P0141 Fault code showing Lambda heater error

Questions specifically about a Petrol powered Citroen C3 (usually engine or fuel related problems).
Forum rules
One question per topic.
Petrol engine related faults, like injectors, error codes, overheating.
You can post more topics if necessary, but only one question per topic.
My Name: Stanleysteamer

Experienced Member
Posts: 68
Joined: Wed Sep 20, 2017 9:59 pm
Model: C3 Pluriel - with or without roof
Year: 2004 (54)
Engine Size: 1.6 (16v)
Fuel Type: Petrol
Mileage: 50000
Trim Level: NA
Gearbox: SensoDrive
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU5 16-valve (110 PS)
Has thanked: 1 time
Been thanked: 3 times

Post

Hi guys
I have this fault code P0141
Have ordered a new O2 Lambda sensor post exhaust
Anything else I should know
Pluriel 54 1600 engine
Cheers
Stan
User avatar
My Name: Ozvtr

Moderator
Posts: 940
Joined: Wed Jul 10, 2019 3:31 am
Model: C3 2002-2005, Original shape model
Year: 2003 (53)
Engine Size: 1.4 (8v)
Fuel Type: Petrol
Mileage: 80000
Trim Level: Other
Gearbox: Automatic PRND
DPF: No
LHD or RHD: RHD
Engine name: TU3 (75 PS)
Location: Brisbane, Australia.
Has thanked: 36 times
Been thanked: 251 times

Post

Because of the relatively high current drawn by the heaters you can have problems with the contacts in the connectors.

Have you tried swapping the blue and green connectors over? If your fault moves from the down stream to up stream sensor then its the down stream sensor itself. If it doesn't, it might be the connector at the engine ECU or BSM. The BSM provides power and the engine ECU provides the ground.

The heater circuit is not critical (for the downstream sensor) and I don't think it brings on the engine light? The engine ECU wont be looking at the downstream sensor until the engine management system goes into closed loop mode anyway so the heater is virtually redundant. BUT...if you are like me, you want every thing shipshape and Bristol fashion. LOL!
  • Similar Topics
    Replies
    Views
    Last post