Help with Trouble Codes, Please!

How long have you had the long tube headers? From what I have heard the longtubes can cause these codes. With your laptop do you have capability to watch fuel trim and the switch rate of the O2 sensors. Was you switch chip calibrated for the headers? Check long and short fuel trim if normal I would look at fuel pressure. Your problem shouldnt be with the O2 sensors it would be unlikley they both failed at exactly the same time.

well those 2 codes are for the front two o2's, so your mils are alright. the only thing that i can think of would be that maybe you've only been going for short trips in your car & the o2's weren't at their operating temperature for a while & it threw codes for the front 2 because the reason you will get codes from the o2's with longtubes, is because the o2's are farther back. and o2 sensors don't work properly if not a certain temperatures. i could be wrong on this, but i'm sure someone will correct me if i'm wrong

c2see21 said:

well those 2 codes are for the front two o2's, so your mils are alright. the only thing that i can think of would be that maybe you've only been going for short trips in your car & the o2's weren't at their operating temperature for a while & it threw codes for the front 2 because the reason you will get codes from the o2's with longtubes, is because the o2's are farther back. and o2 sensors don't work properly if not a certain temperatures. i could be wrong on this, but i'm sure someone will correct me if i'm wrong

Click to expand...

no, you're right, I called a 4.6 guru/ specialist in baltimore because I have the SAME 2 02 codes. your 02's are fine, has it been cool where you have been lately? usually when you live in a warm climate, you don't have a problem because the 02's can heat up ALOT faster after startup properly. I live in wisconsin and got these codes ALL winter, I'm assuming they will go away when it gets nice and sticky in the summer. not sure about the P1000, but the other 2 are not hurting your car or performance at all, it's just the annoyance of the SES light being on, I just periodically check the codes with my OBD2 scanner

P.S. - i can't give you details, but certain header manifold wrap, as well as certain chips and a tune can cure that. but it just makes the light go away, doesn't hurt or help performance.

el_kid_1 said:

I have had the LT headers for a year now. This is the first time the SES light is on since then. And yes, with AutoTap I have the capability to watch for fuel trim. What values should I be seen?

Click to expand...

Long and short fuel trim will be shown in a percentage. normally any percentage greater than +or- 15% could indicate a problem. Then I would check for normal fuel pressure. If all is normal it is likley the O2 sensors are not reaching optimum operating temp. I have heard some type of header heat wrap can help.

Diagnostic Trouble Code

P0133 - HO2S Sensor Circuit Slow Response (HO2S-11)

Description

The HEGO Monitor checks the HO2S Sensor frequency and amplitude. If during testing the frequency and amplitude were to fall below a calibrated limit, the test will fail.

Possible causes

Contaminated HO2S sensor.
Exhaust leaks.
Shorted /open wiring.
Improper fueling.
MAF sensor.
Deteriorating HO2S sensor.
Inlet air leaks.

Diagnostic

Access HO2S test results from the Generic OBD-II menu to verify DTC.


DTC

P1000 - Monitor Testing Not Complete

Description

The on board diagnostic II (OBD II) monitors are performed during the OBD II Drive Cycle. The DTC will be stored in continuous memory if any of the OBD II monitors do not complete.

Possible causes

Vehicle is new from the factory
Battery or PCM had recently been disconnected
An OBD II monitor failure had occurred before completion of an OBD II drive cycle
PCM DTCs have recently been cleared with a scan tool
PTO circuit is shorted to VPWR or B+ or PTO is on during testing

Diagnostic

The DTC does not need to be cleared from the PCM except to pass an inspection/maintenance test.