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Home >> Land Rover >> 2012 >> LR4 HSE Lux >> Repair and Diagnosis >> Engine Mechanical >> Auxiliary Emission Control Systems >> Engine Emission Control >> Engine Emission Control V8 5.0L Petrol >> Diagnosis And Testing >> Engine Emission Control >> Symptom Chart

Symptom Chart

Symptom Possible Causes Action
Difficult to start cold
  • Battery
  • Crankshaft Position (CKP) sensor
  • Exhaust Gas Recirculation (EGR) valve stuck open
  • Fuel system
  • Evaporative emissions purge valve
  • For battery information, CKP sensor, fuel system and purge valve tests, refer to relevant workshop information section.
  • Check the EGR valve.
Engine stalls soon after start
  • Breather system disconnected/restricted
  • Engine Control Module (ECM) relay
  • Mass Airflow (MAF) sensor
  • Ignition system
  • Air filter restricted
  • Air leakage
  • Fuel lines
  • Check the engine breather hoses, PCV, etc
  • Check the ECM relay operation
  • For MAF sensor, ignition system tests, air intake and fuel line information, refer to relevant workshop information section.
Poor throttle response
  • Accelerator Pedal Position (APP) sensor malfunction
  • Throttle Position (TP) sensors
  • Engine Coolant Temperature (ECT) sensor
  • Mass Airflow (MAF) sensor
  • Transmission malfunction
  • Traction control event
  • Air leakage
  • Breather system disconnected/restricted
  • For APP, TP, ECT, MAF sensor tests, intake system checks and transmission information, refer to relevant workshop information section.
  • Check the breather system hoses, PCV, etc.