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3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

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Old 01-15-2006, 04:56 PM   #1 (permalink)
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SES Code Readout - P0128

Thanks for the tips guys. Went to AutoZone and they read it right out for free...I was apprehensive to go at first, but I'm glad I did, I highly recommended it first a first-cut diagnosis.

Anyways, the fault code was "P0128". The description was, "Coolant Temperature below Thermostat Regulating Temperature." The service tech tells me, "you know someone was just in here and had the same code...that tells me it's too f'in cold out"...he says. He said it was okay and not to worry about it...what do you guys think?

As it turns out, once I started the car to leave Autozone, the SES light was cleared out. I wonder if maybe the guy reset it?
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Old 01-15-2006, 05:03 PM   #2 (permalink)
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Yea most likely the guy reset the code.

As for the code it self.. how cold are you talking?

You might need more anti freeze than what is in the mixture.

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Old 01-15-2006, 06:38 PM   #3 (permalink)
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Originally Posted by 97alpineM3
Yea most likely the guy reset the code.

As for the code it self.. how cold are you talking?

You might need more anti freeze than what is in the mixture.

Les

I double-checked, he didn't reset the code. Didn't give info on how cold the temp was though. Engine temp is nominal though on the gauge.

I'll keep an eye to see if the light comes back on. Should I rush to the dealer though to get it checked out?
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Old 01-15-2006, 06:58 PM   #4 (permalink)
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Don't rush to the dealer. I have had the light come on, then go off nad never come back. Even if he had reset it, the light would have come back if the problem persisted.
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Old 01-23-2006, 12:22 AM   #5 (permalink)
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if the code is reading the coolant temp is below spec and the temp is remaining normal durring drive, the thermostat is probably sticking open and just letting the coolant circulate and not reach it's operating temp "in time"...something to check out.
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