Is there a leak in the EVAP system?
While the trouble code may state that there is a “large leak” in the EVAP system of your Jeep Grand Cherokee, the actual leak will most likely still look rather small. The “large” really is referring to how much pressure is being lost.
How does the EVAP system work on a Jeep Grand Cherokee?
The EVAP system captures all fuel vapor from the fuel tank and sends them to the engines intake in order to be ignited in the normal combustion process. When there is a large leak in the Jeep Grand Cherokee’s EVAP system, it will throw the P0455 OBDII Code.
How does an evaporative leak detection pump work?
The evaporative leak detection pump is used to build pressure in the evaporative control (EVAP) system each time the self-diagnostic leak check is performed by the engine control computer. Symptoms of a Bad or Failing Evaporative Leak Detection Pump. Evaporative Leak Detection Pump Related Repair Advice.
Where are Chrysler evaporative leak detection systems located?
Chrysler Evaporative Leak Detection Systems Southern Illinois University Carbondale OpenSIUC Presentations Department of Automotive Technology 2008 Chrysler Evaporative Leak Detection Systems Matthew Dixon Southern Illinois University Carbondale, [email protected] Follow this and additional works at:http://opensiuc.lib.siu.edu/auto_pres
How to diagnose leak in EVAP leak detection pump?
To diagnose this problem, follow this procedure: Turn the key to the ON position. Check for battery voltage on the power supply wire (pink/grey)at the 3-way connector located on the Leak Detection Pump. If you detect battery voltage on more than 1 wire, the wire harness is shorted and must be repaired before proceeding with other tests.
How to detect an evaporative emission control system leak?
P0456 Evaporative Emission Control System Leak Detected (very small leak) P0457 Evaporative Emission Control System Leak Detected (fuel cap loose/off) P1443 Evaporative Emission Control System Control Valve Malfunction P1455 Evaporative Emission Control System Leak Detected (Gross Leak/No Flow)
How to diagnose leak detection pump switch p1494?
If you have a P1494 EVAP Leak Detection Pump Switch or Mechanical Fault trouble code, this post will help you understand what it is and how to fix it. To diagnose this problem, follow this procedure: Turn the key to the ON position.
Can a check engine light show an EVAP code?
Good news for consumers with vehicles not showing any signs of a fuel leak: even if your check engine light is on and you find an EVAP code via the OBD II reading, it might be a simple fix. In other cases, however, it might not be.