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P0185 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.


The DTC P0185 code indicates that the fuel temperature sensor circuit is malfunctioning. The tank’s fuel temperature sensor is responsible for keeping track of the fuel temperatures within the tank. It is important to keep in mind that this code applies only to certain vehicles, and may not apply to all vehicle types and models. It is essential to consult the vehicle’s documentation or ask for advice from an automobile expert in order to obtain a correct interpretation.


It indicates that the voltage signal from the fuel temperature sensor is higher or lower than the manufacturer’s specified range when the P0185 code is activated. This may be caused by a variety of factors that influence the performance of the sensor and result in incorrect fuel temperature readings.


The P0185 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 Problems: Corroded or damaged wiring in the circuit that houses the fuel temperature sensor might prevent signal transmission, giving rise to readings that are incorrect.
  • 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 P0185 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 P0185 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 P0185 code include:

  • Ignoring Other Codes: P0185 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?

Various factors, e.g., the severity of the problem and driving conditions, play an important role in determining DTC code P0185. If you ignore this code, your vehicle may still be operational with the present code, thus leading to incorrect readings of fuel levels and potentially a problem with fuel efficiency.

What repairs can fix the code?

repair manuals

The P0185 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), P0182 (Fuel Temperature Sensor A Circuit Low Input), and P0183 (Fuel Temperature Sensor A Circuit High Input). This code can tell you more about the overall performance of a fuel temperature sensor.


The P0185 DTC code is capable of detecting potential problems with the fuel temperature sensor circuit. It is vital that you identify the problem immediately and carry out the necessary repairs to maintain a consistent reading on fuel temperature, fuel efficiency, and overall engine performance. If you encounter this code and need to be properly diagnosed and dealt with, it is advised that you ask for the help of an expert car service, which will make your driving experience more pleasant.

P0185 Code – What Does It Mean & How To Fix It