• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
---|---|---|---|---|---|
Fuel Temperature Signal | P0182 | P0183² | P0183 | P0183 | -- |
Low Reference | -- | ² | P0183 | ¹ | -- |
¹ Opens fuse in 12-volt circuit ² Temperature is skewed and may not have any codes |
Circuit | Short to Ground | High Resistance | Open | Short to Voltage |
---|---|---|---|---|
Operating Conditions: The Ignition ON, with the Engine OFF Parameter Normal Range: -38 to +120°C (-38.4 to +248°F) | ||||
Fuel Temperature Signal | 120°C (248°F) | Varies¹ | -40°C (-40°F) | -40°C (-40°F) |
¹ Skewed sensor |
The fuel temperature sensor is a thermistor. The engine control module (ECM) supplies the fuel temperature sensor a bias voltage of 5 volts on the signal circuit and also provides a low reference circuit to the sensor. When the fuel temperature sensor is cold, the resistance is high. The fuel temperature sensor signal voltage remains near the 5 volt bias voltage cold and decreases as the sensor warms. The ECM monitors the fuel temperature sensor signal circuit in order to calculate the temperature of the fuel entering the engine.
• | The ignition is ON. |
• | DTC P0182 runs continuously within the enabling conditions. |
• | The ignition is ON. |
• | DTC P0183 runs continuously within the above enabling conditions. |
The fuel temperature sensor is more than 120°C (248°F) for 1 second.
The fuel temperature sensor is less than -38°C (-38.4°F) for 1 second.
DTCs P0182 and P0183 are Type A DTCs.
DTCs P0182 and P0183 are Type A DTCs.
• | A short to a separate or different 5-volt source may set a DTC P0183. |
• | A skewed sensor could result in poor driveability concerns. |
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
⇒ | If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM. |
⇒ | If warmer than the specified value, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the ECM. |
⇒ | If less than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM. |
Measure and record the resistance of the fuel temperature sensor at various ambient temperatures and compare those measurements to the Temperature vs. Resistance table. Refer to Temperature Versus Resistance .
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for ECM replacement, setup, and programming |