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I fitted my new dcais a few days ago all is good until after a 10 mile run this morning i get the Engine warning light on. Got the code with my DS STRATAGEM it is Po131 ox. cir .lo volt s1 .the code in the pinned message on here says it is P0131 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1) . is it the maf or something Different.

Thanks Dan
 

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Captain Slow
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16,287 Posts
Here's a little info matey.......

P0131 means the O2 oxygen sensor's voltage remained low for longer than 2 minutes. This, is interpreted by the ECM as a low voltage condition and sets the MIL.

A code P0131 may mean that one or more of the following has happened:

Faulty o2 oxygen sensor
Short to voltage on O2 signal circuit
High resistance or open on O2 signal circuit
 

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President of the Universe
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Check you've insulated all your wiring around the back of the DS induction tubing.

You need to make sure you're not trapping/snagging any of the wires to the ECU between the induction kit and the gearbox.

Remember, the gearbox/engine assembly moves A LOT when driving.

Not saying this is definitely what it is, but it is certainly somewhere to start.
 

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Check that you havent accidently pulled any connectors off while fitting the CAIS! I think that refers to the LAMDA sensor in the manifold?
 
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