Description
Summary: P0606, C1404 and C1414 point to the electric power steering unit when Citroen C4 Picasso power steering loses its assistance — the wheel turns heavy and the EPS warning light comes on. We bench-test and repair your 2006–2013 C4 Picasso’s own unit, with a lifetime, unlimited-mileage warranty.
- Model years: C4 Picasso, 2006–2013
- Lamp: EPS warning light
- Diagnostic codes: P0606, C1404, C1414
What changes at the wheel
- Assistance lost completely, at first only now and then
- Heavy wheel when parking or manoeuvring
- EPS warning light lit
- P0606 (internal fault), C1404 (power steering control fault) or C1414 (power steering motor internal fault) on a scan
Nothing mechanical has failed, so the C4 Picasso still steers — with real effort, and assistance can drop out mid-manoeuvre. Do not leave it.
Why a cleared code comes straight back
A scan tool can wipe P0606 or C1404, but the fault is still in the unit, so code and light return once it recurs. Heat, repeated load — highest at parking speed — and age wear its control electronics down until a fault is logged and assistance is withdrawn.
A weak battery or poor connection can cause the same heavy steering, so have the supply checked before anything comes off the car.
What happens to your unit
We receive the unit from your garage once it is off the car. Our Hardware-in-the-Loop rigs recreate driving heat and load, so the fault is reproduced, repaired and re-measured against specification. Any steering calibration after refitting is simply part of the fit.
More on C4 Picasso power steering
Does P0606 always mean the steering unit?
Not on its own. P0606 is a general internal-fault code, so check which module logged it. When the power steering reports it, alongside C1404 or C1414, heavy steering and the EPS light, the electric power steering unit is the likely cause.
Why does assistance come back, then fail again?
Intermittent loss is a common early pattern: the electronics cope while conditions suit them and give up under heat or load. The dropouts tend to become permanent, so it is worth acting while the fault is still occasional.
C4 Picasso, 2006–2013
Your Picasso’s own steering unit, repaired
Hardware-in-the-Loop tested · Same unit returned · Lifetime warranty
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