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Want To Avoid Replacing Your O2 Lambda Sensor?

Carbon Cleaning is your best option


faulty O2 lambda sensor

What is the purpose of the O2 / Lambda sensor?
The O2 (Oxygen) Sensor or Lambda Sensor as it is known in the trade is located before the Catalytic Converter in the exhaust system.


The job of this probe is to measure the amount of oxygen left in the remaining burnt gases as they exit the engine and send this information to the ECU (Engine Management Unit). The ECU can then calculate the correct fuel / air mixture for the ideal combustion which lowers fuel consumption and in turn, reduces emissions. This is important for passing MOT and roadside emissions tests.
More recent regulations require a second 02 sensor to be positioned after the Catalytic Converter so that the effectiveness of the converter can be measured.

Why should the Lambda / 02 Sensor be replaced?
If the sensor is faulty it will send incorrect readings to the ECU and therefore the calculated air to fuel ratios will be incorrect. This will cause the engine to stutter, run lumpy, and increase fuel consumption.

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What Our Customers Say

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10
Posted 6 October 2026

High Standard of work

Just to say Matts work was to a high standard. He arrived early, focused on the task and did a great job. He completed all tasks required and ran a thorough check afterwards. Very reassuring! A genuine technician and people person. I have no concerns recommending Matt and his company.

Verified reviewer
Job location: KT22 Checkatrade
★★★★★

Booked Winston in today for a swirl flap bypass , one of the most genuine mechanics I've met . After his diagnosis, explained about the split intercooler pipe ( somthing my local garage could not discover ) and best to fix that first before proceeding with swirl flaps . Best £90 ive ever spent . I may need him again after fix of intercooler pipe for the bypass , but a big thank you for your honesty .

RH
Ryan Hague Sep 25, 2026
Trustpilot

Excellent service

I was really impressed with the information Jason provided me with. Nice to come across an honest company who put customers first! Highly recommend.

10
Posted 8 November 2025

Job well done

Thank you Matt, Arrived bang on time carried out arranged work to my Audi and a bit more and some great advice .

Verified reviewer
Job location: RH10 Checkatrade
★★★★★

Very professional job done by Matt. First day the car didn’t delete for some software issue but he promptly came over to re-do the job to make sure everything worked properly next day.

AM
Alan Moore Sep 22, 2026
Trustpilot

I had Technician Cristian Nicolaie come…

I had Technician Cristian Nicolaie come to my home on Friday morning to diagnose and clean my DPF filter and remove carbon build-up from the engine. From the moment Cristian arrived, he was polite, friendly and professional. He asked me a few questions about the car, explained what he was going to do and talked me through the possible cause of the problem. He also gave me some really useful advice on how to help prevent the problem from happening again. Cristian carried out the work professionally and got the car back to normal. The diagnostic test afterwards showed that everything was working as it should. What made this even more important to me was that I was due to go away that day and had to tow my caravan. After speaking with Cristian, he gave me complete confidence that the car was going to be okay — and he certainly didn’t disappoint. I towed my caravan with no problems at all, and the car performed perfectly. I live in the BS15 area, and I would have absolutely no hesitation in recommending Cristian Nicolaie to anyone experiencing problems with their car. If the other technicians within the company have the same level of professionalism, knowledge and customer service as Cristian, then I would happily recommend the company as well.

★★★★★
10/10
Read all reviews →
10
Posted 6 October 2026

High Standard of work

Just to say Matts work was to a high standard. He arrived early, focused on the task and did a great job. He completed all tasks required and ran a thorough check afterwards. Very reassuring! A genuine technician and people person. I have no concerns recommending Matt and his company.

Verified reviewer
Job location: KT22 Checkatrade
10
Posted 8 November 2025

Job well done

Thank you Matt, Arrived bang on time carried out arranged work to my Audi and a bit more and some great advice .

Verified reviewer
Job location: RH10 Checkatrade
10
Posted 14 August 2025

Full Carbon Clean and remap

I had the pleasure of meeting Matt today. He was on time, gave great advice, honest feedback, great sense of humour - everything you would want from your technician. Never makes you feel stupid. Explained how the remap works. I'm only disappointed he didn't take a picture of my car for his portfolio.

Verified reviewer
Job location: SL9 Checkatrade
10
Posted 9 June 2025

Cleaned DPF and engine very sufficient. Very happy with the service highly recommended.

Cleaned DPF and engine very sufficient. Very happy with the service highly recommended.

