P0597 on Dodge
Thermostat Heater Control Circuit Open
P0597 on Dodge vehicles indicates thermostat heater control circuit open. Au7o has documented this code across 1 Dodge model — most commonly on Caliber. P0597 is a cooling-system code indicating an open electrical circuit in the control for the heated (electronically controlled) engine thermostat. Many modern engines use a thermostat with a built-in heater element that the computer can energize to open the thermostat sooner for better temperature management and emissions. When the PCM commands that heater but detects no electrical continuity (an open circuit), it sets this code. It generally means the thermostat heater isn't being controlled, which can affect coolant temperature regulation, fuel economy, and emissions. Typical repair costs on Dodge range from $100 to $800, depending on the specific model and root cause.
Common Causes of P0597
- •Failed thermostat heater element or integrated control thermostat
- •Open or broken wiring to the thermostat heater circuit
- •Corroded, loose, or disconnected thermostat connector
- •Blown fuse or open in the heater power feed
- •Poor ground or control-circuit fault from the PCM
- •Damaged PCM driver for the heater (rare)
P0597 on Dodge by Model
Dodge Caliber(1 issue)
- Engine Overheating - Multiple Causes2007-2012
Calibers are prone to overheating from radiator fan failure, thermostat sticking, water pump failure, and radiator clogging. Same cooling system shared with Jeep Compass/Patriot (PM/MK platform). Fan relay failure is the most common single cause.
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View P0597 across all makes →Frequently Asked Questions
What does P0597 mean on Dodge?▼
P0597 stands for "Thermostat Heater Control Circuit Open." P0597 is a cooling-system code indicating an open electrical circuit in the control for the heated (electronically controlled) engine thermostat. Many modern engines use a thermostat with a built-in heater element that the computer can energize to open the thermostat sooner for better temperature management and emissions. When the PCM commands that heater but detects no electrical continuity (an open circuit), it sets this code. It generally means the thermostat heater isn't being controlled, which can affect coolant temperature regulation, fuel economy, and emissions. On Dodge specifically, this code is documented across 1 model.
What causes P0597 on Dodge vehicles?▼
Common causes on Dodge: Failed thermostat heater element or integrated control thermostat, Open or broken wiring to the thermostat heater circuit, Corroded, loose, or disconnected thermostat connector, Blown fuse or open in the heater power feed, Poor ground or control-circuit fault from the PCM. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0597 on a Dodge?▼
Repair costs on Dodge range from $100 to $800, depending on the specific model and root cause.
Which Dodge models have P0597 documented?▼
Au7o has documented P0597 on 1 Dodge model: Caliber.