My mate's 98 Saxo is getting hard to start in the morning, and doesn't want to run when cold. Given that it seems OK on the open road and once warmed up, I suspect the CTS. Anybody know where it is, and what the resistance values should be hot and cold? Or, any other common faults?
Cheers
Saxo 1.1i Coolant temp sensor
Moderator: RichardW
Never seen a Saxo under the hood [:)]
But can't believe this engine would be much different from other smaller TU engines in the PSA range of cars.
With your experience - I doubt you can waste more than 5min's to find this sensor [;)]
I'd certainly expect to find it near the thermostat housing - flywheel end of head. Later engines seems to be wrapped in all kinds of nice looking plastic covers - making it a nuisance to find anything on the engine [8D]
I believe later engines have a newer design combi-sensor for coolant temp warning/temp gauge/fluid level - which then would be either a 2pole or 3 pole sensor.
Don't mix up this with the CTS.
The CTS would be a NTC resistor - hi-resistance at cold & lo-resistance at hot engine. It's not the actual resistance value that matter's but the huge variation over temperature.
If the CTS is responsible for this Saxo problem - then it must be (nearly) shorted out at cold - since a lo resistance tells the ECU the engine is hot - causing cold start/running problems.
Note that this sensor has a smaller sister residing in the throttle body - the ATS sensor - for the inlet air temp.
It's checked the same way.
But can't believe this engine would be much different from other smaller TU engines in the PSA range of cars.
With your experience - I doubt you can waste more than 5min's to find this sensor [;)]
I'd certainly expect to find it near the thermostat housing - flywheel end of head. Later engines seems to be wrapped in all kinds of nice looking plastic covers - making it a nuisance to find anything on the engine [8D]
I believe later engines have a newer design combi-sensor for coolant temp warning/temp gauge/fluid level - which then would be either a 2pole or 3 pole sensor.
Don't mix up this with the CTS.
The CTS would be a NTC resistor - hi-resistance at cold & lo-resistance at hot engine. It's not the actual resistance value that matter's but the huge variation over temperature.
If the CTS is responsible for this Saxo problem - then it must be (nearly) shorted out at cold - since a lo resistance tells the ECU the engine is hot - causing cold start/running problems.
Note that this sensor has a smaller sister residing in the throttle body - the ATS sensor - for the inlet air temp.
It's checked the same way.
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Richard,
http://www.andyspares.com/discussionfor ... xo,coolant
May prove useful. I never got round to fitting the sensor, the lad got a garage to do it, but it solved the problem nonetheless. Sensor cost about £20 from the dealer.
http://www.andyspares.com/discussionfor ... xo,coolant
May prove useful. I never got round to fitting the sensor, the lad got a garage to do it, but it solved the problem nonetheless. Sensor cost about £20 from the dealer.