P0105

P0105 on Peugeot — Rough running, blow-by from the engine and the cooling fan permanently at full speed

All the fault codes

Code P0105 indicates that the intake manifold pressure sensor signal is inconsistent with the engine's operating conditions. On the Peugeot 208 1.2 PureTech it accompanies a ruptured diaphragm in the PCV valve built into the rocker cover.

System
Fuel injection
Component
Rocker cover with integrated PCV valve
Fault
The engine runs roughly, an abnormal blow-by noise can be heard and the radiator fan stays on at full speed.
Typical symptoms
  • The engine runs roughly
  • Abnormal blow-by noise coming from the engine
  • The radiator cooling fan runs permanently at full speed
  • Service light on
  • ‘Engine fault: have the vehicle repaired’ message on the instrument cluster
Vehicles affected
  • Peugeot 208 (U) 1.2 PureTech 12v
Main code
  • P0105 Intake manifold pressure sensor - generic fault
Solution

See the repair procedure verified on Sema Repair.

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The cause and the repair are on Sema Repair

On Sema Repair this code is linked to verified case studies, with the confirmed cause case by case, the job step by step, indicative times, the manufacturer's notes and a photograph of the component with the point of intervention highlighted.