Diagnostic Aids
WARNING: This page is about a different variant/trim than selected.
- Inspect the tube and clamps to and from the EVAP leak detection pump for damage. A damage/open tube may allow debris to enter the pump and plug the reference orifice.
- Remove the EVAP leak detection pump and look inside the pump opening for any debris that could restrict or plug the reference orifice. The reference orifice is a small opening at the 2 o'clock position in the pump vacuum opening. Inspect for missing or damage O-rings.
- With the fresh air tube removed from the EVAP leak detection pump assembly, blow controlled air, 5 - 10 PSI, into this tube. There should be air escaping from behind the fuel fill pocket indicating this tube and filter are not restricted.
- A switching valve stuck in the pump position can cause insufficient flow.
- This part is not serviceable. It is very important that no debris be found in the pump fresh air inlet or vacuum openings and the tube between the EVAP leak detection pump assembly as this could cause a P043E to set.