What Does P0183 Mean?
The fuel temperature sensor A circuit is reporting a high input voltage to the ECM, which on an NTC thermistor sensor corresponds to an implausibly low fuel temperature (high resistance = high voltage = very cold). The ECM has determined the voltage exceeds the maximum valid threshold, typically indicating an open circuit condition. The driver will see a check engine light but likely no driveability symptoms since the ECM will use a default fuel temperature.
Common Causes
35%
Open circuit fuel temperature sensor (infinite resistance / disconnected internally)
25%
Disconnected or damaged sensor connector
20%
Open wire in the sensor signal or ground circuit
12%
Corroded connector terminals causing high resistance (effectively open circuit)
8%
ECM reference voltage not reaching the sensor circuit
Diagnostic Steps
1
Check fuel temperature reading in live data. A reading of -40°F or an implausibly low value on a warm day indicates the circuit is open (high voltage to ECM).
2
Inspect the fuel temperature sensor connector — ensure it is fully seated and not corroded. The sensor is typically located on the fuel rail or in the fuel supply line.
3
Disconnect the sensor and measure its resistance. At room temperature, spec is typically 2,000–3,000 ohms. An infinite (OL) reading means the sensor is internally open and must be replaced.
4
If the sensor resistance is within spec, check continuity of the signal and ground wires from the sensor connector to the ECM connector. An open in either wire will cause this code.
5
Check connector terminals for green corrosion or recessed pins that may not be making proper contact. Clean or replace terminals as needed.
Estimated Repair Cost
$75 - $250
Parts + labor, varies by vehicle and location
The fuel temperature sensor A circuit is reporting a high input voltage to the ECM, which on an NTC thermistor sensor corresponds to an implausibly low fuel temperature (high resistance = high voltage = very cold). The ECM has determined the voltage exceeds the maximum valid threshold, typically ind...
The most common cause of P0183 (Fuel Temperature Sensor High Out of Range Fault) is: Open circuit fuel temperature sensor (infinite resistance / disconnected internally)
Typical repair costs for P0183 range from $75 to $250, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving. The ECM will use a default fuel temperature, which may result in slightly suboptimal fuel delivery calculations. No driveability or safety concerns are expected.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0183 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
