeze frame data
Visual inspection for external fuel leaks around injector 3 and damaged O-rings
Check fuel level smell and visible fuel on engine or injector area
Scan-tool live data: short-term/long-term fuel trims, misfire counts for cylinder 3
Compare injector electrical resistance to manufacturer spec (ohms) and check connector continuity
Observe injector waveform or current draw with a scope/current clamp

Signal parameters

Injector coil resistance: varies by vehicle — commonly 2–16 ohms (low-impedance) or 12–18+ ohms (high-impedance); compare to OEM spec
Idle injector pulse width (gasoline): typically ~1–4 ms; (varies widely with engine/load and fuel system)
Current draw: steady-state and dynamic current should match spec; a continuously high/resting current or unexpected current when off may indicate leakage/stuck valve
Fuel rail pressure: should be within manufacturer range and stable; pressure spikes or excessive rail pressure can worsen leakage
Abnormal values indicative of leakage: unexpected fuel trim correction for that cylinder, persistent misfire counters, elevated return-flow (diesel), or erratic injector current waveform

Diagnostic algorithm

Confirm P02A5 is current and note any related codes (e.g., misfire codes).
Perform visual inspection for external fuel leaks and damaged O-rings/retainers at cylinder 3 injector.
Using a scan tool, monitor cylinder 3 misfire count, fuel trims, and injector pulse width while reproducing conditions; note anomalies.
Measure injector 3 electrical resistance and compare to specification; inspect wiring and connector for corrosion, damaged pins, or shorts to battery/ground.
Use an oscilloscope or current clamp to observe injector drive waveform and resting current; look for a signal when the injector should be closed or abnormal on-time.
Check fuel rail pressure and regulator operation; verify pressure is not excessively high which can force injectors to leak.
If accessible and safe, swap injector 3 with another cylinder’s injector; clear codes and test drive to see if the fault moves with the injector.
Conduct a return-flow or flow-rate test (diesel/high-pressure systems) or a bench test on the injector to confirm internal leakage or improper spray pattern.
If injector bench test confirms leakage or swap testing moves the fault, replace the faulty injector and any damaged seals or O-rings.
After repair, clear DTCs, recheck for leaks, run the engine, and verify the code does not return and related symptoms are resolved.

Likely causes

Internal injector leakage (pintle stuck partially open or failed internal seal)
External leak at injector sealing O-ring
Injector shorted or stuck due to contamination
Fuel rail pressure regulator stuck or excessive system pressure
Wiring/connector fault causing injector to remain energized

Fault status

⚠️ Status

P02A5 — Cylinder 3 injector leaking: ECM detected fuel injector on cylinder 3 leaking internally or externally; may cause misfire, fuel dilution of oil, or poor driveability.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours

Repair manuals

Manual library for LAND ROVER

320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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P02A5 — Cylinder 3 - Injector Leaking

P02A5

Causes

Symptoms

What to check

Signal parameters

Diagnostic algorithm

Likely causes

Fault status

Brands with available manuals

P02A5

Causes

Symptoms

What to check

Signal parameters

Diagnostic algorithm

Likely causes

Fault status

Manual library for LAND ROVER

LAND ROVER