What DTC will be set by the PCM if the ECM detects a large leak in the EVAP system?

Get that Check Engine light issue handled as soon as possible. If your car’s computer determines a significant leak in the EVAP system, it will trigger code P0440.

Which is the code for an EVAP leak?

Common EVAP leak codes include: ● P0442 Evaporative Emission (EVAP) System Small Leak Detected ● P0455 Evaporative Emission (EVAP) System Leak Detected (large) ● P0440 Evaporative Emission (EVAP) System

When does the ECM test the EVAP system?

To ensure that the EVAP system is working properly, the ECM performs fuel vapor leak tests. These tests may occur when your vehicle is parked (the engine is switched off) or while it’s running.

What’s the ECM code for a large leak?

The ECM then stores codes depending on the potential size of the leak. Large leaks are recorded as code P0455, while small leaks are recorded as P0456. What are the Possible Causes of the P0455 Code?

What causes an EVAP leak in an engine?

Here are Some Possible Causes for an EVAP Code or an EVAP Leak: Missing or loose fuel cap. Incorrect fuel cap used. Evaporative (evap) emission canister or fuel tank leaks.

How does ECM check for fuel tank leaks?

If pressure does not increase, the Engine Control Module (ECM) will check for leaks in the line between the fuel tank and EVAP canister purge volume control solenoid valve under the following vacuum test condition.

The ECM then stores codes depending on the potential size of the leak. Large leaks are recorded as code P0455, while small leaks are recorded as P0456. What are the Possible Causes of the P0455 Code?

When does the evaporative emission control system leak?

P0455 Evaporative Emission Control System Leak Detected (gross or large leak) The code P0455 is set when the engine computer recognizes a large leak in the Evaporative emission control system (EVAP).

What DTC will be set by the PCM if the ECM detects a large leak in the EVAP system?