Which is a bad coolant temp sensor code?

Coolant temp sensor is bad. PCM is bad. This code indicates that the PCM is seeing a high voltage drop across the ECT sensor, which it’s translating as an extremely hot coolant condition. When the PCM senses this high voltage input, it will translate this voltage input to a coolant temperature of -46° F (-50° C).

How does the coolant temp sensor work on a PCM?

When the PCM senses this high voltage input, it will translate this voltage input to a coolant temperature of -46° F (-50° C). Coolant temp sensor’s wires have an ‘open-circuit’ problem (usually due to a cut wire).

How to replace ambient light sensor 14-19 Chevy Silverado?

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What happens to the ECT sensor when the coolant is cold?

When the coolant is cold (or ambient temperature), the sensor’s internal resistance is higher. This higher resistance has a direct impact on the 5 Volts passing thru’ it since it blocks some of it from passing thru’ to Ground (-this action of blocking voltage from passing thru’ is called a voltage drop) .

Where is the coolant temp sensor on this S10 Blazer?

I have a 2001 S10 Blazer with an engine coolant sendor code. Where is the sensor on this vortec 4.3? I have looked everywhere. I found the gage sender on the left head. is there one sensor for both the gage and the computer? Got Fuel Rails? I have a 2001 S10 Blazer with an engine coolant sendor code. Where is the sensor on this vortec 4.3?

What’s the name of the coolant temperature sensor?

Coolant temperature sensors are also known as engine coolant temperature sensors or ECT sensors. The principle working of this sensor involves the use of an electrical resistance which measures the temperature of the coolant.

How can I tell if my coolant temperature sensor is bad?

To diagnose the coolant temperature sensor, you need a repair manual for your car model to find what measurement values you should expect from the coolant temperature sensor. Connect an OBD2 Scanner and look for related trouble codes. Check the live data to see the temperature from the sensor.

What should coolant temp be when engine is hot?

With a good OBD2 code reader, you can also check the live data and the parameters of the CTS sensor. Check that the temperature value of the CTS is around 80-90c when the engine is hot. A lot of engine coolant temperature sensors have two wires and the sensor is controlled by Ohm.

Where are the coolant temperature sensors on a Chevy?

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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.

Can a bad coolant sensor cause a car to not start?

Some cars use the engine coolant temperature sensor to control the electric cooling fans. You have two separate temperature sensors for the fans, dashboard gauge, and engine management in most cars. However, if your car has a single sensor, a bad engine coolant temperature sensor may result in your fans won’t start at all.