Monthly Archives: June 2020

Broken Catalytic Converter On This Vauxhall Mokka.

A Vauxhall Mokka came into the garage today with its engine management light on in need of some diagnostic work to find out the reason why.

After speaking to the customer we soon found out that we were not the first Garage to look at the Mokka.

It had gone into another garage who had replaced the ignition coil pack due to diagnostic trouble codes relating to cylinder miss fires, the coil pack cured the problem and the customer left happy.

After a couple of days the engine management light came on again so back to the Garage she went.

This time the diagnostic codes related to Oxygen sensor (lambda) faults? But rather than checking live data on the scan tool or checking the sensors with an oscilloscope they proceeded to change the sensors and clearing the fault codes to turn off the engine management light.

After another couple of days the light came on again but rather than take the car back to the same garage the customer looked on Google and found us, gave us a call and got herself booked in.

Once the car was in our workshop we plugged in our Diagnostic scanner and carried out a full code scan of the vehicle, all modules were clear of codes except for the Engine Control Module (ECM) which had codes relating to ‘Oxygen sensor faults’.

We then carried out some live data testing on the Oxygen sensors to see what was happening, straight away we could see a problem, both Oxygen sensors were reading the same, this is not good!

Both Oxygen sensors showing the same pattern.

The basics of Oxygen sensors are that they read the gases which are being produced by the engine before and after the Catalytic Converter, and if the Catalytic Converter is working correctly the first sensor should be switching and the second sensor should be pretty static (on idle), if this is happening then the gases coming out of the Cat are cleaner than the gases going in to the Cat meaning lower carbon emissions.

Once we had checked the Oxygen sensors were working properly (not giving false readings) we needed to check the Cat’s internals to see why it wasn’t working.

With the Cat removed it was obvious why we were getting the same readings on our live data, the honey comb centre of the Catalytic Converter which catches and burns off the carbon from the engine had broken up and was allowing the gasses to pass by.

The Catalytic Converter had broken inside.

A new Cat was fitted and we ran another scan, this time no codes returned and the Oxygen sensors were working as they should.

Both Oxygen Sensors now reading as they should.

The customer now has a car which is working as it should, more economical and with a lower carbon output.

Aarons Autos car service garage.

Your friendly car garage in Derby

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MOT Extension ends 1st August 2020 as lockdown lifts.

The government has confirmed that it will reintroduce mandatory MOT testing from 1st August 2020 in line with gradually easing lockdown restrictions and rising traffic levels.

Drivers had been given a six month extension of their vehicles MOT certificate to discourage non-essential travel and free up garages for repair work to essential workers’ vehicles. The scheme was set to run until March 2021 but will now end in a month’s time.

The extension still applies to all MOT certificates due to expire before 1st August, but from that date onwards, drivers must have their car’s roadworthiness tested within a year of their last test. Irrespective of whether the extension applies, penalties still apply to vehicles found to be in an unsafe condition.

Book your MOT at Aarons Autos here.

Figures from the Department for Transport (DfT) show that the UK’s service sector has ramped up as restrictions on travel have eased, with more than 90% of UK garages now operating and testing capacity now at 70% of normal levels.

Baroness Vere, roads minister, said: “As people return to our roads, it is vital that motorists are able to keep their vehicles safe. That’s why as restrictions are eased, from 1st August 2020 MOT testing will again become mandatory.

“Garages across the country are open and I urge drivers who are due for their MOT to book a test as soon they can.”

Any vulnerable or self-isolation drivers are advised to contact their local garage, as many are offering vehicle collection and drop-off services to aid social distancing.

The majority of UK garages are still conducting MOT tests, and drivers are able to have their car tested voluntarily. Any MOT certificate issued after the original date of expiry will only be valid until that date the following year.

Stuart James, chief executive of the Independent Garages Association (IGA) – which has campaigned for the government to lift the extension – welcomed the announcement but expressed concern about the safety of many cars on UK roads. “This is a welcome retraction of a policy doubtless designed to provide relief to motorists”, he said. “However, this additional month will allow at least 1 million unroadworthy cars to remain on the road for an additional six months, as well as the 1.6 million dangerous vehicles that have already had their MOT extended.

“With road traffic increasing, people being encouraged to use their cars rather than public transport, and further lockdown measures easing on 4 July, we believe this additional month will leave a number of motorists with an accumulation of faults and repair costs when they are least able to afford them. Even though this scheme has only been in place for four months, it has detrimented the roadworthiness of many cars, taken away the bread and butter of the independent garage sector and left a great number of consumers confused.”

Aarons Autos car service garage.

Your friendly car garage in Derby

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Audi S1 Quattro Water Pump and Thermostat Housing Replaced.

Audi’s little S1 Quattro rocket ship has had a few problems when it comes to its cooling system, this water pump – thermostat housing has had seven re-designs since its original design due to failing water pumps and leaking joints.

Water pump – thermostat housing buried under everything!

To replace the water pump – thermostat housing on the Audi S1 Quattro is a fairly big job, we have to:

Drain the cooling system
Disconnect fuel lines and cooling hoses
Remove inlet manifold stabiliser bars
Remove the complete inlet manifold
Unbolt water pump drive cover
Remove the water pump and housing
Clean all surface faces and hose joints
Rebuild using genuine parts and all new seals
Refill with anti freeze and bleed cooling system
Road test and re-check

The water pump is driven off a small drive belt running from an internal engine shaft and should be replaced along with the water pump – thermostat housing.

