Honda Element. Manual - part 21

Fig. 55: Fuel Tank Pressure (FTP) Sensor Voltage - Graph 

Fig. 56: Fuel Tank Pressure Sensor Output - Graph 

General Description 

The fuel tank pressure (FTP) sensor is installed on the evaporative emission (EVAP) canister. The FTP sensor is 
used to detect leaks in the EVAP system. The engine control module (ECM)/powertrain control module (PCM) 
monitors the FTP sensor output voltage. The FTP sensor output voltage rises as the fuel tank pressure increases. 
Conversely, the FTP sensor output voltage drops as the fuel tank pressure decreases. Rapid changes in the FTP 
sensor output voltage due to electrical noise or an intermittent open during the EVAP leak detection may cause 
incorrect leak detection, so abnormal output is monitored. 

If the FTP sensor output voltage changes a specified number of times within a set time, the ECM/PCM detects a 
malfunction and stores a DTC. 

Monitor Execution, Sequence, Duration, DTC Type, OBD Status 

 

2007 Honda Element EX 

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

  

MONITOR DESCRIPTION 

Enable Conditions 

ENABLE CONDITIONS 

Malfunction Threshold 

The FTP sensor output fluctuates by 0.3 kPa (0.1 in.Hg, 2 mmHg) or more at least five times within 3 seconds. 

Driving Pattern 

Start the engine in a cold condition, and let it idle for at least 20 seconds. 

Diagnosis Details 

Conditions for illuminating the MIL 

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM/PCM 
memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the 
freeze frame data are stored. 

Conditions for clearing the MIL 

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic 
runs. 

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear 
command or by disconnecting the battery. 

DTC P0452 (91): ADVANCED DIAGNOSTICS 

DTC P0452: FUEL TANK PRESSURE (FTP) SENSOR CIRCUIT LOW VOLTAGE 

Execution

Once per driving cycle

Sequence

None

Duration

20 seconds or more

DTC Type

Two drive cycles, MIL ON

OBD Status

PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Condition

Minimum

Maximum

Elapsed time after 
starting the engine

2 seconds

-

Throttle position

Fully closed

No active DTCs

P0122, P0123, P0222, P0223, P0452, P0453, P2101, P2108, P2118, P2122, 
P2123, P2127, P2128, P2135, P2138, P2176, U0107

 

2007 Honda Element EX 

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

  

Fig. 57: Fuel Tank Pressure Sensor - Circuit Diagram 

Fig. 58: Fuel Tank Pressure (FTP) Sensor Output Voltage - Graph 

Fig. 59: Fuel Tank Pressure - Graph 

 

2007 Honda Element EX 

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

  

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 engine control module (ECM)/powertrain control module (PCM) monitors the FTP sensor output voltage. 
The FTP sensor output voltage rises as the fuel tank pressure increases. Conversely, the FTP sensor output 
voltage drops as the fuel tank pressure decreases. If the FTP sensor output voltage does not reach a target value 
within a set time after starting the engine in a cold condition, the ECM/PCM detects a malfunction and stores a 
DTC. 

Monitor Execution, Sequence, Duration, DTC Type, OBD Status 

MONITOR DESCRIPTION 

Enable Conditions 

ENABLE CONDITIONS 

Malfunction Threshold 

The output from the fuel tank pressure sensor is less than -7 kPa (-2.1 in.Hg, -55 mmHg) for at least 3 seconds. 

Driving Pattern 

Start the engine in a cold condition, and let it idle until the radiator fan comes on. 

Diagnosis Details 

Conditions for illuminating the MIL 

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM/PCM 
memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the 
freeze frame data are stored. 

Conditions for clearing the MIL 

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic 

Execution

Once per driving cycle

Sequence

None

Duration

3 seconds or more

DTC Type

Two drive cycles, MIL ON

OBD Status

PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Condition

Minimum

Maximum

Elapsed time after starting the engine

2 seconds

-

Other

At idle

 

2007 Honda Element EX 

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element