Code
P02D7
LAND ROVER
P — Powertrain
Cylinder 6 - Fuel injector compensation learning maximum limit
Views:
UK: 14
EN: 24
RU: 16
AI status
Completed
Completed
100%
Causes
- Faulty fuel injector (mechanical fault, stuck, leaking, or clogged)
- High or low fuel pressure / fuel supply problem
- Open/short/poor connection in injector wiring or connector corrosion
- High injector coil resistance or intermittent injector driver circuit
- Excessive cylinder air/fuel imbalance (compression or intake leak)
- ECM/PCM software, memory or driver transistor failure
Symptoms
- Malfunction Indicator Lamp (MIL) on
- Rough idle or vibration, local to cylinder 6
- Misfire detected for cylinder 6 (possible P0306)
- Reduced engine power or hesitation
- Increased fuel consumption and higher emissions
- Difficulty starting or uneven idle after start
What to check
- Read and record all stored/ pending DTCs and freeze frame data
- Check live data: injector compensation/trim values, misfire counters, injector pulse widths and fuel rail pressure
- Visually inspect injector harness and connector at cylinder 6 for corrosion, damage, or loose pins
- Measure injector coil resistance and compare with manufacturer specification
- Backprobing injector driver signal with oscilloscope or noid light while cranking/idle
- Check fuel pressure at the rail and inspect filter condition
Signal parameters
- Injector coil resistance (Ω) — typical range depends on injector type; consult OEM spec (commonly ~2–16 Ω)
- Injector pulse width at idle — typically ~1–4 ms (varies with engine/load)
- Injector compensation/trim value — reported as microseconds or percentage; code indicates trim has reached maximum allowed limit
- Fuel rail pressure — verify against vehicle specification (varies by system)
- Crank/cam sync signal status and misfire count for cylinder 6
Diagnostic algorithm
- Retrieve DTCs and freeze-frame; note engine conditions when code set (temp, load, RPM, fuel rail pressure).
- Inspect wiring and connector at cylinder 6 injector for damage, corrosion, bent pins, or water ingress. Repair as needed.
- Measure injector coil resistance and compare to OEM spec. If out of range, replace injector.
- Backprobe the injector connector and verify injector driver signal (noid light or oscilloscope). Check for proper pulse width and waveform while cranking/idle.
- Check continuity and resistance of wiring between injector connector and PCM; repair any short/open/ground faults.
- Check fuel rail pressure and flow; replace fuel filter and ensure feed pump is within spec if pressure is low or unstable.
- Perform a cylinder balance or swap test: swap cylinder 6 injector with another known-good injector. If problem follows the injector, replace it.
- If swap doesn’t move the fault, perform compression/leakdown test on cylinder 6 to rule out mechanical causes.
- Clear codes after repairs and perform a drive/road test with live data to confirm injector compensation trims return to acceptable range.
- If all hardware checks good and trims still at limit, check for ECU software updates or consider PCM/ECM inspection/replacement as last resort.
Likely causes
- Cylinder 6 injector failing (electrical or hydraulic)
- Damaged/chafed wiring harness or poor pin contact at injector connector
- Low/variable fuel rail pressure or clogged fuel filter
- Compression loss or intake leak on cylinder 6 causing the ECU to increase compensation
- Intermittent injector driver/open circuit in PCM
Fault status
Status
ECM reached maximum learned compensation for cylinder 6 fuel injector — injector not meeting expected fuel delivery.
Repair difficulty: Medium
Diagnostic time: 1.0 - 3.0 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.
👍 Like
0
👎 Dislike
0
Send to email