P0598 Code - Thermostat Heater Control Circuit Low

What Does P0598 Mean?

Is the fuel pump sometimes not priming when you turn the key to ON(II)? Start by measuring the fuel pressure and checking whether you have bright white-bluish spark at all four plugs. The mechanical timing is also something that you should check, as we mentioned above. When you see P0598 engine fault code on your engine code reader this description will help you.

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What are the common causes of P0598 ?

The P0598 code has a number of common causes:

• Faulty or corroded wiring around the thermostat
• Faulty or corroded wiring between powertrain control unit and thermostat
• Low coolant levels
• Faulty thermostat
• Faulty powertrain control module

How do you troubleshoot P0598 ?

If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

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