Powertrain Codes

P0598

Technical Definition:

Thermostat Heater Control Circuit Low

Trouble Code: P0598
Address: 0x0598
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Thermostat Heater Control Circuit Low

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Failed Engine Cooling Thermostat
– Engine Cooling Thermostat harness is open or shorted
– Engine Cooling Thermostat circuit poor electrical connection

Specific Makes:

P0599

Technical Definition:

Thermostat Heater Control Circuit High

Trouble Code: P0599
Address: 0x0599
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Thermostat Heater Control Circuit High

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Failed Engine Cooling Thermostat
– Engine Cooling Thermostat harness is open or shorted
– Engine Cooling Thermostat circuit poor electrical connection

Specific Makes:

P0593

Technical Definition:

Cruise Control Multi – Function Input B Circuit High

Trouble Code: P0593
Address: 0x0593
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Speed Control Switch 2 Circuit High

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Speed Control Switch
– Speed Control Switch harness is open or shorted
– Speed Control Switch circuit poor electrical connection

Specific Makes:

P0594

Technical Definition:

Cruise Control Servo Control Circuit / Open

Trouble Code: P0594
Address: 0x0594
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Cruise Control Servo Control Circuit/Open

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P0595

Technical Definition:

Cruise Control Servo Control Circuit Low

Trouble Code: P0595
Address: 0x0595
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Speed Control Servo Control Circuit Low

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P0596

Technical Definition:

Cruise Control Servo Control Circuit High

Trouble Code: P0596
Address: 0x0596
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Speed Control Servo Control Circuit High

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P0597

Technical Definition:

Thermostat Heater Control Circuit / Open

Trouble Code: P0597
Address: 0x0597
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:

Possible Symptoms:

Thermostat Heater Control Circuit Open

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Failed Engine Cooling Thermostat
– Engine Cooling Thermostat harness is open or shorted
– Engine Cooling Thermostat circuit poor electrical connection

Specific Makes: