TROUBLESHOOTING ENGINE 11-3 Problem Cause Solution Coolant Temperature Too Low Thermostat Temperature gauge or sending unit See your authorized dealer. See your authorized dealer. Low Engine Oil Pressure Engine oil pump or pump drive Low oil level Engine oil pressure regulation valve Plugged oil pump intake screen Plugged oil filter Oil leaks Oil diluted with fuel or coolant Engine temperature too high Wrong oil See your authorized dealer. Add oil. See your authorized dealer. See your authorized dealer. Install a new oil filter. Check for leaks. See your authorized dealer. Check cooling system. Drain oil. Use correct oil.
Engine Uses Too Much Oil Wrong oil Oil leaks Engine temperature too high Plugged air cleaner Internal engine component wear Drain oil. Use correct oil. Check engine oil drain plug. Check cooling system. Clean element or install new element. See your authorized dealer. Engine Uses Too Much Fuel Plugged or dirty air intake system Wrong fuel Fuel injection nozzles Injection pump out of time Clean air intake system. Use correct fuel. See your authorized dealer. See your authorized dealer. Excessive Black or Gray Exhaust Smoke Wrong fuel Plugged or dirty air intake or exhaust system Injection pump out of timing Injection nozzles dirty or faulty Basic engine failures Drain tank. Use correct fuel.
Clean air intake and exhaust system. See your authorized dealer. See your authorized dealer. See your authorized dealer.