New pump fitted, just got to rebuild now!

Once all the work was carried out and all final tests done the car was handed back to a very happy customer.

Aarons Autos car service garage.

Your friendly car garage in Derby

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Citroen DS3 Cooling Fan module / Resistor Fault.

This little Citroen DS3 came into us to have a look at due to the engine cooling fan running at full speed.

Firstly we carried out a Diagnostic Code Read on the vehicle, this didn’t help as it had no codes for anything let alone for the cooling fan fault!

Secondly through our Diagnostic Scanner we can operate certain modules on the engine to help us fault find, one of the modules is the high and low speed cooling fans.

When we operated the cooling fans only the high speed fan would work, this gave us a place to start, we removed the cooling fan control module to find that the resistor for the low speed fan had burnt out and required replacing.

When we rang the dealer they had six on the shelf! Always a good sign as common problem parts are always well stocked at dealerships.

Once we had replaced the cooling fan control module (resistor) we carried out another module test using our Diagnostic Scanner and it worked perfectly on low speed and high speed.

After a quick road test to make sure the fans worked with the air conditioning and when the DS3 was up to temperature it was time to hand it back to a very happy customer.

Aarons Autos car service garage.

Your friendly car garage in Derby

Give us a call at Aarons Autos for more info.

Renault TWIZY Gear Oil and Brake Fluid Change.

The Renault TWIZY is a 100% electric vehicle, consisting of a battery power source, electric motor and gearbox. It is an urban electric two-seater that is super fun to drive on warm sunny days.

This particular TWIZY came in for a few service items to be carried out to keep it in tiptop condition ready for our UK summer.

First job was the ‘Gearbox oil change’ but as the TWIZY is to small to fit on our ramps we had to carry this out on the floor using jacks and axel stands.

The Renault TWIZY’s gear box can get noisy over time due to the additives in the oil failing due to age and heat so it is advised as a service item to have it changed.

The little Renault TWIZY getting a gear oil change.

Once the TWIZY is safely up on the axel stands remove the under tray which will allow you ta see the gearbox.
Remove the 6mm allen key drain bung from the bottom of the gearbox and allow the oil to drain into a catch bowl, the drain bung has a small magnet on it which is designed to catch any small metallic filings from inside the gearbox, make sure you check for this and clean it before replacement.
Once the oil has completely drained refit the drain bung making sure to use a new sealing washer.
To refill the gearbox remove the 6mm allen key fill bung located above the drain bung (looks more like a bolt).
Fill the gearbox using either a fluid pump or gravity bottle, as the fill hole is very small it can take a while to get the oil in.
Refit the under tray, remove axel stands and carry out a road test.

Brake Fluid Change.

The second job on this little TWIZY was to carry out a full brake fluid flush, which consists of sucking the brake fluid through all four brake callipers until all the old fluid in the system is replaced with new fluid.

The reason for brake fluid changes is that brake fluid has hygroscopic properties which basically means it absorbs moisture from the air.

Brake fluid can reach some very high temperatures under heavy braking but it has a boiling point of around 250 degrees Celsius. As the Brake fluid starts to absorb moisture from the air this boiling point starts to get lower until eventually it becomes so low that even under normal braking the fluid will start to boil and cause brake fade.

This being said a lot of garages use ‘Brake Fluid Changes’ as a regular add on to a Service. We however carry out a moisture content test as part of our Service and only replace it when it is required, unless it is stated for warranty purposes of course.

Aarons Autos car service garage.

Your friendly car garage in Derby

Give us a call at Aarons Autos for more info.

Humbled by our customers response.

This was our first week back to work after having to close the business and furlough all the staff on the 31st March due to the Corona Virus and what a crazy week it has been.

In the middle of May I made the decision to re-open the garage on the 1st June and put this information on our website and social media platforms.

My initial plan was to only bring out a couple of members of the team from furlough until we had enough work to get everyone back at full pace.

The general response from our customers was amazing, we managed to fully book the first week of June within a couple of days by just using social media and e-mail, at this point I decided we would need the whole team back at work to cope with this work load so we started back on the 1st at 100%.

This was slightly worrying as in the back of my mind I thought we may just be busy for one week and then it would go quiet again and I would have to start furloughing staff again which I really didn’t want to do, how wrong was I.

Monday 1st June was our first day back and by the end of the day we had almost fully booked the following week! Once our customers had realised we were back they were booking in thick and fast, a few customers had been to other garages whilst we had been closed due to necessary repairs or break downs but then rebooked with us and wanted the work checking as they trusted our opinion implicitly.

I hope all businesses manage to return in the same way we have and start to get back to some kind of normality and hopefully get the economy rolling so we can start enjoying life again once this is all over

I would like to say a massive thank you to all of our customers new and old for sticking with us through these very hard and testing times, without whom this Covid19 pandemic may of finished Aarons Autos.

Aarons Autos car service garage.

Your friendly car garage in Derby

Give us a call at Aarons Autos for more info.