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2012 S60 T4 engine coolant bypass valve error code

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Old Apr 10th, 2021, 12:13   #1
MattLo
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Post 2012 S60 T4 engine coolant bypass valve error code

Hi Everyone

Well, I just had a thorough explanation of the issue typed out but it disappeared with the tags when I inserted the image, so the summary is below. I also can't seem to post when I input the links of forum pages I've read, nor the image of the error codes

TLDR
I am getting error codes:
P268312 "Engine coolant bypass valve 'A' control circuit high, General electrical failures, Circuit short to battery"

P126083 "Theft detected, vehicle immobilized, Bus signal/message failures, Value of signal protection calculation incorrect"

I occasionally get a "battery low" warning on the dash for both the old and new battery (I read it is a common, unfixable issue in these cars), and I believe the ugly metal rattle in the engine is the cambelt tensioner that needs replacement or something in the head gasket.

Can anyone give advice please?

Last edited by MattLo; Apr 10th, 2021 at 12:16.
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Old Apr 12th, 2021, 15:44   #2
S60RDesign
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I’m pretty sure ‘battery low’ can be fixed as when my battery was changed the car recognised it was new and stop/start started working again and the message disappeared. Does the car run ok other than the warning messages?
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Old Apr 13th, 2021, 23:51   #3
MattLo
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Quote:
Originally Posted by S60RDesign View Post
I’m pretty sure ‘battery low’ can be fixed as when my battery was changed the car recognised it was new and stop/start started working again and the message disappeared. Does the car run ok other than the warning messages?
Hmm, I've tried various googled BMS suggestions when swopping the batteries, of which none worked. I believe we would both have 652 batteries, but mine isn't stop/start like yours, so it doesn't have an AGM battery like I guess yours would - I could be wrong.

The car's take off feels sluggish or underpowered, as though the revs build up too slow or something. Not sure if this could be alternator related?
When Reversing out of my driveway, I have to go forward a tad to correct and then reverse out, and between the forward drive and reverse, I almost need to floor the accelerator and wait 3-5 seconds before "it takes" (going forward in 1st and back in reverse).
It continues for 3 minutes until I'm out of the neighbourhood, by which time I always forget as the car drives very nicely otherwise!
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Old Nov 26th, 2021, 18:35   #4
Gerry Tsawayo
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Did u get the solution to yo problem
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