Code 89 Vauxhall Mokka: Causes And Solutions

A spanner on the dashboard of the 1.4, 1.6, or 1.7 diesel engine is the most common cause of the Vauxhall Mokka’s dashboard code 89.

In this article, we’ll discuss code 89, its main causes, and how to reset it.

What Is Code 89 On A Vauxhall Mokka?

Code 89 Vauxhall Mokka

If it detects a malfunction in the Mokka’s engine control module (ECM), particularly if the thermostat fails, it will display a code 89.

The problem could be caused by a variety of factors. Since I have been a mechanic for quite some time, I know exactly what to look for when faced with this code.

This section will explain what code 89 means and why it might occur on your Vauxhall Mokka.

Vauxhall Mokka Code 89 Causes

Code 89 Vauxhall Mokka

Faulty Thermostat

Thermostat failure is the most common cause of Code 89. The ECM may display a warning code when it believes something is wrong if your engine runs hot or cold due to a faulty thermostat.

Coolant temperature is regulated by a thermostat during engine operation. Cold weather prevents hot engine coolant from entering your radiator by closing the thermostat.

Warm engines allow coolant to flow through their systems as soon as their valves are opened.

A thermostat can wear out over time, particularly on Vauxhall vehicles due to normal wear and tear. Over time, the plastic housings of the thermostat can crack, leaking coolant.

A cracked or faulty thermostat housing may cause your Vauxhall Mokka to run hot.

Bad O2 Sensor

An oxygen sensor measures oxygen in an engine’s exhaust. Prior to or after them are catalytic converters, which reduce harmful emissions.

After replacing the thermostat on your Vauxhall Mokka, if the code 82 persists, one or both oxygen sensors may need to be replaced.

What Is The Best Way To Fix Vauxhall Mokka Code 82?

The thermostat should be replaced as soon as possible. If you don’t want to do the repair yourself, you can take your Vauxhall Mokka to an auto repair shop or to your nearest Vauxhall dealership.

Your thermostat should be replaced if you have overheating and the code 82 problem.

In the event that your thermostat is fine, it may be your oxygen sensors that are causing the problem. These should also be replaced.

Coolant Leak

If you see coolant leaking from somewhere, your thermostat may be malfunctioning.

Clicking Sound

When your Mokka’s thermostat is malfunctioning, you may also hear a clicking sound. This problem may be caused by a malfunctioning thermostat. If your engine overheats, it can cause damage.

Thermostats That Don’t Work

Having a Vauxhall Mokka code 82 may have you wondering what other signs you should look for. Bad thermostats usually cause this code. Other signs of a malfunctioning thermostat include:

As The Temperature Gauge Rises

The temperature gauge can be found on the dashboard of your Mokka. When your body temperature rises beyond the middle line and enters the red zone, you are overheating.

How Much Is The Vauxhall Mokka Thermostat Cost?

The cost of a new Mokka thermostat varies depending on your location and car model. The prices of new thermostats range from $47 (£40) to $150 (£126 pounds), so there are plenty of options to choose from.

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Frequently Asked Questions

Are there any common DIY fixes for Code 89 issues?

It is recommended to seek professional assistance for a comprehensive diagnosis, such as examining the fuel system and tightening loose connections.

How often should I perform preventive maintenance to avoid Code 89?

Maintaining your vehicle as instructed by the manufacturer is essential. Following the recommended schedule can minimize Code 89 issues.

Can I continue driving my Vauxhall Mokka with Code 89 showing?

You should address Code 89 as soon as possible to prevent potential damage and ensure optimal performance.

Does Code 89 always indicate a serious problem with the engine?

Although it doesn’t necessarily mean that, it does indicate a problem that needs to be solved. It is best to have your car diagnosed by a professional mechanic.

Is Code 89 covered by the vehicle warranty, and what should I do if it occurs?

This will be explained in your warranty documentation. You can contact your dealership for guidance on how to resolve Code 89 if your vehicle is still under warranty.


Maintaining your Vauxhall Mokka’s performance and preventing expensive repairs are essential. Stay informed, stay proactive, and ensure a trouble-free and enjoyable driving experience.

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