whats a 3 way catlyst? I have an error code off the ECU for this
Whats a EVAP Pressure sensor? I have an error code for this as well.

 

What codes did you get? 0703 0704 seem to match.


DTC 0703

Diagnostic Trouble Code 0703 points to a problem with the three-way Catalytic Converter.

The Cat is one of the principal components of the emissions control system. The Engine Control Module monitors
the signals from the two front Oxygen Sensors and the one rear Oxygen Sensor. The signal frequency of each
sensor indicates something about the condition of that sensor. A comparison of the frequency of the front
sensors with the rear sensor indicates something about the condition of the Cat.

This malfunction was detected when the ratio of the signal frequency from the left bank front Oxygen Sensor to
the signal frequency of the rear Oxygen Sensor exceeded a critical threshold value. This indicates that the Cat
does not have enough oxygen storage capacity. Possible causes include ...
- Three-way catalyst
- Exhaust tube
- Intake air leaks
- Fuel injectors
- Spark plugs
- Ignition timing




DTC 0704

Diagnostic Trouble Code 0704 points to a problem with the Evaporative Emission Control System Pressure
Sensor. The EVAPCSPS is installed in the purge line. The sensor detects the pressure inside the purge line and
sends a signal to the Engine Control Module. The signal voltage is directly proportional to pressure. The
EVAPCSPS is not directly used to control engine operating parameters. It is used only to evaluate EVAP
performance. Therefore a car with DTC 0704 should start and run normally.

The EVAPCSPS is located on the underside of the car near the left rear wheel. It is mounted near, but not
directly on, the EVAP canister.

This malfunction is detected when the EVAPCSPS sends an out-of-range voltage signal to the Engine Control
Module. Possible causes include...
- harness or connectors (The EVAPCSPS circuit is open or shorted.)
- bad EVAPCSPS
- EVAP Canister Vent Control Valve is stuck open
- rubber hose connected to EVAPCSPS is clogged, bent, kinked, disconnected, or improperly connected
- EVAP Canister is damaged or saturated with water
- rubber hose from EVAP Canister Vent Control Valve to the water separator
- EVAP Canister Purge Volume Control Solenoid Valve

 

Yes those were the codes.

But what does all that mean?

 

I will pull a "Daniel B. Martin" card on you and ask what mods do you have, and is your car acting differently? Do you notice a rotten egg smell when you are driving?

the -'s list where the problem may be.

I got the codes from my cheat sheet. Theres no way I would remember that or type it.

 

Well I went and checked the connections (again) and reconnected it and reset the ECU, only to get different codes. then I reset it again and got 0505. I reved the engine with no ECU errors, so...
Do you have AIM or Yahoo messenger? it would be easier to converse that way than on here. Or maybe I can just give you a call?

 

On the up side, 0505 is the "all clear" code (no problems detected). Given, ECU doesn't check everything. If get something else, shot me an email.

 

I was looking at something. What is that sensor that is attached to the side of the OEM intake scoop? It says boost sensor? What does it do, I noticed that mine doesn't have a home anymore and it sits close to the valve cover and is getting pretty warm

 

I replyed to you mail. I think thats the Intake Air Sensor, easily enough, it reads the temp of the air coming into the intake. If you removed your air box, use a plastic wire-tie to keep it away from heat sources and banging around.

 

Thanks I'll be sure to put that sensor away, hopefully thats all it is an angry little sensor.