DTC Advanced Diagnostics: P0452, P0453
DTC P0452:Fuel Tank Pressure (FTP) Sensor Circuit Low Voltage
DTC P0453:Fuel Tank Pressure (FTP) Sensor Circuit High Voltage

General Description

The fuel tank pressure (FTP) sensor is installed on the evaporative emission (EVAP) canister and detects the fuel tank pressure. The FTP sensor is used to detect leaks in the EVAP system. The powertrain control module (PCM) monitors the FTP sensor output voltage. If the FTP sensor output voltage is a specified value for a specified time, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type
Execution
Continuous
Sequence
None
Duration
0.5 second or more
DTC Type
Two drive cycles, MIL on

Enable Conditions
Condition
 
State of the engine
Running

Malfunction Threshold
DTC: P0452

The FTP sensor output voltage [FTP SENSOR] is lower than 0.12 V for at least 0.5 second.

DTC: P0453

The FTP sensor output voltage [FTP SENSOR] is greater than 4.85 V for at least 0.5 second.

[ ]: HDS Parameter

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
DTC: P0452
FTP sensor PTANK line short to ground
FTP sensor VCC line open

DTC: P0453
FTP sensor PTANK line short to power
FTP sensor PTANK line open
FTP sensor SG line open

Common
FTP sensor failure

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.