MajorCommonTransmission

Citroen C4: AL4 4-speed automatic harsh shifts and limp mode (petrol autos)

AL4 4-speed automatic harsh shifts and limp mode (petrol autos) is a common transmission fault on the Citroen C4 on the 2005–2011 cars, and we rate it major. Putting it right costs $600 to $3,000 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 8 documented faults on the Citroen C4.

Vehicle: Citroen C4
Years: 2005–2011
Fuel: petrol
Gearbox: auto
System: Transmission

This page covers the Citroen C4 as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Citroen C4 faults8 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph of the Mechatronic / valve body yet. We would rather show none than show a picture of a different part.

What goes wrong

Conventional-automatic petrol C4s of this era use the AL4 4-speed, with its well-earned reputation for harsh shifting and 3rd-gear limp mode caused by failing pressure-regulation solenoids and old fluid. The repair (later-spec solenoids, fluid and a mandatory software update) is affordable at an independent, but a long-neglected box can need a valve body or replacement. The fault usually appears once the box is hot, so short test drives hide it.

What you would notice

Harsh thumping shifts once warmed up
'Gearbox fault' message, stuck in 3rd gear
Jolt when stopping
Delayed engagement of Drive/Reverse

How to check it

Where to look. Automatic transmission, transverse on left side of engine bay

Drive for at least 20 minutes of town running so the transmission is fully hot, then judge the shifts.
Any gearbox message during the drive is disqualifying at the asking price.
Ask when the fluid and solenoids were last changed.

Parts involved: Mechatronic / valve body.

What it costs to put right

$600 to $3,000 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“Has it ever gone into limp mode?”
“When was the transmission fluid last changed?”
“Were the updated solenoids ever fitted?”

Now check the Citroen C4 you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in the sources below. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them.

PistonHeads thread 'Citroen C4 1.6 HDI Automatic Gearbox Fault'
French Car Forum thread 'Citroen C4 automatic gearbox problem'
Honest John forum C4 gearbox threads

Citroen C4 buyer questions

Is al4 4-speed automatic harsh shifts and limp mode (petrol autos) serious on a Citroen C4?

We rate it major and common on the Citroen C4. Conventional-automatic petrol C4s of this era use the AL4 4-speed, with its well-earned reputation for harsh shifting and 3rd-gear limp mode caused by failing pressure-regulation solenoids and old fluid. The repair (later-spec solenoids, fluid and a mandatory software update) is affordable at an independent, but a long-neglected box can need a valve body or replacement. The fault usually appears once the box is hot, so short test drives hide it.

How much does it cost to fix on a Citroen C4?

$600 to $3,000 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Citroen C4 years are affected?

Our research records this fault on the 2005–2011 Citroen C4. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.

How do I check for it before I buy?

Drive for at least 20 minutes of town running so the transmission is fully hot, then judge the shifts. Any gearbox message during the drive is disqualifying at the asking price. Ask when the fluid and solenoids were last changed. Look here: Automatic transmission, transverse on left side of engine bay