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P0184 Code – What Does It Mean & How To Fix It

This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.


An error in the fuel temperature monitoring circuit is detected by the P0184 DTC code. Monitoring of fuel temperature in the gas tank shall be carried out under the responsibility of the Fuel Temperature Sensor. It is important to point out that this code only applies to certain types of vehicles and may not apply to any particular manufacturer or model. It is essential to consult the documentation of a vehicle or seek advice from an automotive expert, in order to make precise interpretations.


If the P0184 code has been activated, it indicates that the voltage signal given by the fuel temperature sensor is in excess of or below the specified range of the manufacturer. Various factors affect the sensor’s performance, which may lead to incorrect fuel temperature readings.


The P0184 DTC code may appear as a result of several factors:

  • Fuel temperature sensor issue: A fuel temperature sensor issue may result in erroneous voltage readings, activating the code.
  • Wiring Issues: Damaged or corroded wiring in the fuel temperature sensor circuit can disrupt signal transmission, resulting in abnormal readings.
  • Fuel Temperature Sensor Position: A fuel temperature sensor’s capacity to monitor fuel temperature properly might be impacted by improper mounting or installation.
  • Fuel Contamination: Fuel contamination might impair sensor function and result in false readings.


The following signs and symptoms might be present when the P0184 DTC code is present:

  • Illuminated Check Engine Light: The most noticeable symptom is the illumination of the check engine light on the vehicle’s dashboard.
  • Erratic Fuel Gauge: The fuel gauge may provide inconsistent or erroneous readings of the fuel level.
  • Fuel economy Issues: Inaccurate fuel temperature measurements may have an impact on the vehicle’s fuel economy.
  • Engine Performance Issues: The engine may occasionally have performance problems, such as hesitation or rough idling.


A competent technician must use a methodical methodology to accurately diagnose the P0184 DTC code. The diagnostic procedure might entail:

  • OBD-II Scanner: Using an OBD-II scanner, the mechanic can retrieve the trouble code and other relevant data from the vehicle’s onboard computer.
  • Visual Inspection: The fuel temperature sensor and its wiring should be carefully inspected visually for any obvious rust or damage.
  • Testing the Fuel Temperature Sensor: The technician may do tests to check the voltage output and reaction time of the fuel temperature sensor to changes in fuel temperature.
  • Addressing Related Problems: Prior to concentrating on the fuel temperature sensor check, it is crucial to address any concerns about fuel contamination or other related issues.

Common mistakes

Common errors to avoid when working with the P0184 code include:

  • Ignoring Other Codes: P0184 could be accompanied by other relevant codes, and ignoring them could result in missing important problems.
  • Replacing parts too soon: To prevent wasting money, it’s important to undertake a thorough diagnosis before replacing any components.
  • Ignoring Fuel Contamination: To ensure accurate fuel temperature sensor readings, fuel contamination must be checked.

How serious is this?

Different factors, such as the extent of the problem and road conditions, affect the severity of the P0184 DTC code. While the vehicle can continue operating with this code, failing to use it may lead to inaccurate fuel gauge readings and possible difficulty in attaining a certain degree of efficiency.

What repairs can fix the code?

repair manuals

The P0184 DTC code can be fixed using the following fixes, depending on the diagnosis:

  • Replacing the Fuel Temperature Sensor: If the fuel temperature sensor is broken, it may be fixed by swapping it out for a brand-new, working one.
  • Repairing Wiring: You may get the fuel temperature sensor circuit’s signal transmission working again by fixing any corroded or broken wiring.
  • Checking for Fuel Contamination: The fuel temperature sensor will give accurate results if the gasoline is clear of impurities.

Related codes

Other related DTC codes include P0180 (Fuel Temperature Sensor A Circuit), P0181 (Fuel Temperature Sensor A Circuit Range/Performance), and P0182 (Fuel Temperature Sensor A Circuit Low Input). These codes may provide additional insights into the fuel temperature sensor’s overall performance.


Potential problems with the fuel temperature sensor circuit are indicated by the DTC code P0184. Maintaining correct fuel temperature readings, fuel economy, and overall engine performance depends on prompt diagnosis and proper repairs. If you observe this code, getting expert car help is advised to correctly identify and fix the issue and guarantee a smooth and trouble-free driving experience.

P0184 Code – What Does It Mean & How To Fix It