ChinoHillian Posted February 21, 2011 Report Share Posted February 21, 2011 I did a search for the code my truck is throwing and so far from what i have read, is replacing the sensor my best bet? Or should i just get the code tuned out and not worry about it? Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted February 21, 2011 Report Share Posted February 21, 2011 Sounds like it is time for a new Driver's side rear Oxygen sensor....... DTC P0141 CIRCUIT DESCRIPTION The heated oxygen sensor (HO2S) must reach operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensor to reach operating temperature. Voltage is provided to the heater by the ignition 1 voltage circuit through a fuse. With the engine running, ground is provided to the heater by the HO2S heater low control circuit, through a low side driver within the powertrain control module (PCM). The PCM commands the heater ON or OFF to maintain a specific HO2S operating temperature range. The PCM determines the temperature by measuring the current flow through the heater. When the heater is in the ON state, the PCM will pulse the heater OFF for a duration of 50 ms , once per second. When the heater is in the OFF state, the PCM will pulse the heater ON for a duration of 50 ms , once per second. The PCM monitors the heater current with the engine running. This diagnostic will only run once per ignition cycle. If the PCM detects that the heater current is not within an expected range, DTC P0141 sets for HO2S bank 1 sensor 2, or DTC P0161 sets for HO2S bank 2 sensor 2. DTC DESCRIPTORS This diagnostic procedure supports the following DTCs: •DTC P0141 HO2S Heater Performance Bank 1 Sensor 2 •DTC P0161 HO2S Heater Performance Bank 2 Sensor 2 CONDITIONS FOR RUNNING THE DTC •DTCs P0054, P0060, P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0128, P0169, P0178, P0179, P0200, P0220, P0442, P0446, P0452, P0453, P0455, P0496, P1125, P1258, P1516, P2101, P2108, P2135, U0107 are not set. •The ECT Sensor parameter is greater than 50°C (122°F) . •The Ignition 1 Signal parameter is between 10-18 volts . •The Fuel Alcohol content parameter is less than 90 percent . •The MAF Sensor parameter is between 3-40 g/s . •The Engine Speed parameter is between 500-3,000 RPM . •The Engine Run Time parameter is more than 300 seconds . •The above conditions are met for 2 seconds . •This diagnostic runs one time per drive cycle when the above conditions are met. CONDITIONS FOR SETTING THE DTC •The PCM detects that the affected HO2S Heater current parameter is greater than 1.375 amps or less than 0. 25 amps . •The above condition is met for 10 seconds . 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. Quote Link to comment Share on other sites More sharing options...
ChinoHillian Posted February 28, 2011 Author Report Share Posted February 28, 2011 i replaced the sensor on friday with a brand new one but the check engine light is till on. Do i have to get it cleared or will it turn off by on its own? Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted February 28, 2011 Report Share Posted February 28, 2011 A new sensor should fix it, but it will take several ignition cycles to get rid of it. Most chain auto part stores like Advance or Auto Zone will scan and clear codes for free....... Quote Link to comment Share on other sites More sharing options...
ChinoHillian Posted March 28, 2011 Author Report Share Posted March 28, 2011 i replaced the o2 sensor that needed to be replaced and had the code cleared but when i was driving home, the cel came back on. could it be possible that i have a plugged cat? my truck is chewing through gas faster than usual. could that be the problem or would my mpg be affected by the maf and air intake? Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted March 28, 2011 Report Share Posted March 28, 2011 i replaced the o2 sensor that needed to be replaced and had the code cleared but when i was driving home, the cel came back on. could it be possible that i have a plugged cat? my truck is chewing through gas faster than usual. could that be the problem or would my mpg be affected by the maf and air intake? It could be a bad cat........pull the codes and post them up..... Quote Link to comment Share on other sites More sharing options...
ChinoHillian Posted March 29, 2011 Author Report Share Posted March 29, 2011 i went to the dealer and they said it was p0141 and i bought a new o2 sensor. i go home to install it, and i check the o2 sensor lead and the wire was being chewed up by my front drive shaft. the wire was leaning on the driveshaft and it tore through the line and was causing the dtc to pop up. had them order a new lead and they are getting it tomorrow. thanks for the help anyways! Quote Link to comment Share on other sites More sharing options...
67speeda Posted March 29, 2011 Report Share Posted March 29, 2011 (edited) gut cats and get a tune edit: I once had same thing happen and the leads from GM fixed it. Was front O2 though... Edited March 29, 2011 by 67speeda (see edit history) Quote Link to comment Share on other sites More sharing options...
chpspecial Posted March 29, 2011 Report Share Posted March 29, 2011 gut cats and get a tune edit: I once had same thing happen and the leads from GM fixed it. Was front O2 though... He already has a good tune. glad you got it fixed nathan, I know it has been troubling you for a while... Quote Link to comment Share on other sites More sharing options...
ChinoHillian Posted March 29, 2011 Author Report Share Posted March 29, 2011 yeah it was getting annoying seeing that CEL everyday. thanks for the tip btw! Quote Link to comment Share on other sites More sharing options...
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