Circuit Description
The fuel temperature sensor is a thermistor which controls the signal voltage to the PCM. When the fuel is cold, the sensor resistance is high, therefore the PCM will see a high signal voltage. As the fuel warms, the sensor resistance becomes less and the voltage drops. The fuel temperature sensor is integrated with the optical sensor. This is a type B DTC.
Conditions for Setting the DTC
| • | The fuel temperature is greater than 102°C (215°F). |
| • | The conditions were met for 2 seconds. |
Action Taken When the DTC Sets
Poor idle quality during hot conditions.
Conditions for Clearing the MIL/DTC
| • | The PCM will turn the MIL off after three consecutive trips without a fault condition. |
| • | A History DTC will clear after forty consecutive warm-up cycles during which the diagnostic does not fail (coolant temperature has risen 5°C (40°F) from the start up coolant temperature and the engine coolant temperature exceeds 71°C (160°F) during that same ignition cycle). |
| • | Use of a Scan Tool will clear the DTC codes. |
Diagnostic Aids
A scan tool reads the fuel temperature in degrees centigrade.
An intermittent may be caused by the following:
| • | Poor connections |
| • | A rubbed through wire insulation |
| • | A broken wire inside the insulation |
Test Description
The number(s) below refer to the Step number(s) on the Diagnostic Table.
-
This Step determines if DTC P0182 is a hard failure or an intermittent condition.
-
This test will determine if signal circuit is shorted to ground.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 |
Important: Before clearing the DTC(s), use the scan tool Capture Info in order to record the Freeze Frame and the failure records for reference, as the data will be lost when the Clear Info function is used. Was the Powertrain On-Board Diagnostic (OBD) System Check performed? | -- | ||
Is the Fuel Temp greater than the specified value? | 102°C (215°F) | |||
Is the Fuel Temp less than or equal to the specified value? | 17°C (63°F) | |||
4 |
Is the resistance at the specified value? | Infinite | ||
5 | The DTC is intermittent. If no additional DTCs are stored, refer to Diagnostic Aids. If any additional DTCs were stored, refer to the applicable DTC table(s) first. Are there any additional DTC(s) stored? | -- | Go to the Applicable DTC Table | Go to Diagnostic Aids |
6 | Repair the short to ground in the Fuel Temp signal circuit. Is the action complete? | -- | -- | |
7 | Replace the fuel injection pump. Refer to Fuel Injection Pump Replacement . Important: If the fuel injection pump is malfunctioning, the new injection pump must be timed. Refer to Checking/Adjust Injection Timing . Is the action complete? | -- | -- | |
8 | Replace the PCM. Important: If the PCM is malfunctioning, the new PCM must be programmed. Go to Powertrain Control Module Replacement/Programming . Is the action complete? | -- | -- | |
9 |
Does the Scan Tool indicate that this diagnostic Ran and Passed? | -- | ||
10 | Use the Scan Tool in order to select Capture Info, Review Info. Are there any DTCs displayed that have not been diagnosed? | -- | Go to the Applicable DTC Table | System OK |
