2006 Gx Check Engine Light On,vsc Trac And Vsc Off

[mytwosons]

This morning when i started my 2006 GX Check engine light stays on also the VSC TRAC and VSC OFF. I pulled out the code and it reads P0456 anybody who experienced this kind of problem?

[mann777]

Nothing serious,

DTC No. DTC Detecting Condition Trouble Area

P0442

P0456

After cold engine start.

After VSV for EVAP operation, the VSV for EVAP is turned off

sealing the vacuum in the system and the ECM begins to monitor

the pressure increase.

Some increase is normal. A very rapid, sharp increase in pressure

indicates a leak in the EVAP system and sets the DTC

P0442.

This monitoring method is also able to distinguish what is

called the small leak detection.(DTC P0456)

A pressure rise just above normal indicates a very small hole.

Fuel tank cap incorrectly installed

Fuel tank cap cracked or damaged

Hose or tube cracked, hole, damaged or loose seal ((3) or (9)

in Fig. 1)

Vacuum hose cracked, holed, blocked, damaged or disconnected

((1), (2), (4), (5), (6), (7), (8), (10)and (11) in Fig. 1)

Fuel tank cracked, holed or damaged

Charcoal canister cracked, holed or damaged

Open or short in vapor pressure sensor circuit

VSV for CCV

VSV for EVAP

VSV for pressure switching valve

Vapor pressure sensor

Fuel tank over fill check valve cracked or damaged.

What you should do is

Check your Gas Tank Cap,probably it would be loose while you did last re-fueling.

Next go below your car, there is hose from the Fuel Tank which connects the VSV canister, check out the hose clamp and have them re-tightened.

Now Disconnect the battery terminal (-) and EFI fuse, to erase the DTC code in the ECM memory. And have them reconnected.

That it you are good to go.

[mytwosons]

Thanks! I will keep you updated.

Nothing serious,

DTC No. DTC Detecting Condition Trouble Area

P0442

P0456

After cold engine start.

After VSV for EVAP operation, the VSV for EVAP is turned off

sealing the vacuum in the system and the ECM begins to monitor

the pressure increase.

Some increase is normal. A very rapid, sharp increase in pressure

indicates a leak in the EVAP system and sets the DTC

P0442.

This monitoring method is also able to distinguish what is

called the small leak detection.(DTC P0456)

A pressure rise just above normal indicates a very small hole.

Fuel tank cap incorrectly installed

Fuel tank cap cracked or damaged

Hose or tube cracked, hole, damaged or loose seal ((3) or (9)

in Fig. 1)

Vacuum hose cracked, holed, blocked, damaged or disconnected

((1), (2), (4), (5), (6), (7), (8), (10)and (11) in Fig. 1)

Fuel tank cracked, holed or damaged

Charcoal canister cracked, holed or damaged

Open or short in vapor pressure sensor circuit

VSV for CCV

VSV for EVAP

VSV for pressure switching valve

Vapor pressure sensor

Fuel tank over fill check valve cracked or damaged.

What you should do is

Check your Gas Tank Cap,probably it would be loose while you did last re-fueling.

Next go below your car, there is hose from the Fuel Tank which connects the VSV canister, check out the hose clamp and have them re-tightened.

Now Disconnect the battery terminal (-) and EFI fuse, to erase the DTC code in the ECM memory. And have them reconnected.

That it you are good to go.

[mytwosons]

I followed your instruction tightened gas cap and the hose clamp from the fuel tank that connects to the charcoal canister and it works so far so good after a road test.Thank you very much!

Nothing serious,

DTC No. DTC Detecting Condition Trouble Area

P0442

P0456

After cold engine start.

After VSV for EVAP operation, the VSV for EVAP is turned off

sealing the vacuum in the system and the ECM begins to monitor

the pressure increase.

Some increase is normal. A very rapid, sharp increase in pressure

indicates a leak in the EVAP system and sets the DTC

P0442.

This monitoring method is also able to distinguish what is

called the small leak detection.(DTC P0456)

A pressure rise just above normal indicates a very small hole.

Fuel tank cap incorrectly installed

Fuel tank cap cracked or damaged

Hose or tube cracked, hole, damaged or loose seal ((3) or (9)

in Fig. 1)

Vacuum hose cracked, holed, blocked, damaged or disconnected

((1), (2), (4), (5), (6), (7), (8), (10)and (11) in Fig. 1)

Fuel tank cracked, holed or damaged

Charcoal canister cracked, holed or damaged

Open or short in vapor pressure sensor circuit

VSV for CCV

VSV for EVAP

VSV for pressure switching valve

Vapor pressure sensor

Fuel tank over fill check valve cracked or damaged.

What you should do is

Check your Gas Tank Cap,probably it would be loose while you did last re-fueling.

Next go below your car, there is hose from the Fuel Tank which connects the VSV canister, check out the hose clamp and have them re-tightened.

Now Disconnect the battery terminal (-) and EFI fuse, to erase the DTC code in the ECM memory. And have them reconnected.

That it you are good to go.