How many wire connections to an ECU does a coolant sensor have?
The engine coolant temperature sensor is temperature-variable resistor, which usually has a negative temperature coefficient. It is a two-wire thermistor immersed in coolant and measures its temperature.
Can a bad coolant temp sensor cause a lean code?
Engine Overheating The coolant temperature sensor can also fail in a manner; that causes it to send a permanently hot signal. As a result, causing the computer to incorrectly compensate for a lean signal. All of which can result in overheating, and even misfires or engine ping.
How to troubleshoot the engine coolant temperature ( ECT ) sensor?
This article will help you to troubleshoot the engine coolant temperature (ECT) sensor on your GM 4.3L, 5.0L, or 5.7L equipped pick up, van, mini-van or SUV. You can either use a multimeter or a scan tool (w/ Live Data capability) to diagnose the ECT sensor and/or trouble codes.
What does it mean when coolant sensor does not change?
This will indicate that your coolant sensor is responding to engine temperature. Also, make sure the engine reached operating temperature at about 200F (93C) before dropping. If engine temperature didn’t change much throughout your readings, the thermostat is stuck open and you need to replace it.
How do you disconnect a coolant temperature sensor?
Be careful when disconnecting the sensor. You may need to press a tab or pry loose a retainer wire before you can unplug the connector. Some sensors use a mounting clip you can pry off using a thin screwdriver or scratch awl. 5.
Where is the coolant temperature sensor on a V6?
Locate the CT sensor. On most inline engine models (four or six cylinders), look for the sensor around the upper section of the engine block or around the cylinder head. On most V8 (and some V6) engines, you may find it also around the upper part of the engine or under the intake manifold.