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Home / DTC / P02F2 — Cylinder 5 Injector Circuit Range/Performance

P02F2 — Cylinder 5 Injector Circuit Range/Performance

Detailed page for trouble code P02F2.

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22,491specific
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Code

P02F2

Generic P — Powertrain

Cylinder 5 Injector Circuit Range/Performance

Brand: Generic
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring to cylinder 5 injector (broken conductor, chafing, corrosion)
  • Poor or corroded connector pin/contact at the injector
  • Failed fuel injector (stuck, internal short, high resistance)
  • Low or intermittent injector supply voltage (fused feed, relay, ignition-switched power)
  • Poor engine/PCM ground or high resistance in ground path
  • Contaminated or clogged injector altering flow characteristics

Symptoms

  • Check Engine Light (MIL) on
  • Rough idle or vibration, especially at idle
  • Misfire indicated for cylinder 5 or uneven running
  • Loss of power, hesitation or poor acceleration
  • Reduced fuel economy and increased emissions
  • Hard starting or extended cranking

What to check

  • Read all stored and pending DTCs and freeze-frame data with a scan tool
  • Check live data: injector pulse width/duty, short-term/long-term fuel trims, and misfire counters
  • Compare cylinder 5 data to adjacent cylinders (balance tests, relative compression if available)
  • Visually inspect wiring harness and connector at injector for damage, corrosion, or oil/water intrusion
  • Measure injector coil resistance with an ohmmeter (engine off) and compare to spec
  • Back-probe connector with engine cranking/running to verify injector supply voltage and switching signal

Signal parameters

  • Injector coil resistance: vehicle-specific (typical range ~1–16 Ω; consult service data for exact spec)
  • Injector command: pulsed ground or pulsed positive from PCM, amplitude typically near battery voltage (0–12 V)
  • Pulse width: varies by load and RPM (approximately 1–10 ms under many conditions)
  • Supply voltage at injector fuse/rail: battery voltage ±0.5 V during cranking/running
  • Injector current: low-impedance drivers can draw several amps; high-impedance injectors draw less (vehicle-specific)

Diagnostic algorithm

  1. Retrieve all codes and freeze-frame data using a scan tool. Note operating conditions when the code set.
  2. Inspect harness and connector at cylinder 5 for damage, corrosion, water, rodent chew, or loose terminal.
  3. With ignition off, measure injector coil resistance at the injector pins and compare to factory spec.
  4. Check power feed to the injector connector (battery voltage with key ON) and verify fuse/relay supplying injectors.
  5. Back-probe injector connector with engine cranking/running to confirm PCM switching signal (use noid light or oscilloscope).
  6. Wiggle the harness and connectors while monitoring live data or watch for code reappearance to find intermittent faults.
  7. If wiring and signals are correct, swap the suspect injector with another cylinder (if practical) and see if code follows injector.
  8. If code follows the injector, replace the injector and retest. If code stays on cylinder 5, trace and repair wiring or connector.
  9. Verify fuel rail pressure and inspect for clogged injector or flow issues if electrical checks pass but performance is poor.
  10. If wiring and injector test good, inspect PCM grounds and power supplies; consider reprogramming or replacing PCM as last resort.
  11. Safety note: relieve fuel system pressure before disconnecting injectors or fuel lines. Take proper precautions for fuel system work.

Likely causes

  • Damaged wiring harness or connector at cylinder 5 injector
  • Failed injector coil (open, shorted, or intermittent)
  • Faulty or weak injector supply/relay/fuse
  • Poor ground for ECM or injector ground circuit
  • Contamination or mechanical failure inside injector

Fault status

⚠️ Status
MIL illuminated; PCM stored a Cylinder 5 injector range/performance code (P02F2) and may have captured freeze-frame parameters. Code may be active or pending depending on current conditions. Additional injector- or cylinder-related codes (misfire or open circuit) may be present.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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Code

P02F2

LAND ROVER P — Powertrain

Cylinder 5 - Injector circuit range / performance

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring to cylinder 5 injector (broken conductor, chafing, corrosion)
  • Poor or corroded connector pin/contact at the injector
  • Failed fuel injector (stuck, internal short, high resistance)
  • Low or intermittent injector supply voltage (fused feed, relay, ignition-switched power)
  • Poor engine/PCM ground or high resistance in ground path
  • Contaminated or clogged injector altering flow characteristics

Symptoms

  • Check Engine Light (MIL) on
  • Rough idle or vibration, especially at idle
  • Misfire indicated for cylinder 5 or uneven running
  • Loss of power, hesitation or poor acceleration
  • Reduced fuel economy and increased emissions
  • Hard starting or extended cranking

What to check

  • Read all stored and pending DTCs and freeze-frame data with a scan tool
  • Check live data: injector pulse width/duty, short-term/long-term fuel trims, and misfire counters
  • Compare cylinder 5 data to adjacent cylinders (balance tests, relative compression if available)
  • Visually inspect wiring harness and connector at injector for damage, corrosion, or oil/water intrusion
  • Measure injector coil resistance with an ohmmeter (engine off) and compare to spec
  • Back-probe connector with engine cranking/running to verify injector supply voltage and switching signal

Signal parameters

  • Injector coil resistance: vehicle-specific (typical range ~1–16 Ω; consult service data for exact spec)
  • Injector command: pulsed ground or pulsed positive from PCM, amplitude typically near battery voltage (0–12 V)
  • Pulse width: varies by load and RPM (approximately 1–10 ms under many conditions)
  • Supply voltage at injector fuse/rail: battery voltage ±0.5 V during cranking/running
  • Injector current: low-impedance drivers can draw several amps; high-impedance injectors draw less (vehicle-specific)

Diagnostic algorithm

  1. Retrieve all codes and freeze-frame data using a scan tool. Note operating conditions when the code set.
  2. Inspect harness and connector at cylinder 5 for damage, corrosion, water, rodent chew, or loose terminal.
  3. With ignition off, measure injector coil resistance at the injector pins and compare to factory spec.
  4. Check power feed to the injector connector (battery voltage with key ON) and verify fuse/relay supplying injectors.
  5. Back-probe injector connector with engine cranking/running to confirm PCM switching signal (use noid light or oscilloscope).
  6. Wiggle the harness and connectors while monitoring live data or watch for code reappearance to find intermittent faults.
  7. If wiring and signals are correct, swap the suspect injector with another cylinder (if practical) and see if code follows injector.
  8. If code follows the injector, replace the injector and retest. If code stays on cylinder 5, trace and repair wiring or connector.
  9. Verify fuel rail pressure and inspect for clogged injector or flow issues if electrical checks pass but performance is poor.
  10. If wiring and injector test good, inspect PCM grounds and power supplies; consider reprogramming or replacing PCM as last resort.
  11. Safety note: relieve fuel system pressure before disconnecting injectors or fuel lines. Take proper precautions for fuel system work.

Likely causes

  • Damaged wiring harness or connector at cylinder 5 injector
  • Failed injector coil (open, shorted, or intermittent)
  • Faulty or weak injector supply/relay/fuse
  • Poor ground for ECM or injector ground circuit
  • Contamination or mechanical failure inside injector

Fault status

⚠️ Status
MIL illuminated; PCM stored a Cylinder 5 injector range/performance code (P02F2) and may have captured freeze-frame parameters. Code may be active or pending depending on current conditions. Additional injector- or cylinder-related codes (misfire or open circuit) may be present.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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