Fuel Tank Pressure Sensor Performance
Table of contents
P0451 PONTIAC Possible Causes
- Faulty Fuel Tank Pressure (FTP) Sensor
- Fuel Tank Pressure (FTP) Sensor harness is open or shorted
- Fuel Tank Pressure (FTP) Sensor circuit poor electrical connection
How do I fix code P0451 PONTIAC?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P0451 PONTIAC code
The cost of diagnosing the P0451 PONTIAC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the code detected
An intermittent voltage signal from EVAP control system pressure sensor is sent to Engine Control Module (ECM).
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0451 PONTIAC Description
The Evaporative Emission (EVAP) system is used to store fuel vapors in order to reduce the amount of fuel vapors into the atmosphere. The Fuel Tank Pressure (FTP) sensor is only used for EVAP system diagnostics. The FTP sensor is a transducer that varies resistance according to changes in the fuel tank pressure. The Engine Control Module (ECM) monitors the FTP sensor signal in order to detect vacuum decay and excess vacuum during the EVAP system diagnostic test. The ECM supplies a 5-volt reference and a low reference circuit to the FTP sensor.