Fault code P0217 – a step-by-step guide to diagnosing and fixing it

Error code P0217 is displayed and the check engine light is on - what does this mean?

DTC P0217 is triggered by the OBD system when the engine temperature exceeds critical values and overheating is detected. This fault code relates to the engine cooling system and temperature monitoring. For various manufacturers, this trouble code can also be referred to as "Engine Overtemperature Condition" or "Engine Overheating".

What causes can this fault code have?

• Defective thermostat
• Clogged or leaking radiator
• Defective water pump
• Low coolant level
• Defective radiator fan or fan motor
• Blocked cooling ducts in the engine
• Damaged cylinder head gasket
• Defective coolant temperature sensor
• Clogged radiator grille area
• Defective coolant thermostat housing

What symptoms occur in parallel with fault code P0217?

• Overheating warning: Temperature display in the red range or warning light active
• Loss of power: Engine goes into emergency running mode or reduces power automatically
• Vapor development: Visible vapor from the engine compartment
• Loss of coolant: Visible puddles under the vehicle
• Unusual noises: Knocking or rattling engine noises
• Automatic engine shutdown: Engine switches itself off for protection

How to fix the problem of error code P0217?

• The repair requires a systematic check of the entire cooling system to identify and rectify the cause of overheating.
• Check and top up the coolant level: Check the coolant reservoir and top up with the correct mixture of coolant and distilled water if the level is low, while completely bleeding the cooling system
• Replace thermostat: Replace defective thermostat with a new component, drain coolant, open thermostat housing and refill and bleed the system after installation
• Replace the water pump: If the water pump is defective, replace it completely, which usually also requires replacing the timing belt or timing chain
• Clean or replace the radiator: Have a clogged radiator professionally flushed or replace it completely if it is irreparably damaged
• Repair radiator fan: Replace defective fan motor, fan relay or the corresponding fuse and check the electrical connections
• Replace cylinder head gasket: If the head gasket is defective, have a complete engine repair carried out, as this is a major operation