AutoCodes – MINI – P0598 MINI

P0598 MINI Code - Thermostat Heater Control Circuit Low

Quick Answer

The Engine Control Module (ECM) controls the Pulse Width Modulated (PWM) thermostat. Common causes include Failed Engine Cooling Thermostat, Engine Cooling Thermostat harness is open or shorted, Engine Cooling Thermostat circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0598 MINI indicates Thermostat Heater Control Circuit Low.
Common causes: Common causes include Failed Engine Cooling Thermostat, Engine Cooling Thermostat harness is open or shorted, Engine Cooling Thermostat circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 10,295

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 27, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0598 MINI Description

The Engine Control Module (ECM) controls the Pulse Width Modulated (PWM) thermostat. The engine coolant thermostat heater controls coolant flow and regulates the engine operating temperature. The ECM supplies 12 V to the thermostat. The ECM controls the engine coolant thermostat heater by grounding the control circuit with a solid state device called a driver. The driver is equipped with a feedback circuit that is pulled-up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.

OBDII Code P0598 MINI - Thermostat Heater Control Circuit Low - AutoCodes.com — P0598 MINI Code - Thermostat Heater Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0598 MINI?

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

How to Fix the DTC P0598 MINI?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

If there are no coolant system leaks, replace the thermostat to fix the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0598 MINI code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0598 MINI Code

1. What does the OBDII code P0598 mean on a MINI?

The P0598 code indicates a problem with the thermostat heater control circuit, specifically that the voltage is lower than expected.

2. What are the symptoms of a P0598 code in a MINI?

Symptoms may include an illuminated check engine light, poor engine heating, fluctuating engine temperature, or reduced fuel efficiency.

3. What causes the P0598 thermostat heater control circuit low code?

Common causes include a faulty thermostat heater, damaged wiring or connectors, a blown fuse, or a malfunctioning engine control module (ECM).

4. Can I drive my MINI with a P0598 code?

While the car may still run, driving with this code can lead to inefficient engine operation and potential long-term engine damage if the issue is not addressed.

5. How do I fix the P0598 code on my MINI?

Check and repair any damaged wiring or connectors, replace a blown fuse, and if necessary, replace the thermostat heater or the ECM.

6. How do I diagnose a P0598 code in a MINI?

Start by inspecting the thermostat heater wiring and connectors for damage, test the thermostat heater for proper resistance, and verify power and ground signals to the circuit.

7. What tools are needed to troubleshoot a P0598 code?

Youâ€™ll need an OBDII scanner, a multimeter, and possibly wiring diagrams specific to your MINI model.

8. Is replacing the thermostat the only solution for a P0598 code?

No, the issue could also be with wiring, fuses, or the ECM. Proper diagnosis is essential before replacing any part.

9. How much does it cost to repair a P0598 code on a MINI?

Repair costs vary but typically range from $100 to $300, depending on whether the issue is with the thermostat heater, wiring, or other components.

10. Can a P0598 code cause engine overheating in a MINI?

While itâ€™s less likely to cause overheating, the improper operation of the thermostat can lead to inefficient cooling or heating, potentially affecting engine performance.