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Home >> Nissan-Datsun >> 2003 >> Frontier Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0217: Coolant OVERTEMPERATURE Enrichment Protection >> Main Causes Of Overheating
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Main Causes Of Overheating

  1. Turn engine off. Perform the following:
    • Check for blocked radiator, condenser, radiator grille and bumper blocking airflow.
    • Using coolant tester, check coolant mixture. Mixture should be 50-50.
    • Check coolant level.
    • Using pressure tester, check radiator cap. Pressure should be 11-14 psi (78-98 kPa).
  2. Start engine. Run engine at 3000 RPM for 10 minutes. Perform the following:
    • Check for coolant leaks.
    • Check for thermostat opening by touching upper and lower hoses. Both hoses should be hot.
    • On 3.3L models, check cooling fan.
  3. On all models, turn engine off. Using chemical color tester or 4 gas analyzer, check for combustion gasses in cooling system.
  4. Drive at 55 MPH for 30 minutes and then let engine idle for 10 minutes. Temperature gauge should remain at less than 3/4 when driving. Ensure coolant does not overflow from reservoir tank.
  5. Turn engine off. Allow vehicle to cool for one hour. Check for coolant level in reservoir tank to return to initial level.
  6. If no other problems are found, check cylinder head for warping. Maximum warpage is 0.004" (0.1 mm). Check cylinder walls and pistons for scuffing.
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