I have p0450 code and need the location of the evaporative system pressure sensor is located so I can check it or change it if neccessary
Locate the charcoal canister under the rear of the vehicle. The canister vent control valve is bolted to the side or the end of the charcoal canister. The valve will have a 2 pin electrical connector and is used to close or seal off the charcoal canister vent when the engine control module (ECM) performs an evaporative emission leak test. To test the canister vent control valve, remove the canister vent control valve from the canister. Verify the o-ring between the canister vent control valve and the canister is in place and in good condition. With the electrical connector for the canister vent control valve unplugged, blow air (by mouth) through the canister vent control valve to verify the valve is not stuck closed. If the valve is physically stuck closed, replace it. If the valve is open, use a digital volt ohmmeter (DVOM) and a wire diagram and verify there is battery voltage at the connector with the key on. The ECM grounds the remaining wire to close the valve during an emission leak test. Bench test the canister vent control valve using jumper wires and applying power and ground to the valve from a battery. Verify the canister vent control valve activates and closes and will hold a vacuum when applied to the valve. Then release the power and ground and verify the valve will open. If the canister vent control valve fails any of these tests, replace the valve. Also verify there are no charcoal particles in the valve. When there are charcoal particles in the canister vent control valve, the charcoal canister will need to be replaced at the same time.
Found this on YouTube. How to Test and Replace EVAP Pressure Sensor P0450 Its behind the drivers side rear tire.
Locate the charcoal canister under the rear of the vehicle. The canister vent control valve is bolted to the side or the end of the charcoal canister. The valve will have a 2 pin electrical connector and is used to close or seal off the charcoal canister vent when the engine control module (ECM) performs an evaporative emission leak test. To test the canister vent control valve, remove the canister vent control valve from the canister. Verify the o-ring between the canister vent control valve and the canister is in place and in good condition. With the electrical connector for the canister vent control valve unplugged, blow air (by mouth) through the canister vent control valve to verify the valve is not stuck closed. If the valve is physically stuck closed, replace it. If the valve is open, use a digital volt ohmmeter (DVOM) and a wire diagram and verify there is battery voltage at the connector with the key on. The ECM grounds the remaining wire to close the valve during an emission leak test. Bench test the canister vent control valve using jumper wires and applying power and ground to the valve from a battery. Verify the canister vent control valve activates and closes and will hold a vacuum when applied to the valve. Then release the power and ground and verify the valve will open. If the canister vent control valve fails any of these tests, replace the valve. Also verify there are no charcoal particles in the valve. When there are charcoal particles in the canister vent control valve, the charcoal canister will need to be replaced at the same time.
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http://engine-codes.com/p0453_honda.htmlForum CodePossible causes- Fuel Tank Pressure sensor harness is open or shorted http://engine-codes.com/p0450.htmlForum CodePossible causes- Evaporative Emission System (EVAP) Pressure sensor harness is open or shorted P0440 Evaporative emission (EVAP) system - malfunction
Possible causes: Hose connection(s), intake leak, EVAP canister purge valve
P0441 Evaporative emission (EVAP) system - incorrect flow detected
Possible causes: Hose connection(s), intake leak, EVAP canister purge valve
P0442 Evaporative emission (EVAP) system - small leak detected
Possible causes: Hose connection(s), intake leak, EVAP canister, EVAP canister purge valve
P0443 Evaporative emission (EVAP) canister purge valve - circuit malfunction
Possible causes: Wiring, EVAP canister purge valve, ECM
P0444 Evaporative emission (EVAP) canister purge valve -open circuit
Possible causes: Wiring open circuit, EVAP canister purge valve, ECM
P0445 Evaporative emission (EVAP) canister purge valve -short circuit
Possible causes: Wiring short circuit, EVAP canister purge valve, ECM
P0450 Evaporative emission (EVAP) pressure sensor - circuit malfunction
Possible causes: Wiring, EVAP pressure sensor, ECM
P0455 Evaporative emission (EVAP) system - large leak detected
Possible causes: Hose connection(s), intake leak, EVAP canister, EVAP canister purge valve
P0456 Evaporative emission system - very small leak detected
Possible causes: Mechanical fault, hose connection(s), EVAP pressure "sensor
P0457 Evaporative emission system - leak detected (fuel cap loose/off)
Possible causes: Mechanical fault, hose connection(s), EVAP pressure sensor
P0458 Evaporative emission system, purge control valve -circuit low
Possible causes: Wiring short to earth, EVAP valve
P0459 Evaporative emission system, purge control valve -circuit high
Possible causes: Wiring short to positive, EVAP valve
Evaporative Emission Purge Solenoid
Description & Operation
The duty cycle EVAP canister purge solenoid (DCP) regulates the rate of vapor flow from the EVAP canister to the intake manifold. The Powertrain Control Module (PCM) operates the solenoid.
During the cold start warm-up period and the hot start time delay, the PCM does not energize the solenoid. When de-energized, no vapors are purged. The PCM de-energizes the solenoid during open loop operation.
The engine enters closed loop operation after it reaches a specified temperature and the time delay ends. During closed loop operation, the PCM cycles (energizes and de-energizes) the solenoid 5 or 10 times per second, depending upon operating conditions. The PCM varies the vapor flow rate by changing solenoid pulse width. Pulse width is the amount of time that the solenoid is energized. The PCM adjusts solenoid pulse width based on engine operating condition.
Removal & Installation
The duty cycle evaporative (EVAP) canister purge solenoid is located in the engine compartment near the brake master cylinder.
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