PowertrainP0599

Caution

Severity: Caution - get it checked when you can

Thermostat Heater Control Circuit High

33 brands affected · Generic SAE J2012 description.

Key terms: SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

This range covers vehicle speed, idle and oil-pressure control, charging-system voltage, and brake-switch circuits.

2Common causes

Carbon build-up in the throttle body
Faulty idle air control valve
Faulty vehicle speed sensor
Faulty charging system or weak battery
Wiring or connector fault

3Can I drive?

Caution · drive with care

Codes in this range include oil-pressure, brake-switch and charging-system voltage faults. If the oil-pressure warning light is on, stop the engine as soon as it is safe and do not drive until it is diagnosed. If the battery or charging warning light is on, drive straight to a workshop: the car can stall when the battery runs flat. For any other P05 code, have the car diagnosed promptly rather than continuing to drive.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 33

Brand	Code	Description	System
Ashok Leyland CV	P0599	Thermostat Heater Control Circuit High SAE	Powertrain
BAIC Motor	P0599	Thermostat Heater Control Circuit High Brand	Powertrain
Mercedes-Benz	P0599	Thermostat Heater Control Circuit High SAE	Powertrain
BMW	P0599	Short circuit to positive Brand	Powertrain
BYD	P0599	Thermostat Heater Control Circuit High Brand	Powertrain
Chery	P0599	Thermostat Heater Control Circuit High Brand	Powertrain
Daewoo	P0599	Thermostat Heater Control Circuit High Brand	Powertrain
DFFS	P0599	Controlled thermostat control failure Brand	Powertrain
DFFX	P0599	Thermostat Heater Control Circuit High Brand	Powertrain
DFXK	P0599	Thermostat Heater Control Circuit High Brand	Powertrain
EOBD	P0599	Krug grejača termostata visok Brand	Powertrain
Geely	P0599	Thermostat Heater Control Circuit High Brand	Powertrain
GM	P0599	Thermostat Heater Control Circuit High Brand	Powertrain
Great Wall	P0599	Thermostat Heater Control Circuit High Brand	Powertrain
Hafei	P0599	Thermostat Heater Control Circuit High Brand	Powertrain
Holden	P0599	Engine Coolant Thermostat Heater Control Circuit High Voltage Brand	Powertrain
Honda	P0599	Thermostat Heater Control Circuit High SAE	Powertrain
Hyundai	P0599	Thermostat Heater Control Circuit High SAE	Powertrain
Isuzu	P0599	Thermostat Heater Control Circuit High SAE	Powertrain
Land Rover	P0599	Thermostat Heater Control Circuit High SAE	Powertrain
Mitsubishi	P0599	Thermostat heater circuit high Brand	Powertrain
Opel	P0599	Thermostat Heater Control Circuit High Brand	Powertrain
Peugeot	P0599	Thermostat Heater Control Circuit High SAE	Powertrain
Porsche	P0599	Thermostat Heater Control Circuit High SAE	Powertrain
Proton	P0599	Thermostat heater circuit high Brand	Powertrain
Saab	P0599	Thermostat Heater Control Circuit High Brand	Powertrain
MG (SAIC)	P0599	Thermostat Heater Control Circuit High Brand	Powertrain
Sprinter	P0599	Thermostat Heater Control Circuit High SAE	Powertrain
Suzuki	P0599	Thermostat Heater Control Circuit High Brand	Powertrain
SWM Motor	P0599	Electronic thermostat heating control circuit high voltage Brand	Powertrain
Tata	P0599	Thermostat Heater Control Circuit High Brand	Powertrain
Toyota	P0599	Electronic thermostat heating control circuit voltage is high Brand	Powertrain
Volkswagen	P0599	Thermostat for mapped engine cooling (F265): short to ground; Defective Brand	Powertrain

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Extended variant codes 1

These 7-character codes are manufacturer-specific variants of P0599 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P059900	Der Kühlmittelthermostat hat Kurzschluss nach Plus. Brand	Powertrain

6Related codes

Browse Pxxx codes or P059xx codes.