Code 89 Vauxhall Mokka: Causes & Solutions

The most common cause of the Vauxhall Mokka’s dashboard code 89 is a spanner on the dashboard for the 1.4, 1.6, or 1.7 diesel engines.

Code 89 Vauxhall Mokka Causes & Solutions

We’ll talk about code 89, its main causes, and how to reset it on your Vauxhall Mokka in this article.

What is Code 89 on a Vauxhall Mokka?

The engine control module (ECM) on the Mokka will display a code 89 if it detects an internal malfunction in the system, particularly if the thermostat is faulty.

Many factors could contribute to the problem. Since I have worked as a mechanic for quite some time, I have encountered this code before and know what to look for immediately.

What is Code 89 on a Vauxhall Mokka

In this section, we will examine the main reasons why your Vauxhall Mokka may have code 89.

Vauxhall Mokka Code 89 Causes

Faulty Thermostat

In most cases, a faulty thermostat is to blame for Code 89. It is possible for your engine to run hot or cold due to a faulty thermostat, which can lead the ECM to display a warning code because it believes something is wrong.

During engine operation, a thermostat regulates the temperature of the coolant. Your car’s thermostat closes when it’s cold to prevent hot engine coolant from entering the radiator.

Vauxhall Mokka Code 89 Causes

A warm engine allows coolant to flow through its system as soon as its valves open.

It’s not uncommon for thermostats to wear out over time, especially on Vauxhall vehicles due to normal wear and tear. The thermostat housings are plastic and can crack over time, leaking coolant.

Your Vauxhall Mokka may run hot if it has a cracked or faulty thermostat housing.

Bad O2 Sensor

Measurement of oxygen in the exhaust of an engine is done with oxygen sensors. Catalytic converters, which transform harmful emissions into less harmful ones, are located before or after them.

It may be necessary to replace one or both oxygen sensors if your Vauxhall Mokka still shows the code 82, even after you have replaced the thermostat.

What is the best way to fix Vauxhall Mokka Code 82?

You should replace the thermostat as soon as possible. The Vauxhall Mokka can be repaired at an auto repair shop or at your nearest Vauxhall dealership if you don’t want to do it yourself.

Overheating and the code 82 problem should go away if you replace the thermostat.

Your oxygen sensors may be causing the problem if your thermostat is fine. It would be a good idea to replace these as well.

Thermostats that don’t work

It’s likely you are wondering what other signs you should look for if you have a Vauxhall Mokka code 82. This code is usually caused by a bad thermostat. A bad thermostat could also show the following signs:

As the temperature gauge rises

On your Mokka dashboard, you’ll find a temperature gauge. A temperature reading that goes beyond the middle line and into the red zone indicates that your body is overheating.

Coolant Leak

It may also be a sign that your thermostat is malfunctioning if you see coolant leaking from somewhere.

Clicking Sound

You may also hear a clicking noise when your Mokka’s thermostat is going bad. The thermostat may fail to close properly, resulting in this problem. Overheating can cause damage to your engine if this happens.

How Much is the Vauxhall Mokka thermostat cost?

Depending on where you live and the make and model of your car, a new Mokka thermostat will cost you different amounts. There are a variety of prices to choose from when it comes to buying a new thermostat, ranging from $47 (£40) to $150 (£126 pounds).

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Frequently Asked Questions

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

In order to avoid potential damage and ensure optimal performance, it’s recommended that you address Code 89 as soon as possible.

Are there any common DIY fixes for Code 89 issues?

For a comprehensive diagnosis, professional assistance is recommended, such as checking the fuel system and loose connections.

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

It is important to perform regular maintenance as instructed by the manufacturer. Code 89 issues can be minimized by following the recommended schedule.

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

It does not necessarily mean that, but it does signal a problem that needs to be addressed. Professional mechanics are best suited to diagnose specific problems.

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

Your warranty documentation will tell you how this impacts your warranty. For guidance on addressing Code 89 if your vehicle is under warranty, contact your dealership.


Therefore, preventing expensive repairs and maintaining optimal performance in your Vauxhall Mokka is essential. Stay in the know, stay proactive, and make sure that your driving experience is trouble-free and enjoyable.

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