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Error P059800 Thermostat issues

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Old

Nov 1, 2024 | 02:59 PM

#1

Kaïzer Söze

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Error P059800 Thermostat issues

The code reads: P059800 Thermostat for Map-controlled engine cooling, Short circuit to ground. And in a blue bubble under the code it says “No Fault Symptom”

Is is my third thermostat housing and thermostat so I’m guessing the issue is either the connection or the harness. Am I right to think that the wires that go to the thermostat have grounded somewhere in the engine valley or elswhere?

Any other ideas?

Thanks

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Old

Jun 1, 2026 | 04:29 PM

#2

Ego

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Re

Quote:

Originally Posted by Kaïzer Söze

The code reads: P059800 Thermostat for Map-controlled engine cooling, Short circuit to ground. And in a blue bubble under the code it says “No Fault Symptom”

Is is my third thermostat housing and thermostat so I’m guessing the issue is either the connection or the harness. Am I right to think that the wires that go to the thermostat have grounded somewhere in the engine valley or elswhere?

Any other ideas?

Thanks

Did you ever figure out the issue with the P059800? Im having the same issue and can't find any info that is useful.

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Old

Jun 1, 2026 | 04:52 PM

#3

Kaïzer Söze

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Quote:

Originally Posted by Ego

Did you ever figure out the issue with the P059800? Im having the same issue and can't find any info that is useful.

I replaced the housing and thermostat and housing. I was tired of chasing my tail.

good luck

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Old

Jun 1, 2026 | 06:59 PM

#4

Ego

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Quote:

Originally Posted by Kaïzer Söze

I replaced the housing and thermostat and housing. I was tired of chasing my tail.

good luck

Did you replace the oil filter housing with the oem mahle? Did the P059800 go away after replacement?

Thanks

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Old

Jun 1, 2026 | 07:09 PM

#5

Kaïzer Söze

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Yes. I replaced the whole housing which incorporates the oil filter housing.

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Old

Jun 1, 2026 | 07:28 PM

#6

Ego

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Thats great information. Thanks!!

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