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Discussion Starter · #1 ·
Hi all,

I have a 1995 200sx SR-E, 5 spd and recently it threw a check engine light. I ran a code reader and it kicked back the following:

Any advise with this is appreciated.

thanks in advance,

maguirre2345
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Your coolant system may be low on fluid, the thermostat may be defective or the temperature sensor may be defective.
 

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Forget about the P0 325 knock sensor code. This is an internal pending code and has no effect on emissions or performance I have it on mine for years. Past flying colors emissions.
As for the other 2:
P0 125 your coolant temperature is too low it could be that your thermostat is stuck open
P0 115 Erratic or irrational input signals coming from the engine coolant temperature (ECT) sensor circuit. Check for electrical connection/plug and/or measure/eplace sensor.
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