P0183 Code: Fuel Temperature Sensor “A” Circuit High

Temperature affects fuel density–the colder the fuel, the denser it gets. The engine control module (ECM) keeps track of fuel density to determine how much fuel to spray into the cylinders, which means it must also check fuel temperature. It uses readings from the fuel temperature sensor to adjust the performance of various engine parts and efficiently burn fuel.

The PCM will log a P0183 code if it notices that the signal from the fuel temperature sensor is too high.

What Does the P0183 Code Mean?

The Diagnostic Trouble Code (DTC) P0183 indicates “Fuel Temperature Sensor “A” Circuit High.”

The fuel temperature sensor measures the fuel’s temperature and transmits the appropriate signal to the PCM. Higher signals correlate to colder temperatures and higher fuel densities. The computer uses the signals to calculate the fuel’s density and adjusts various processes in the fuel system and engine.

The fuel temperature sensor helps the PCM adjust the air-fuel ratio to a very fine degree. This helps the engine get the right amount of fuel it needs to meet the load. It also lowers emission levels by reducing the amount of unburned fuel that leaves the engine and exhaust system.

The PCM regularly checks the signal from the fuel temperature sensor and compares the resistance to baseline readings. If the computer doesn’t get the right response from the sensor, it will set the powertrain code P0183.

Note: The definition of code P0183 may differ depending on the vehicle manufacturer. Check the appropriate repair manual or repair database for the exact code definition.

What are the Possible Causes of the P0183 Code?

• Bad fuel temperature sensor
• Faulty PCM
• Problems with the wiring harness of the fuel temperature sensor

What are the Common Symptoms of the P0183 Code?

• Illuminated check engine light
• Poor fuel economy
• Engine hard starts
• Poor engine performance

How to Diagnose the P0183 Code

The P0183 is a powertrain code that applies to OBD-II-compliant vehicles. While it’s a generic code, the steps for diagnosing and fixing it can vary between vehicles.

If you’re not confident about conducting diagnostic tests on your vehicle, it’s a good idea to bring it to a certified mechanic. Otherwise, you may go ahead and diagnose the issue yourself. Here is a video to give you an idea of what the process might involve:

How to Fix the P0183 Code

Attempting to fix a P0183 code may become a frustrating task if you don’t have the right tools and know-how to test the fuel temperature sensor. You will often need a digital multimeter, an electrical wiring diagram, and a repair manual to test the sensor and its wiring. In most cases, it’s best to leave the job to a professional.

For DIYers who prefer to test and replace their vehicle’s fuel temperature sensor on their own, it will be helpful to rely on the appropriate repair manual or refer to an online repair database.

Fixing DTC P0183 By Replacing the Fuel Temperature Sensor

Neglecting to fix DTC P0183 leads to many problems. For example, you’ll have to deal with worse fuel economy. Your engine might also struggle to start. Replacing your vehicle’s fuel temperature sensor should fix the issue, but it can be tricky to find a replacement. Fortunately, getting your hands on a new one is easy with the help of CarParts.com.

The best part? You won’t have to take one step outside your door to get the job done.

Simply download our mobile app or visit our website. Use our vehicle selector, and toggle our search filters to shop according to your preferred brand, price range, and more.

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