My CK15703 2006 chev pick up has a mil light #P0455. Can you advise me what the probable cause is. Brian

Here's a link to code P 0133. P0133 OBD II Trouble Code Here's a link to code P0455. P0455 OBD II Trouble Code

PO455- Evap System -gross leak

That code ( P0455 - Evaporative Emission Control System Leak Detected (gross leak/no flow)) is for an item that's part of your emissions control system. Chances are when you take it in for inspection they will fail it due to the presents of this code. It might also be causing the MIL flag to be set, which is something they look for also.

maybe aftermarket products--------disconnect batt and touch neg and pos cables together-after few minutes reattach and start car-----as long as its runnin fine-cause its just evap emmiss issue

Why would you go to inspection, with a govt
mandated check light on the dash ??

You had to know your PO455 was a Gross EVAP
System Leak

I'am suprised the car even ran

p0455 is evap control system no purge or large leak
p0442 is evap control system leak detected (small leak)

the cause for both could actually be a loose gas cap.

I had the same code on my 2005 Tahoe. I kept getting the tighten fuel cap warning and code P0455. I just replaced the Fuel Tank Evaporator Control, GM part # 25932571. List price is $28.27. On the Tahoe it is located on the passenger side in front of the rear axle next to where the exhaust goes up and over the axel. With a lift it took about 20 minutes to replace it. I don't know if the location is the same on the Silverado. GM parts direct has the part for $14 and change with another $12 and change for shipping.....it's easier to go to the dealer and pick it up.

U can still drive the car, the light means that a malfuntion has occured in the engine/emission system electronic controls, have the system tested for the trouble code that was stored with the light.

Apparently so - P0501 is a speed sensor code,
FAILURE CONDITIONS The ECM will set a code and the Malfunction Indicator Lamp (MIL) will turn on if there is no vehicle speed sensor output signal for 20 seconds during two driving cycles when the following conditions are met: a. Open between fuse and wheel speed sensor (WSS) b. Open between WSS and GND c. Open between WSS and ECM d. Short to battery or GND between WSS and ECM e. Faulty WSS However, the other, P-456 is an EVAP system code: a. Fuel filler cap loose or missing b. Fuel filler cap o-ring missing or damaged c. Faulty or damaged fuel filler pipe d. Leaking, disconnected or plugged fuel vapor lines e. Fuel in lines due to faulty rollover valve, on-board refueling vapor recovery valve or stuck closed CCV f. Canister close valve clogged, stuck open or closed g. Improperly installed purge solenoid valve h. PSV stuck open or closed i. Faulty fuel tank pressure sensor j. Leaking canister or catch tank a. If any codes relating to FTPS, CCV or PSV circuits are present, do all repairs associated with those codes before proceeding with this troubles area. b. If DTC P0455 is stored and MIL is illuminated, before proceeding to evaporative system test and repair, verify whether the customer was running the engine during refueling. c. If an obvious cause for DTC P0455 is an engine running during refueling, erase the DTC P0455 using Hi-Scan and do not repair the evaporative system. However, the vehicle should be monitored to find reoccurrence of the concern which may come from actual evaporative system.

Hello, I have a 2003 Dodge Ram 6 cylinder ( Ram Pick -up 1500) The indicator lights are coming on. One says LAMP OUT, and the other is a picture of the engine. I have no idea. Doesn't seem like anything is wrong with the engine and I didn't find any lights that where out. I need help.


Mr. Brian C. Daniels

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