Verified reviewer
Job location: RH12 Checkatrade
10
Posted 9 June 2025

Egr issue resolved on my Audi in Kent

Very good and efficient

Verified reviewer
Job location: ME1 Checkatrade
10
Posted 20 May 2025

DPF and egr clean and reset

Great advice from Cristian the technician who advised and then did the job very well thank you very much.

Verified reviewer
Job location: NP44 Checkatrade
★ ★ ★ ★ ★
4.5/5
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RH
Ryan Hague Sep 25, 2026
Trustpilot

Excellent service

I was really impressed with the information Jason provided me with. Nice to come across an honest company who put customers first! Highly recommend.

AM
Alan Moore Sep 22, 2026
Trustpilot

I had Technician Cristian Nicolaie come…

I had Technician Cristian Nicolaie come to my home on Friday morning to diagnose and clean my DPF filter and remove carbon build-up from the engine. From the moment Cristian arrived, he was polite, friendly and professional. He asked me a few questions about the car, explained what he was going to do and talked me through the possible cause of the problem. He also gave me some really useful advice on how to help prevent the problem from happening again. Cristian carried out the work professionally and got the car back to normal. The diagnostic test afterwards showed that everything was working as it should. What made this even more important to me was that I was due to go away that day and had to tow my caravan. After speaking with Cristian, he gave me complete confidence that the car was going to be okay — and he certainly didn’t disappoint. I towed my caravan with no problems at all, and the car performed perfectly. I live in the BS15 area, and I would have absolutely no hesitation in recommending Cristian Nicolaie to anyone experiencing problems with their car. If the other technicians within the company have the same level of professionalism, knowledge and customer service as Cristian, then I would happily recommend the company as well.

MS
MR SHANE SMITH Sep 6, 2026
Trustpilot

Ukcc auto techs Christian attended my…

Ukcc auto techs Christian attended my property to diagnose my van which had dpf issues and a ad blue problem. Christian was very informative explaining what was happening with my van. Christian then proceeded to clean the dpf and the ad blue fault was very professional explaining the process at all times. I would recommend Christian to anyone who has problems with there dpf or any ad blue faults thanks again Shane

AG
Ariane Grimshaw Aug 21, 2026
Trustpilot

Extremely happy with the service…

Extremely happy with the service Cristian provided - he was knowledgeable, professional and efficient. Would highly recommend!

KI
Kirsty Aug 20, 2026
Trustpilot

I had a stage 3 clean done today

I had a stage 3 clean done today. The gentleman was very polite and knowledgeable. Very good service. Would recommend to others.

RR
robert righton Aug 20, 2026
Trustpilot

Christian DPF repair

Christian arrived as planned and was very helpful in explaining the diagnostics and what was needed Repair work carried out promptly I had a further issue later in day and Christian met me in evening to sort that issue also at no extra cost Highly recommend him and will be using him again if needed Rob

★★★★★
4.4/5
Read all reviews →
★★★★★

Booked Winston in today for a swirl flap bypass , one of the most genuine mechanics I've met . After his diagnosis, explained about the split intercooler pipe ( somthing my local garage could not discover ) and best to fix that first before proceeding with swirl flaps . Best £90 ive ever spent . I may need him again after fix of intercooler pipe for the bypass , but a big thank you for your honesty .

★★★★★

Very professional job done by Matt. First day the car didn’t delete for some software issue but he promptly came over to re-do the job to make sure everything worked properly next day.

★★★★★

Thank you for the 5-star rating, Thomas! We’re delighted you had a great experience and appreciate your support. We look forward to welcoming you back soon.

★★★★★

best work ...

★★★★★

Thank you Christian being so prompt in coming to fix and diagnose the problem I have with my vehicle , service was very prompt with excellent knowledge behind him . I would definitely recommend Christian 100% . Will definitely recommend and use him again . Thankyou for your help

★★★★★

Perfect job thank you so much

o2 Lambda Sensor Cleaning Options

Choose the best option for your vehicle

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1-Stage Carbon Cleaning

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Our world class Hydrogen generating machine pulses Hydrogen and Oxygen into the engine which upon contact with dry hardened carbon will burn it back into it's hydrocarbon state (a gas) so that it can exit safely through the exhaust system. Includes FREE dealer leval diagnostics scan.
For more information please view How Carbon Cleaning Works

Recommended for: Those who use our Carbon Cleaning Services annually or every 10,000 to 12,000 miles.


