eugenez

The code is P0440 and P0442. Both of those are for Small Evaporation Leak

Got to autozone and get them to read the code(s). Then tell us.

LL

I have a 2000 ES300 and my check engine light is coming on. I changed the Gas Cap and also changed the Vapor Pressure Sensor. Still came on. What can it be? Some one help please.

Problem Solved. I changed out my MAF Sensor and Check Engine light Never came back on. Maybe some one needs this information. Good Luck!!!!!

Do you remember which O2 sensor you replaced? Ideally, if you have a scanner that allows you to monitor the sensor voltage, I would recommend adding propane to force a rich condition while monitoring the sensor output. This will tell you if the sensor is working. Otherwise you could look into swapping Bank 1 sensor 1 and bank 2 sensor 1

I have a scanner that just reads codes. How do you add the propane and where do you add it to?

I have a problem. I don't know if it is a big deal or not but every time I accelerate at low RPM there is a rattle noise coming from the engine. When RPM's go up like past 3000 it stops or maybe the noise of the engine cover it up. But I don't know what to do to make it go away.

Has any work been done recently, such as changing valve cover gaskets? If you have access to a scanner, you could check the fuel air sensor response by monitoring the output while adding extra fuel (ie such as propane from a un-lite propane torch). Otherwise you could swap sensors with bank 2 (make sure the connector is the same first). You did not mention what the mileage is.

No work has been done ever since I bought it in 2006. I did have an oxygen sensor go out on me like 2 years ago but I have replaced that and it was working fine ever since. I have 90000 miles on it.

Hi guys,

I have a little dilema. My check Engine light came on and it showed P0171 Code. System to Lean Bank 1. I cleaned the MAF sensor and changed the air filter and fuel filter. Checked all of my vacuum lines and fuel lines. Can some one help me figure out the problem without changing the sensor. If needed to change the sensor, do I need to change the MAF sensor or the Bank 1 Sensor 1. I have cleared the code a few times but after like 2-5 miles it comes back on. Please help.