Check engine light on! Any suggestions?

[Grand Prix Chick]

I'm sure there is a thread on this already but I can't seem to locate it so sorry. I have a 2001 GP GT 3800. My check engine light is on. I had a diagnostic done and the codes I got were:

- P0102 Mass or Volume air flow circuit low input
- P0443 EVAP emissin control system purge control valve circuit
- P0135 O2 sensor Bank 1 Sensor 1
- P0141 O2 sensor Bank 1 Sensor 2

I have changed both O2 sensors and the MAF sensor. The light was reset and stayed off for about 20 miles then came right back on. I had a diagnostic done again and it's still the P0102 and P0443. Any suggestions on how I can fix this problem being as though I have replace the MAF?

Thanks in advance!

 

[ricksgpgtcolleen]

The evap is normally something as simple as the gas cap being loose. If your O2s are still triggering, it COULD be a bad cat. Is the car hesitating or not performing at all? The MAF...clueless. I'm not sure what it all means in context, sorry.

 

[Brian99SE]

The purge Control valve is in the engine bay, near the intake if i remember right. It has a Line running from the tank To the Valve, To the intake. It allows the engine to burn fuel vapors building up in the tank.

 

[99PontiacGTP]

[TABLE="class: ADVV1-HotlineArchives-Whites"]
[TR]
[TD="class: ADVV1-HotlineArchives-LeftRuledRows"][/TD]
[TD="class: ADVV1-HotlineArchives-RuledRows"]Trouble code P0102.

[/TD]
[/TR]
[TR]
[TD="class: ADVV1-HotlineArchives-LeftRuledRows ADVV1-HotlineArchives-RuledRowsMileageTitle"][/TD]
[TD="class: ADVV1-HotlineArchives-RuledRows ADVV1-HotlineArchives-RuledRowsMileage"]
[/TD]
[/TR]
[TR]
[TD="class: ADVV1-HotlineArchives-LeftRuledRows"] [/TD]
[TD="class: ADVV1-HotlineArchives-RuledRows"]1. With the engine running, backprobe the Mass Air Flow (MAF) sensor. Check for ignition power on the Pink and 0 volts (ground) on the Black/White.

2. If OK, check the frequency (Hz) on the Yellow wire. A normal reading is about 2,000 Hz at idle, rising to about 10,000 Hz at Wide Open Throttle (WOT).

3. If lower than specification, or erratic, disconnect the MAF sensor and verify there is 5 volts reference from the Powertrain Control Module (PCM) on the Yellow wire.

4. If OK, replace the MAF sensor.

5. If there is 0 volts on the Yellow wire, check for a bad wire to the PCM. If the wiring is OK, replace the PCM.

-I take no credit for this info it was originaly posted by a fella named Kevin-

[/TD]
[/TR]
[/TABLE]