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Peugeot 308 Common Problems and Solutions

Stuck in 5th Gear

Problem:

Moving from 5th gear into 4th causes the gear stick to get stuck in the 5th position.

Models affected:

Solution:

This is being caused by worn selector arms that are attached to the gearbox. It's commonly caused by a lack of oil, and if the selector arms are not too worn, then simply filling up your oil will potentially solve the problem. If the arms have become too worn, then they will need to be replaced. This can be quite a fiddly job, but it is doable, and you can buy replacement selector arms very easily here.

Difficulty level

4

Overheating Engine

Problem:

The engine is overheating even after short drives.

Models affected:

Solution:

This is common in early models of 308s and is a problem caused by the cooling system. Try bleeding the system yourself, as this will resolve the issue in most cases. If this fails, then you will need to replace the entire coolant system. This can be tricky, but it's more cost-effective to buy the system and replace it yourself than get a mechanic to do it. You can find the parts here.

Difficulty level

4

Oil Warning Light

Problem:

You know that you have plenty of oil, but your oil warning light stays on.

Models affected:

Solution:

If you have replaced the oil filter recently, the oil warning light being on all the time may simply mean that you need to use more oil due to a volume difference. Alternatively, you may simply have to reset the light. This is a very simple process, and instructions can be found in your owner's manual.

Difficulty level

1

Starting problems

Problem:

If your 308 is having problems starting when the engine is cold, it is usually down to a fault with the ECU. Does this video below sound anything like your problem?

Models affected:

Solution:

There is a software update available, which should solve the problem.

Difficulty level

5

Car pulling to the left side

Problem:

If your car has started pulling to the left side a bit, this is common on the 308. It is caused by the uneven front tyre wear, which happens due to roundabouts and near side road damage.

Models affected:

Solution:

You can change the front tyres, or first, try swapping the front tyres around which might remedy the situation.

Difficulty level

2

Anti pollution warning message

Problem:

If you have noticed that the Anti-pollution warning message has come up on the dashboard, then you have a problem with the Peugeot Emission Filter (PEF). This filter is responsible for removing any harmful particles, from the exhaust system.

Models affected:

Solution:

You may need to replace the PEF, but first try taking the car out on either a motorway or A-road, driving at about 60mph for at least 15 minutes, in order to burn off these particles. The build up occurs mostly in cars which are driven around town, as the cars do not reach high enough speeds, in order to heat up enough to burn the particles. If this does not work, then you will need to fit a replacement PEF.

Difficulty level

2

Turbo problems

Problem:

The 308 can have some issues with the turbo, which can be identified by some of the following symptoms: You may see blue or black smoke coming from the exhaust, or have a real loss of power, or even a real whistling noise coming from the top of the engine. If you have any of these symptoms, then you have a problem with the turbo in your car.

Models affected:

Solution:

You will need to get the turbo replaced, in order to resolve this issue. Make sure you replace the EGR valve at the same time, as this can be the main cause of turbo problems. However, this could be quite a costly repair.

Difficulty level

4

Part you need

EGR Valve

Part required

EGR Valve

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Fan Constantly Running

Problem:

Even when the engine is turned off, the fan continues to run for five to ten minutes.

Models affected:

Solution:

This is usually a problem caused by the coolant levels. First, check that you have plenty of coolants. If you do, then check that the coolant temperature sensor is working correctly. You may need to replace the sensor, but you can buy these very easily right here, and they are very inexpensive.

Difficulty level

2

Air Pollen Filter Warning Light

Problem:

The warning light for the air pollen filter is on.

Models affected:

Solution:

This is a common electrical fault that can be very hard to repair yourself. In some cases, it could just be a matter of cleaning or replacing the air pollen filter, but if that doesn't resolve the issue, then you will need a mechanic to check your electrics.

Difficulty level

1

Braking Power Reduced

Problem:

Braking assistance levels have dramatically dropped, which increases the risk of accidents.

Models affected:

Solution:

This was a serious problem for 308s built between 2013 and 2017 and is due to the cog belt becoming worn. Material abrasion was a common problem and resulted in a vehicle recall on all models with a 1.2-litre turbo petrol engine. You can replace the cog belt yourself for a short-term and low-cost fix, but you will need to take the car to a Peugeot dealer if you want a more long-term solution.

Difficulty level

3

AirCon Has Stopped Working

Problem:

The aircon has stopped working when needed.

Models affected:

Solution:

308s made between 2014 and 2015 had an issue with compressor failure, which stopped the aircon unit from functioning correctly. The aircon system will need to be flushed, and in some cases, replaced. While it is one of the more challenging repairs to attempt, there are YouTube tutorials available that will walk you through the process, though. It's also easy to buy a replacement aircon system from our website.

Difficulty level

4

Corroded or Fractured Sub-Frame

Problem:

The subframe on the car has become seriously corroded and may have fractured in places, affecting structural integrity and safety.

Models affected:

Solution:

This was a recall issue for 308s built in 2015 between February and March. If you notice this problem, then the only option is to talk to a Peugeot dealer. Don't ignore the problem because it will dramatically increase the risk of an accident.

Difficulty level

5

Car Alarm Going Off

Problem:

The car alarm goes off at random times for no reason.

Models affected:

Solution:

Try closing off your air vents, as this could be triggering the alarm. You can also try deactivating the interior volumetric monitoring system, directions for which will be in your owner's handbook. If the problem persists, then you will need to run a full diagnostics check to identify the cause.

Difficulty level

1

Cracked DPF

Problem:

There are cracks or holes in the Diesel Particle Filter (DPF), meaning that your emission levels are higher than legally allowed.

Models affected:

Solution:

This was caused by the spacer in the exhaust line, but only in the 308s built between 2016 and 2018. The plastic component caused damage to the DPF, resulting in holes and cracks. Those 308s that were affected by the spacer were recalled, but replacing the DPF can be relatively easy. The problem is that doing it incorrectly could lead to breaking Road Vehicle Regulations.

Difficulty level

5

Loss of Acceleration

Problem:

The time it takes to get up to speed while the accelerator is pressed down has slowed. To get up to the desired speed, it takes longer than it used to.

Models affected:

Solution:

For second-hand vehicles, it could simply be that the cruise control parameters need to be changed. This is done by resetting those parameters, which can be done by following the instructions in the owner's handbook. If the issue is a new one, especially in a new car, then a full diagnostic will need to be carried out to identify the fault codes.

Difficulty level

3

Reading these common Peugeot 308 problems should help you find out what is wrong with your Peugeot 308 – or just what to look out for in the future. We’ll also give suggestions on what to do if your Peugeot 308 does have one of these issues.