Threw a code...Need help

[OneQuickGT1]

I went to Autozone because the code popped up. I believe it was something like no O2 sensor activity detected. Maybe PO0140 or something like that. I am pretty sure it is because of the Random Tech DP/Cat. I guess I will have to deal with it until I drive home on Friday for break. Any thoughts on this would be appreciated. Also, if anyone thinks this is not related to the RT DP/Cat, please let me know.

Brett

[iceman]

DTC P0140
Circuit Description
The powertrain control module (PCM) supplies a bias voltage of about 450 mV between the heated oxygen sensor (HO2S) signal circuit and the HO2S low signal circuit. When measured with a 10-megohm digital voltmeter, this voltage may display as low as 350 mV. The oxygen sensor signal varies from about 800 mV when the exhaust is rich, to about 50 mV when the exhaust is lean. The PCM constantly monitors the HO2S signal during Closed Loop operation. The PCM then compensates for a rich or lean condition by decreasing or increasing the injector pulse width as necessary. If the HO2S 2 voltage remains at or near the 450 mV bias for an extended time, DTC P0140 will set.

Conditions for Running the DTC
DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442, P0443, P0446, P0449, or P1441 are not set.
The engine has been running for at least 4 minutes.
Conditions for Setting the DTC
The HO2S 2 signal voltage remains between 412-500 mV for up to 90 seconds.
The ignition voltage should be more than 9 volts and less than 18 volts.
The test only runs once per trip.
A throttle position (TP) sensor change of more than 8 percent at least twice during the test.
Action Taken When the DTC Sets
The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
Conditions for Clearing the MIL/DTC
The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
Clear the MIL and the DTC with a scan tool.

[OneQuickGT1]

So, would anyone venture a guess as to why this went on? I am guessing it is the DP/Cat. Any other ideas??

[OneQuickGT1]

Anyone??

[MetaGTP1]

Originally posted by OneQuickGT1
Anyone?? My RT Downpipe blew a code. It came out to "Low Catalyst Efficiency".:confused: