Diagnostics | Worthing, West Sussex
Citroen Fault Finding
Engine warning light on, an 'Engine fault: repair needed', anti-pollution or AdBlue message on the dash, or your Citroen just not running right? Our Citroen fault finding specialists at our Tarring Road garage in Worthing use dealer-level diagnostic equipment and manufacturer data to find the real cause, then explain it clearly and give you a quote before any repair work starts.
Dealer-Level Equipment
Why Choose Cedar Garage for Citroen Diagnostics?
Some garages shy away from Citroens because their wiring and electronics can be complex to follow. Our technicians work on them every day, from the C1, C3 and C4 to the C5 Aircross, Berlingo and DS3, so we know the faults these cars are prone to, from AdBlue and anti-pollution warnings to EGS gearbox faults. Accurate Citroen fault finding means going beyond the fault code, checking live data and testing sensors, wiring and components, so you only pay for the parts your car actually needs.
You get the same level of diagnostic equipment as the main dealer, including software updates and coding, with the personal service of an independent garage. We look after Citroen owners across Worthing, Goring, Ferring, Lancing and Shoreham, and we can collect your Citroen from home or work, provide a hire car while it's with us, and we'll never spend more of your money without your approval.

Citroen Warning Lights and Faults We Investigate
From an engine management light to a car that cuts out or won't select a gear, our Citroen diagnostics cover every system on your car. These are some of the most common problems we're asked to track down.
Brake & ABS warnings
ABS, ESP and electronic handbrake warnings traced to the cause.
Electrical & air con faults
Battery drain, central locking, touchscreen and air con faults.
Engine, AdBlue & anti-pollution
Engine management light, DPF, Eolys and AdBlue warnings.
Tyre pressure warnings
Warnings that won't clear, sensor faults and system resets.
Steering, suspension & gearbox
Power steering, suspension and EGS or automatic gearbox faults.
Other Citroen Services We Specialise In
Once we've found the fault, we can put it right and keep your Citroen running at its best with our other specialist Citroen services.

DVSA-Approved Testing
Citroen MOT
An engine, ABS or airbag warning light can mean an MOT failure. Our DVSA-approved testers carry out Citroen MOTs every week, and if a fault shows up we can find and fix it in the same visit.

Manufacturer Schedule
Citroen Servicing
Many faults can be prevented with the right maintenance. We service Citroens to the manufacturer's schedule using the correct oil and quality parts, and update your digital service record.

Dealer-Level Fixes
Citroen Repairs
When our fault finding pinpoints the problem, our technicians repair it to main dealer standard, from AdBlue systems and ignition faults to carbon cleaning, gearboxes and complex electrical faults.
Ready to book your Citroen diagnostic check?
Book online or call our Worthing team on 01903 248967 and we'll get to the bottom of it.
Collection & Delivery
We can collect your Citroen from home or work and bring it back once the fault has been found and fixed.
Hire Cars Available
Need to stay on the road? Ask about a hire car while we find and fix the fault on your Citroen.
Wait in Comfort
Relax in our waiting area with free Wi-Fi and a hot drink while we carry out initial fault finding checks.

Frequently Asked Questions
Citroen Fault Finding FAQs
What does Citroen fault finding involve?
We use Citroen's own diagnostic software to read any fault codes, then test the parts involved to find the real cause. We'll explain what's wrong and give you a quote before any work goes ahead.
How long does Citroen fault finding take?
Many checks can be done while you wait with free Wi-Fi and a hot drink. Some faults take longer to track down, so we'll give you an idea of timings when you book, and hire cars and collection and delivery are available.
My Citroen says 'Engine fault: repair needed'. Is it safe to drive?
If the warning light is steady and the car drives normally, you can usually drive gently, but book in soon. If it's flashing, the car has lost power or there's a red warning, stop as soon as it's safe and call us for advice.
Can you just clear my Citroen's engine warning light?
We can, but if the cause hasn't been fixed, the light will usually come back. We'll always find the reason first, so the light stays off.
What does 'Anti-pollution fault' mean on my Citroen?
It means your Citroen has spotted a problem that could affect its emissions. The car may still drive normally, but it's worth booking in for fault finding soon before it turns into a bigger repair.
My Citroen says 'Starting impossible' with an AdBlue warning. What should I do?
If topping up the AdBlue doesn't clear it, there's a fault in the system. Book in as soon as you see the message, before the countdown runs out, and we'll find the cause and fix it.
Why is my Citroen DS3 misfiring or losing power?
There are a few possible causes, such as a build-up of carbon inside the engine. Book in for fault finding and we'll find out what's causing it. If it's carbon build-up, we can clean it in house.
Why can't I select a gear on my Citroen?
Some Citroen gearboxes can refuse to select a gear or show a warning when something needs adjusting or replacing. Book in for fault finding and we'll find out what's wrong and put it right.
Do I need to go to a Citroen dealer for software updates?
No. We can carry out Citroen software updates, coding and programming here, so you won't need a separate trip to the dealer.
Will using an independent garage affect my Citroen warranty?
No. You can have your Citroen serviced and repaired by an independent garage without affecting its warranty, as long as the right parts and procedures are used, which is exactly how we work.
