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Possible causes
- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Evaporative Emission (EVAP) canister or fuel tank leaks
- Evaporative Emission (EVAP) system hose leaking
- Fuel tank leaking
P0456 Chrysler Description
The Evaporative emissions system is design to prevent the escape of fuel vapors from the fuel system. Leaks in the system, ca allow vapors to escape into the atmosphere. The leak detection system tests for EVAP system leaks and blockage.
During the self-diagnostics, the Powertrain Control Module (PCM) first checks the Leak Detection Pump (LDP) for electrical and mechanical faults. If the first checks pass, the PCM then uses the LDP to seal the vent valve and pump air into the system to pressurize it. If a leak is present, the PCM will continue pumping the LDP to replace the air that leaks out. The PCM determines the size of the leak based on how fast/long it must pump the LDP as it tries to maintain pressure in the system.
The P0455 means Evaporative Emission Control System Leak Detected (gross leak) and the P0446 means Evaporative Emission Control System Vent Control Circuit. _____________ NEXIQ 125030 usb link
P0300 - generic misfire.
P0301 - misfire at cylinder 1 = the spark was not generated at some time at cylinder 1 P1494 - Evap Leak Detection pump pressure switch condition = the ECM detected the leak detection pump switch did not change after the solenoid was energized P1495 - leak detection pump solenoid circuit = the electrical circuit that commands the solenoid of the pump is interrupted You need to check the wiring to the solenoid and the solenoid itself, located under the driver's side in the cast cradle under the steering gear. A good expertise of car electrics is required for that, you will need a good repair shop.
The definition for P0456 is: Evaporative Emission System Leak Detected (very small leak). Check all your vacuum lines especially around the canister and check the gas cap on the vehicle for a good seal and make sure it is on good. I hope this helps you and good luck.
It's a leak in your evap system.
Causes:
*Loose or missing fuel cap.
*Evap canister broke, hose cracked or not connected.
*Purge or vent solenoid defective
*Vacuum leak at engine
good luck
Below are the possible causes for your engine light and error code:
Possible Causes:
EVAP fuel tank or canister vapor hoses leaking or damaged
EVAP system component leaking, fuel cap loose or missing
Leak detection pump damaged or leaking
The fuel cap is probably the most common cause of this problem. It's considered part of the emission system and if faulty or not place on the filler tube correctly, it will throw an error. Best of luck with your engine light issue. Take care! Greg
1684 is 'battery disconnected in last 50 starts' and should shut off after you have used it for 50 more. 0455 is 'Evaporative emission control system leak detected (gross leak)
Could be the gas cap. Do you fill the tank with the engine running?
Otherwise, check the hoses near the Evap canister. I have 2003 T&C and had the small leak and large leak codes. I looked at the evap cansiter and the hose coming from the fuel tank vapor line had a huge crack in it, to the point it had fallen off the evap caniser. I trimmed the end of the hose and reconnected and voila, no codes.
The evap canister is on the driver's side of the van, underneath, slightly behind the drivers seat.
BTW, to clear the codes without an OBDII reader, remove the negative cable for 5-10 minutes (15 to be safe). The computer resets and clears the codes, except for one that it sets saying loss of power to the memory.
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