u/Big-Campaign-2432

2001 Toyota Echo 1.5L 1NZFE 150k miles
Has a EVAP code P0440 engine light that comes on same day as cleared.

Following Components have been Replaced:

• Purge valve
• Charcoal canister + vent valve
• FTP (Fuel Tank) sensor
• Gas cap
• Fuel Filler Neck
• Mass Air Flow Sensor
• PCV Valve
• Multiple smoke tests passed
• Wiring/voltage to ECU verified

The dealership has given up on this CEL light. They claim all parts of EVAP system have been replaced and smoke tests passed form both front and rear of system (multiple attempts)

They also live tested and noticed the "pending" code came back VERY quickly and they did also verify correct voltage to ECU. I would like to get rid of the CHECK ENGINE CEL, but the dealer cannot find anything wrong. I also took it to a 3rd party independent shop with a good reputation hopeful of a diagnosis, but they could not find fault either.

2001 Toyota Echo 1.5L 1NZFE 150k miles
Has a EVAP code P0440 engine light that comes on same day as cleared.

Following Components have been Replaced:

• Purge valve
• Charcoal canister + vent valve
• FTP (Fuel Tank) sensor
• Gas cap
• Fuel Filler Neck
• Mass Air Flow Sensor
• PCV Valve
• Multiple smoke tests passed
• Wiring/voltage to ECU verified

The dealership has given up on this CEL light. They claim all parts of EVAP system have been replaced and smoke tests passed form both front and rear of system (multiple attempts)

They also live tested and noticed the "pending" code came back VERY quickly and they did also verify correct voltage to ECU. I would like to get rid of the CHECK ENGINE CEL, but the dealer cannot find anything wrong. I also took it to a 3rd party independent shop with a good reputation hopeful of a diagnosis, but they could not find fault either.