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Old 11-27-2015, 07:27 AM
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P0598 - it just never ends, huh?

Hi guys, i have just replaced VCG and CCV kit, installed throttle body gasket, Intake Elbow (was not bad actually) and cleaned Mass AirFlow sensor while I was at it, p171/174 stopped showing up but in a few days, in the morning, just as I start the X, SES lights up, according to Torque, it is P0598 code, anyone has any idea what it is/how to troubleshoot? Thanks in advance.
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Old 11-27-2015, 07:32 AM
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I still have O2's sensors, while exsisting ones seem to operate, I read that they become lazy with time, should I throw them in? Car @ 125k miles.
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Old 11-27-2015, 07:55 AM
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Had this on my E39 - replaced my TStat. It's got a heater element in it, they go bad.
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Old 11-27-2015, 08:52 AM
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P0598: open or short thermostat heather control circuit. Check the connections.

Quote:
Originally Posted by Roman D View Post
I still have O2's sensors, while exsisting ones seem to operate, I read that they become lazy with time, should I throw them in? Car @ 125k miles.
I usually replace them at 100k miles as preventative maintenance
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Old 11-27-2015, 12:07 PM
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P0598 BMW Thermostat Heater Control Circuit Low OBDII Engine Light Trouble Code | AutoCodes.com

Stay away from those Wing Wang cheap thermostats on eBay and Amazon. Replace it with an OE or OEM Thermostat.
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Old 11-27-2015, 12:11 PM
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Guys thank you very much, where is it located?
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Old 11-27-2015, 12:19 PM
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sensational resource. thanks for that trouble codes webpage.
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Old 11-27-2015, 12:46 PM
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Quote:
Originally Posted by Roman D View Post
Guys thank you very much, where is it located?
Check the electronic connector on the T-stat housing and make sure it clips all the way in. I think it wasn't make good enough contact. Did you disconnect it when working on the car?
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Old 11-27-2015, 01:28 PM
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I don't think I did disconnected it but can't be sure, thats why I asked where it is located since I don't know name of everuthing I touched yet.
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Old 11-27-2015, 01:29 PM
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Guys, should I do O2's just because?
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