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Citroen C4 Spacetourer knock sensor replacement, made easy
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Our expert insights into knock sensor replacement
What does a knock sensor do?
The knock sensor is bolted directly onto the outside of the engine block and is used to detect vibrations and detonation “knock” noises from the engine to prevent engine damage.
What are the symptoms of a bad knock sensor?
Below are the top three symptoms that could indicate you need to replace your knock sensor:
Engine pre-detonation known as “pinking” or knocking
Reduced engine power
Increased fuel consumption
What happens when we do a knock sensor replacement on your car?
Our certified mechanics will:
Perform a diagnostic check to discover any fault codes coming from the knock sensor and other related parts of the engine.
Once they confirm that the knock sensor is faulty, they will fit a replacement knock sensor.
Once replaced, the mechanic will start the engine and recheck for fault codes.
How Fixter works
Simply book online and we'll handle the rest
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Upfront, fair pricing, with free collection & return and no hidden costs. Our in-house experts will then choose the ideal garage to work on your car.
A fully-insured Fixter driver will pick up your car, whenever and wherever works for you. (If you’d prefer to drive your car to the garage yourself, that’s not a problem!).
Our in-house experts will keep you updated, and your card is only charged once all work has been satisfactorily completed and approved by our team. Your driver will then drop the car back when it’s convenient for you.
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Want to learn more about Citroen C4 Spacetourer knock sensor replacement?
What does a knock sensor do?
The knock sensor is located on the outside of the engine block. Its job is to record knocking noise from the engine in order to prevent engine damage.
The knock sensor "listens out for" vibrations from the engine block and converts these into electrical signals. The signals are filtered and evaluated in the engine’s control unit. If the vibrations are determined to be outside of the predefined ‘normal’ limits, the engine management control unit will alter the ignition timing until it returns to within the correct limits.
Citroën
Citroën is a French automobile manufacturer, part of the PSA Peugeot Citroën Group since 1976, established over 100 years ago in March 1919.
Citroën produced the world’s first mass-produced front-wheel drive car and one of the first to feature a unitary type body, with no chassis supporting its mechanical components.
How popular is Citroën in the United Kingdom?
Citroën is probably better known for its quirky design and fun fashion styled brand of cars. Offering something different from more traditional sporty looks, they are a brand that provides value without being cheap.
There were 1.3m Citroën cars on the roads at the close of 2018; a figure that peaked in the early part of 2015 and has maintained a very similar number ever since.
Good value vehicles for family driving
Citroën offers a range of fun-looking smaller city cars and family cars for every ilk. The smallest starts with their C1 city model, growing into the C3 mini-MPV and SUV models, then the C4 subcompact and compact featuring crossover and SUV styles, up to the C5 family saloon, that is also available as an SUV sporting Citroën’s Aircross moniker. With models featuring up to 7 seats, Citroën doesn’t just create cars for everyday family motoring—they supply cars for the biggest of families.
How often should a knock sensor need replacing?
Replacing a knock sensor is not part of routine car maintenance so should only need to be fixed when it breaks or begins to fail. On most modern vehicles, the knock sensor should last over 150,000 miles or the lifetime of the vehicle.
The law, vehicle regulations and your MOT
A fault with the knock sensor will often illuminate the Engine Management Light in your car. Your vehicle will fail its MOT if your Engine Management Light remains on when the engine has been started. Under the new MOT rules, it is now classed as a major fault so will need to be fixed before a mechanic can pass your car. Therefore it’s crucial that you keep an eye out for engine warning lights and have your car inspected by one of our vetted mechanics when necessary.
What happens when we do a knock sensor replacement on your car?
Our certified mechanics will:
Perform a diagnostic check to discover any fault codes coming from the knock sensor and other related parts of the engine.
Once they confirm that the knock sensor is faulty, they will fit a replacement knock sensor.
Once replaced, the mechanic will start the engine and recheck for fault codes.
When should a knock sensor be replaced?
You should have your knock sensor looked at as soon as you notice any of the related symptoms, such as an illuminated engine warning light, reduced engine power or poor fuel economy. Because your knock sensor plays a vital role in preventing engine damage and in the safe and efficient running of your car, it’s very important to have it fixed as soon as possible.
What are the signs of a bad knock sensor?
Usually, there a few signs you can look for:
Engine pre-detonation known as “pinking” or knocking
Engine warning light comes on
Reduced engine power
Increased fuel consumption
How often should you replace your knock sensor?
Replacing a knock sensor is not part of routine car maintenance so should only need to be fixed when it breaks or begins to fail. On most modern vehicles, the knock sensor should last over 150,000 miles or the lifetime of the vehicle.
