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Home >> Land Rover >> 2000 >> Range Rover Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - With Codes >> Diagnostic Tests (BOSCH) >> DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P1300, P1301, P1302, P1303, P1304, P1305, P1306, P1307, P1308, P1319: Misfire Detected In One Or More Cylinders >> Diagnosis & Repair

Diagnosis & Repair

  1. Ensure ECM misfire detection system is properly calibrated for the fluctuations between CKP sensor and the reluctor tooth positions. ECM carries out flywheel and reluctor ring adaptations at various engine speed ranges and can be monitored by TestBook. See ECM MISFIRE DETECTION ENGINE SPEED  table.
    ECM MISFIRE DETECTION ENGINE SPEED

    Speed Range Engine Speed
    1 1800-3000 RPM
    2 3000-3800 RPM
    3 3800-4600 RPM
    4 4600-5400 RPM
  2. Install Land Rover TestBook and monitor ECM misfire detection system calibration and engine speed. Start engine and allow to idle at normal operating temperature. Select 2nd gear and slowly accelerate until engine revolution limiter is activated. Slowly release throttle to allow engine to decelerate through each speed range. Repeat process as necessary until calibration is complete.
  3. Check for fuel contamination, leaking or blocked fuel injector, faulty spark plugs or wires, faulty coil, low fuel pressure, low cylinder compression, or broken valve spring. When DTC repairs are completed, perform REPAIR CONFIRMATION DRIVE CYCLE "C" .
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