More Saab Engine Coolant Temperature Sensor - Delphi TS10253
Delphi
SKU: DEL-TS10253

Saab Engine Coolant Temperature Sensor - Delphi TS10253

9-3

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Description

Details

SKU:
DEL-TS10253
FCP Euro ID:
529521
GTIN / UPC:
00689604209301
Made in:
China
Quality:
Aftermarket

OE Numbers

12639899

MFG Numbers

TS10253

Product Information

Engine Coolant Temperature Sensor

The engine coolant temperature (ECT) sensor, or simply coolant temp sensor, plays a vital role in monitoring the engine's operating temperature and communicating this information to various vehicle systems. This sensor is located in the engine's coolant passage typically in the cylinder head or block. It works by varying its resistance based on the temperature: as the engine heats up, the resistance decreases, and as it cools down, the resistance increases. The ECT sensor sends this data to the ECU, which uses it for several critical functions, such as the air-fuel mixture, ignition timing, and control of the cooling fans and dashboard temperature gauge. There are many European applications where there is more than one coolant temp sensor, separating the signals used for engine ECU and other functions such as gauges and fans.

A faulty sensor might send incorrect temperature readings to the ECU, resulting in poor engine performance. The most common example is if the sensor incorrectly signals that the engine is colder than it is, the ECU will enrich the air-fuel mixture unnecessarily, leading to rough idling, poor fuel economy, or even black smoke from the exhaust due to unburnt fuel.

Conversely, if the sensor falsely indicates an engine overheating condition, the ECU might trigger warning lights, prematurely activate the cooling fans, or even cause the car to go into "limp mode," limiting engine power to prevent damage (however this is a rarer failure mode).

Engine Coolant Temperature Sensor Failure Symptoms
  • Wrong Temp Readings: If the coolant temperature gauge is acting unpredictably, or reading consistently too high or too low, it may be either a coolant temperature sensor or a thermostat. Because of this, it’s common to replace both of these parts at the same time for the best probability of success while the cooling system is opened.
  • Running too rich: If you have noticed the temperature gauge is low and the exhaust is black and sooty, the engine might be stuck in the warm-up loop due to a bad coolant temperature sensor even though the engine is at the proper operating temperature controlled by the thermostat.
  • Non-linear or suspicious live data output: For vehicles equipped with OBDII, use a scan tool to monitor the exact temperatures being output from the sensor. As the car warms up the output should be smooth and linear. If there are dead spots or it acts suspiciously, you may need to replace the sensor.

About Delphi

With a presence in more than 150 countries, and a global network of over 2750 service centers, Delphi provides OE specification end-to-end solutions from components to sophisticated software solutions.

With a wide-ranging portfolio including gasoline fuel systems, diesel fuel systems, maintenance solutions, engine management, and vehicle electronics, backed by OE-level diagnostic and test equipment, training, and technical information, Delphi enables garages to service and repair vehicles right the first time.

Delphi's portfolio includes gasoline fuel systems, diesel fuel systems, maintenance solutions, engine management, and vehicle electronics, plus training, diagnostics, and test equipment. We serve the passenger and commercial vehicle segments, as well as agricultural, marine, and industrial vehicle markets worldwide.

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  • 2009 Saab 9-3 2.0T Engine Coolant Temperature Sensor
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    Manual AWD Wagon 2.0L L4 B207R Gas
  • 2009 Saab 9-3 2.0T Engine Coolant Temperature Sensor
    Manual FWD Wagon 2.0L L4 B207R Gas
  • 2009 Saab 9-3 Aero Engine Coolant Temperature Sensor
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    Automatic AWD Wagon 2.8L V6 B284R Gas
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