What happens during a knock sensor replacement?
During the repair our certified mechanics will:
Perform a diagnostic check to discover any fault codes coming from the knock sensor and other related parts of the engine.
Once they confirm that the knock sensor is faulty, they will fit a replacement knock sensor.
Once replaced, the mechanic will start the engine and recheck for fault codes.
What is the average life of a knock sensor?
On most modern vehicles, the knock sensor should last over 150,000 miles or the lifetime of the vehicle.
Can you drive with a broken knock sensor?
You should not drive with a bad knock sensor. If you continue to drive with a failing sensor, serious damage could be done to your engine, causing an expensive repair or replacement. As well as this a bad knock sensor will greatly reduce your cars power and fuel economy. To save yourself time and money down the line we recommend refraining from driving and getting the issue fixed as soon as possible.
Common questions about booking at Fixter
Common questions about booking at Fixter
All of our drivers are fully insured and your vehicle is always protected.
We put our drivers through rigorous vetting and training before they are able to drive your vehicle. All of our drivers must have at least 3 years of driving experience, hold a clean driver's licence, be over the age of 21, capable of driving both manual and automatic vehicles and pass a criminal background check.
Your vehicle will be assigned to a driver who is responsible for collecting it from your home, delivering it to the garage and returning your vehicle once all work is completed.
Sometimes we might coordinate with a garage for them to send their own driver to collect your vehicle. In this instance, you are protected as you would be if it was a Fixter driver.
One of our in-house mechanics will factor in the make and model of your car, as well as the work that needs doing. They will then allocate your booking to the most appropriate Fixter garage in your area, and we’ll email you to confirm.
Here’s why only 1 in 20 garages pass our selection criteria:
We only choose garages registered as a Limited Company, with a minimum of 3 years of trading.
We assess each garage's various established affiliations (e.g. Bosch / Unipart / Garage).
We perform an online audit: Fixter only selects garages with at least a 4 star customer rating.
We make sure to visit each garage in person. Our in-house mechanics evaluate the quality of equipment, staff qualifications, capacity, and technical capabilities of selected servicing centres. Fixter only works with garages which strictly use manufacturer-equivalent parts.
After all requirements are fulfilled, we negotiate preferential terms with each selected (including parts, labour, oil, and MOT test rates), so we can pass it along to our customers.
All parts used in repairs and services carried out by Fixter are either manufacturer parts or equivalent. This guarantees that only the best quality parts are used in your vehicle. We offer a 12-month warranty, meaning that should anything should go wrong with the parts or labour we’ll take care of it, free of charge.
We take your card details when you book online, but nothing is charged to your card until all the work has been approved by our in-house experts, and satisfactorily completed.
No extra work will be carried out without your consent. If additional work is required, one of our in-house experts will call you to walk through any diagnostic reports, recommendations or additional quotes from the mechanic working on your car. We check every quote to make sure the work is required and has been fairly priced.
Note: If you need to update your payment details to pay for your booking, the team will send you a secure link to add the new card details.
If your car fails its MOT at one of our garages, but you believe that your car should have passed, you'll have the option to take your car to another garage to do a new MOT test. If your vehicle passes the MOT at another garage, we’ll refund you for the original MOT test that you carried out with us. Collection and delivery fees are non-refundable.
All Fixter bookings are covered by a 12-month warranty on parts and labour.
If there’s a problem (with either parts or labour) up to 12 months after your booking date, we’ll sort it out for you, completely free of charge.
Just email support@fixter.co.uk or call our team on 0330 808 9527 and we’ll take care of it.
Note: this doesn't apply to an air con regas as leaks can occur at any time.
We understand that things change.
If you need to cancel or change your booking, please let us know asap. Our agents spend time finding you a top-rated garage, which is then booked to take care of your vehicle. In many cases, parts are ordered in advance. As a result, we operate a 72-hour cancellation policy. If you have a confirmed booking with us and need to cancel within 72 hours of the appointment, a cancellation fee of £20 may be applied.
We want to avoid that so our agents will work with you to try and find a new appointment instead. To discuss changing or cancelling a booking, please email or phone on 0330 808 9527.
Our team works Monday to Friday from 8:30 am to 5:30 pm.
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We cover all makes and models — anywhere in the UK
Popular locations
- knock sensor replacement in Stapleford
- knock sensor replacement in East Kilbride
- knock sensor replacement in Aberdeen City
- knock sensor replacement in London
- knock sensor replacement in The City of London
- knock sensor replacement in Christchurch
- knock sensor replacement in Southend
- knock sensor replacement in High Wycombe
- knock sensor replacement in Stretford
- knock sensor replacement in Dudwell
Popular services
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