P0141 Fault code showing Lambda heater error

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My Name: Stanleysteamer

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Posts: 92
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)
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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
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My Name: Ozvtr

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Posts: 1249
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.
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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!
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