Circuit Description
The fuel temperature sensor is a thermistor which controls the signal voltage to the powertrain control module (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.
Conditions for Running the DTC
The ignition switch is in the ON position
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
| • | The PCM illuminates the malfunction indicator lamp (MIL) on the second consecutive drive trip the diagnostic runs and fails. |
| • | The PCM records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the Failure Records store this information. If the diagnostic reports a failure on the second consecutive drive trip, the Freeze Frame records the operating conditions at the time of failure and updates the Failure Records. |
Conditions for Clearing the MIL/DTC
| • | The PCM will turn the MIL off after 3 consecutive trips without a fault condition. |
| • | A history DTC clears after 40 consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures. |
| • | The scan tool Clear Info function was used. |
Diagnostic Aids
A scan tool reads the fuel temperature in degrees celsius.
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 any DTCs, use the scan tool Capture Info function to save the Freeze Frame and the Failure records for reference. The control module's data is deleted once 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? | ∞ | ||
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 DTCs stored? | -- | Go to the applicable DTC Table | Go to Diagnostic Aids |
6 | Repair the short to ground in the fuel temperature signal circuit. Refer to Wiring Repairs . Is the action complete? | -- | -- | |
7 |
Important: If the fuel injection pump is malfunctioning, the new injection pump must be timed. Refer to Fuel Injection Pump Timing Adjustment . Replace the fuel injection pump. Refer to Fuel Injection Pump Replacement . Is the action complete? | -- | -- | |
8 |
Important: The new PCM must be programmed. Refer to Powertrain Control Module Replacement/Programming . Replace the PCM. Is the action complete? | -- | -- | |
9 |
Does the scan tool indicate the diagnostic Passed? | -- | ||
10 | Does the scan tool display any additional undiagnosed DTCs? | -- | Go to the Applicable DTC Table | System OK |