Price: £119.99


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Hydrogen Engine Carbon Cleaning
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2-Stage Carbon Cleaning

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As per our Stage-1 service but with our unique Injector Cleaner. As Hydrogen is introduced into the engine through the air intake the injectors are the one component that this form of cleaning cannot reach. Therefore here are UK Carbon Cleaning we’ve developed our own injector cleaner solution. This is administered through the fuel system to work in conjunction with the Carbon Cleaning. Clean injectors makes for better atomisation of fuel and therefore closer to complete combustion is achieved which in turn means less carbon build-up! Includes FREE dealer level diagnostics scan.

Recommended for: Petrol vehicles without a turbo.



Price: £149.99


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Stage-3 Carbon Cleaning

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As per our Stage-2 service plus our own branded chemical carbon cleaner solution that is designed to work in conjunction with the Hydrogen Carbon Cleaning. This unique chemical was developed when we realised that despite Hydrogen having some amazing results there are some limitations. Some carbon build-up retains moisture (mainly oily residues) which restricts the Hydrogen from interacting with the carbon as well as it could. This chemical is designed to burn as much of this oily residue away and dry out what is left so that thereafter the Hydrogen cleaning can produce even better results.

Recommended for: Petrol turbo and all diesel engines.


Price: £179.99


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Stage-4 Carbon Cleaning

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As per our Stage-3 service plus our own UK branded DPF chemical solution designed to aid a Diesel Particulate Filter to burn soot at temperatures as low as 300c (usual regeneration temperatures are >600c). This is a preventative solution to prevent DPF clogging and increase the lifespan of the DPF. NOTE: This is not a replacement DPF Cleaning

Recommended for: Diesel vehicles with a DPF unless they do not run ad-blue.


PLEASE NOTE: THIS IS NOT A DPF CLEAN, FOR THAT PLEASE VISIT OUR DPF CLEANING SERVICE PAGE


Price: £209.99


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When should the Lambda / 02 Sensor be replaced?

As long as it’s not shortened by other engine malfunctions the average lifespan of an 02 sensor is 80,000 to 90,0000 miles.

Exhaust leaks can damage the sensor probe which can lead to dangerously high temperatures. The probe can also become contaminated by unburned fuel, if this occurs it is irreversible.

Following a strict servicing routine, including the usual oil changes, spark plugs, air filters etc, is required to ensure maximum life of the sensor.

Signs that your Lambda / O2 Sensor needs to be replaced:

The engine starts to stutter or suddenly suffers from reduced performance

The check engine management light illuminates

The easiest way to diagnose a faulty Lambda / 02 sensor is with an OBD (On-Board Diagnostic computer). Unless you have access to an OBD reader and are competent in using one this should be completed by a professional.

Typically garages charge up to £70 for such a diagnostic, alternatively, we include a FREE diagnostic with all of our Carbon Cleaning Services starting from just £89.99

Cleaning your Lambda Sensor / O2 Sensor?

There are numerous ways to clean or replace the Lambda Sensor / 02 Sensor with varying prices.

The costliest option is a complete replacement part. Most mechanics will recommend this – Why? It’s generally their only solution. The price of a Lambda / O2 sensor varies on average between £180 and £300. NOTE: Newer vehicles have two sensors and it’s not uncommon that if one has been damaged the other will have been as well


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Upon approval* your invoice is split into 3 equal payments . The first payment is processed on the debit card immediately and you are back on the road. The balance will be split over 2 further monthly payments.

Example: Invoice value £390 divided by 3 = 3 x £130 payments 0% Interest.

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Faq

Depending on the level of service chosen our engine carbon cleaning service takes a total of 45-60 minutes.

Carbon cleaning is not as such a fix, it’s original purpose is cleaning as a preventative measure as carbon build-up is the root cause of 85% of the failure of components. If your vehicle is suffering from an o2 lambda sensor issue it may be just dirty, carbon cleaning is a simple and cost-effective way to ascertain if it can be cleaned. If not the sensor must be replaced and then we recommend following up with our carbon cleaning service to ensure any excessive carbon build-up in the engine caused by the sensor fault does not cause any further expensive faults.

You cannot clean too much but we recommend preventative cleaning once a year, or every 10-12,000 miles – just like a regular oil change but for the air and fuel side of your engine - little and often is the key and as the saying goes… ‘An ounce of prevention is worth a pound of cure!

Certainly not. We are a worldwide brand with CE marked machines, operating in over 50 countries with 100’s of machines being used daily – never has there been an engine damaged from our engine carbon cleaning process.

We would not take any risks with your vehicle, so for piece of mind UKCC Auto Techs guarantee to you that all our technicians are trained to the highest standards and are independently fully insured.

No, this process is totally safe and untraceable.

Yes, we offer multi-service and multi-vehicle discounts.

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