OBD11 DTC definitions
PO-456
EVAP emmission control system leak (very small)
possibly faulty purge valve
Mi truck is a ford f 150 4door n i have thise problen code po456
Code PO456 on a 2004 RAV4 indicates a small leak in the evaporative emissions system. To fix this, start by inspecting the gas cap for cracks or damage and ensure it seals properly. Check the EVAP hoses and connections for wear or leaks, and consider using a smoke test to identify any hidden leaks. If necessary, replacing faulty components like the purge valve or charcoal canister may also resolve the issue.
Check on the driverside cylinder head. My engine code is on the head.
When the check engine light comes on it should post a code. Use a code reader to see what the code is and ask again.
yes it can. if the check engine light shuts off by itself then chances are either the trouble code is a soft code. A hard code will keep the check engine light on until the problem is fixed and the check engine light is reset.
and what code does the check engine light say ? go by autozone they will check it for free and get the code.
It is possible that a Subaru Check Engine Code #12 is a bad starter switch. This is usually the starter relay switch malfunction code for Subaru.
You can buy the check engine computer and the book comes with it. I know, I bought one. When your check engine light comes on, you plug it in and check the engine and it will give you the code and you look in the book for that code and it gives you the answer.
The check engine light sets a code for diagnostics and you need a code reader. Most auto parts stores sell code readers and most will check the codes for free.
The PO456 code, indicating a small leak in the evaporative emissions system, typically resets after the vehicle's onboard diagnostic system completes a series of self-tests and determines that the issue has been resolved. This usually occurs after several driving cycles without the problem reappearing. To expedite the reset, you can clear the code using an OBD-II scanner or disconnecting the battery for a short period, but it's essential to ensure the underlying issue is fixed to prevent the code from returning.
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
P0520 Code Engine Oil Pressure Sensor/Switch Circuit Malfunction