You’re driving and suddenly the engine failure warning light on your Citroën C4 dashboard lights up. Is it a serious breakdown? Can you keep driving or should you stop immediately? If this has happened to you, you are not alone. Many owners of Citroën C4 and C4 Picasso have experienced this issue.
In this guide, we explain what this failure means, its most common causes, and the best solutions so you can fix it without overspending.
Table of contents
What does engine failure mean in a Citroën C4?
Engine failure in a Citroën C4 can be due to multiple reasons, from a simple sensor error to serious mechanical problems. Correctly identifying the cause is key to avoiding major damage.
How to identify an engine failure in my Citroën C4?
Some signs indicating an engine failure include:
- Check Engine light on.
- Loss of power or jerking when accelerating.
- Unusual noises in the engine.
- Increased fuel or oil consumption.
- Burning smell or smoke from the exhaust.
Differences between mechanical and electronic failures (ESP, ABS, and other systems)
If the engine failure warning light comes on, it may be related to the injection, combustion, or lubrication system. However, there are other electronic systems in the vehicle that can generate similar alerts:
- ESP (Electronic Stability Program): Related to traction and stability control.
- ABS (Antilock Braking System): Indicates braking problems.
- Engine sensor failures: Such as the airflow meter or lambda sensor, which affect the air-fuel mixture.
What does engine failure mean in a Citroën C4 Picasso?
The Citroën C4 Picasso shares many of the mechanical problems of the standard C4, especially those related to the PureTech 1.2 petrol engine, where premature wear of the timing belt in an oil bath is one of the most reported faults.
Common causes of engine failure in the Citroën C4
Wear of the timing belt in an oil bath
One of the main problems of the Citroën C4 with the PureTech 1.2 engine is the premature degradation of the timing belt. This can cause:
- Residues in the engine oil, affecting lubrication.
- Failure in the distribution system, causing power loss.
- Risk of engine breakdown if the belt breaks completely.
Problems in the fuel injection system
A dirty or faulty injector can lead to:
- Difficulty starting.
- Power loss when accelerating.
- Increased fuel consumption.
Excessive oil consumption
The Citroën C4 petrol has shown in some cases abnormal oil consumption, which can result in:
- Increased risk of engine failure.
- Blue smoke from the exhaust, a sign that oil is burning.
- Need to top up oil more frequently.
Electronic failures and sensor issues
The engine management system of the Citroën C4 relies on various sensors. If any of them fail, the car may go into emergency mode or reduce its performance.
What to do if the engine warning light is on?
What does the illuminated engine light mean?
When this light comes on, the diagnostic system detects a problem in the engine or its electronic components. Depending on the colour:
- Solid red light: Serious problem, stop the car immediately.
- Solid orange light: There is a fault, but the car can continue to drive with caution.
- Flashing orange light: Ignition failure, risk of major breakdown.
Can you continue driving with the Check Engine light on?
It depends on the type of fault. If you notice jolting, power loss, or strange noises, it’s best not to continue driving and go to the official Citroën service centre.
Steps to check the engine before going to the official service centre
- Check the oil and coolant levels.
- Scan the car with an OBD2 tool to read error codes.
- Listen for unusual noises in the engine.
- Check if the car is emitting smoke from the exhaust.
How to remove the engine failure light?
Sometimes, the failure is due to a one-off error. To reset the warning light, you can:
- Disconnect the battery for 10 minutes and reconnect it.
- Use an OBD2 scanner to clear error codes.
- Check and clean engine sensors.
Solutions and repairs for engine failures in Citroën C4
What to do if the engine fails while driving?
- Stay calm and do not accelerate abruptly.
- Activate hazard lights and find a safe place to stop.
- Do not attempt to start the car repeatedly if the engine stalls.
When to go to the official Citroën service centre
If the fault persists, it is advisable to go to an authorised workshop, especially if the car is still under warranty.
Diagnosis with OBD scanner
A diagnosis at the workshop will reveal the exact error codes, allowing to pinpoint the cause of the fault accurately.
Cost of repairing engine failure in Citroën C4
Repairs can vary depending on the problem:
- Timing belt replacement: €800 – €1,500.
- Injector replacement: €200 – €600 per injector.
- Complete engine repair: Costs can exceed 7.000 €.
Can you claim against Citroën for engine failures in the C4?
If your car has a manufacturing fault, you can join a class action lawsuit to demand compensation.
FAQs about engine failure in Citroën C4
What are the most common problems in the Citroën C4?
- Timing belt failure.
- Excessive oil consumption.
- Issues in the injection system.
How can I prevent future engine failures in my vehicle?
- Oil change every 10.000 km.
- Check the timing belt before 60.000 km.
- Use fuel and oils recommended by Citroën.
Can I join a class action lawsuit if my Citroën C4 has this issue?
Yes, if your car has experienced an engine failure, you can claim compensation.
If your Citroën C4 has experienced engine failures, follow these steps and avoid costly repairs. Keep your vehicle in good condition and claim if necessary.