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Home >> Jeep >> 2019 >> Renegade High Altitude, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1381 (1.3L - DTCS P0521 To P0780) >> DTC Troubleshooting >> P0599-Thermostat Heater Control Circuit High >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
ELECTRIC HEATED THERMOSTAT CONTROL CIRCUIT SHORTED TO VOLTAGE
ELECTRIC HEATED THERMOSTAT
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  . 

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