Check Engine Light Codes - Emissions

P043E
P043F
P2401
P2402
P2419

All these codes came from my sensor today as soon as I got my readings.

Anyone know how to fix? I already know it's emissions and I've already replace my Charcoal Canister.

HELP?

 

P043E Reference orifice clogged Leak detection pump creates negative pressure through reference orifice, and EVAP system pressure measured to
determine 0.02 inch leak criterion. 0.02 inch leak criterion measured at start and at end of leak check. If system pressure lower than -4.85 kPa
(-36.38 mmHg)*, ECM determines that reference orifice has clogging
malfunction.

P043F Reference orifice high-flow Leak detection pump creates negative pressure through reference orifice, and EVAP system pressure measured to determine 0.02 inch leak criterion. 0.02 inch leak criterion generated at start and at end of leak check. If system pressure higher than -1.06 kPa
(-7.95 mmHg)*, ECM determines that reference orifice has high-flow malfunction.

This is the listed possible causes for both of the above:

• Canister pump module
• Connector/wire harness (Canister pump module - ECM)
• ECM
• Leakage from EVAP system While ignition switch OFF

P2401 Leak detection pump stuck OFF Leak detection pump creates negative pressure through reference orifice, and EVAP system pressure measured to determine leak criterion. 0.02 inch leak criterion is measured at start and at end of leak check. If system pressure higher than -1.06
kPa (-7.95 mmHg)*, or lower than -4.85 kPa (-36.38 mmHg)*, ECM determines that leak detection pump stuck OFF.

• Canister pump module
• Connector/wire harness (Canister pump module - ECM)
• ECM
• Leakage from EVAP system While ignition switch OFF

P2402 Leak detection pump stuck ON Leak detection pump creates negative pressure through reference orifice, and EVAP system pressure measured to determine leak criterion. If system pressure higher than -1.06 kPa (-7.95 mmHg)*, or lower than -4.85 kPa (-36.38 mmHg)*, ECM determines that leak detection pump stuck ON.

Listed Possible Causes:

• Canister pump module
• Connector/wire harness (Canister pump module - ECM)
• ECM


The common items on all of these codes is the wiring harness to the Canister pump module ECM, The canister pump module itself or an evap system leak. Or the ECM itself. Maybe you missed a hose or connection for the Charcoal Cannister.

 

I just got a check engine light: I got 2 codes p0456. According to the Actron website, evaporative emission system leak detected( small leak).

 

Check your Fuel Cap. Reseat it and then get it cleared at Autozone or any parts house or you can pull the battery terminal for a few minutes and reinstall.

Common causes for the small leak:

• Fuel cap (loose)

• Leakage from EVAP line (Canister - Fuel tank)

• Leakage from EVAP line (Purge VSV - Canister)

• Canister pump module

• Leakage from fuel tank

• Leakage from canister

 

Hello-

Had same codes pop up on my 2010 Toyota Tacoma - P2401, P043E, P043F, P2402, P2419. They've actually popped up at least a few times and I've cleared them, but they return a few months later- (Dates: April 2016, July 2016, Dec 2016, Feb 2017).

Is it likely I still have to do a Canister and Filter replacement?

Or could it just be a fuel cap or something more minor? The codes don't reappear until at least another 2+ months later after being cleared.

Thanks for any advise.

 

Start with the simple fix which is fairly cheap. Replace the gas cap and wait to see how it goes.