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2004 gmc envoy_sle
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Discussion Starter · #1 ·
Hi, i have this code P0141, i did some research and most people said its the oxygen sensor. I replaced both 02 sensors, before and after the cat, but after clearing the code it comes back on again and my envoy drives sluggish. i did clean the throttle about 2 months ago. i have 65k miles, i dont know if i should put some fuel injection cleaner for a week, then change the fuel filter. does anyone have any advise how to remove this p0141 code?
 

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2004 gmc envoy_sle
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Discussion Starter · #2 ·
Does anyone knows how many o2 sensors there are for the envoy? because i changed the one before the cat and after the cat. maybe there is another one?
 

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2004 gmc envoy_sle
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Discussion Starter · #4 ·
thanks alot, but i did changed both o2 sensors and check the wires and fuse. but the check engine light comes back on with a tdc p0141. have any clue what else i should do?
 

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2003 gmc envoy_slt_xl
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thanks alot, but i did changed both o2 sensors and check the wires and fuse. but the check engine light comes back on with a tdc p0141. have any clue what else i should do?
Just make sure the connector is plugged in correctly. The code refers to the O2 bank2 sensor. It's the one on the exhaust pipe after the cat. It's connector is on the gearbox body.
 

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2004 gmc
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A local member just had a lean running code, and it was his fuel pressure control hose plugged into the wrong place. It needs to be on a small barb on the driver's side edge of the intake resonator. The thing on top of the engine with the engine size molded into it.

That said - P0113 is a problem with the wiring to your IAT sensor. Have you messed with it lately?

DTC P0113

Circuit Description

The intake air temperature (IAT) sensor is a variable resistor. The IAT sensor has a signal circuit and a low reference circuit. The IAT sensor measures the temperature of the air entering the engine. The powertrain control module (PCM) supplies 5 volts to the IAT signal circuit and a ground for the IAT low reference circuit. When the IAT sensor is cold, the sensor resistance is high. When the air temperature increases, the sensor resistance decreases. With high sensor resistance, the PCM detects a high voltage on the IAT signal circuit. With lower sensor resistance, the PCM detects a lower voltage on the IAT signal circuit. If the PCM detects an excessively high IAT signal voltage, indicating a low temperature, DTC P0113 sets.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0112 Intake Air Temperature (IAT) Sensor Circuit High Voltage

Conditions for Running the DTC

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DTCs P0117, P0118, P0125, P0502, P0503 are not set.
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The engine run time is more than 5 minutes.
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The vehicle speed sensor (VSS) indicates that vehicle speed is less than 24 km/h (15 mph).
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DTC P0113 runs continuously when the above conditions are met.

Conditions for Setting the DTC

The PCM detects that the IAT sensor parameter is less than -39°C (-38°F) for more than 6 seconds.

Action Taken When the DTC Sets

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The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
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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

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The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
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A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
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A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
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Clear the MIL and the DTC with a scan tool.


P0141:

DTC P0135 or P0141

Circuit Description

Heated oxygen sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The 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, though 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 and calculating the resistance. Based on the resistance of the PCM can predict the sensor temperature. HO2S 1 uses pulse width modulation (PWM) to control the heater operation. HO2S 2 simply uses ON/OFF commands to control the heater operation. For diagnosis, the PCM monitors the heater current with the engine running. The PCM also calculates the heater resistance on a cold start. Both diagnostics will only run once per ignition cycle. If the PCM detects that the heater current or the heater calculated resistance is not within an expected range, DTC P0135 sets for HO2S 1 or DTC P0141 sets for HO2S 2.

DTC Descriptors

This diagnostic procedure supports the following DTCs:

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DTC P0135 HO2S Heater Performance Sensor 1
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DTC P0141 HO2S Heater Performance Sensor 2

Conditions for Running the DTC

Heater Resistance Test

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DTCs P0068, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0120, P0122, P0123, P0125, P0128, P0201, P0202, P0203, P0204, P0205, P0206, P0220, P0300-P0306, P0315, P0336, P0442, P0446, P0452, P0453, P0455, P0483, P0496, P0506, P0507, P0601, P0602, P0604, P0606, P060D, P060E, P0641, P0651, P1516, P1621, P2101, P2120, P2125, P2135, P2138, P2176 are not set.
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The Engine Coolant Temperature (ECT) Sensor parameter has dropped more than 60°C (140°F) since engine shut down.
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The ECT Sensor parameter is between -20 to +40°C (-4 to +104°F) at engine start-up.
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The ECT Sensor parameter minus the Intake Air Temperature (IAT) Sensor parameter is less than 140°C (284°F) at engine start-up.
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The engine is started.
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DTCs P0135 or P0141 run continuously during the heater resistance test when the above conditions are met.

OR

Heater Current Test

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DTCs P0068, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0120, P0122, P0123, P0125, P0128, P0201, P0202, P0203, P0204, P0205, P0206, P0220, P0300-P0306, P0315, P0336, P0442, P0446, P0452, P0453, P0455, P0483, P0496, P0506, P0507, P0601, P0602, P0604, P0606, P060D, P060E, P0641, P0651, P1516, P1621, P2101, P2120, P2125, P2135, P2138, P2176 are not set.
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The ECT sensor parameter is more than 70°C (158°F).
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The Ignition 1 Signal parameter is between 10-17 volts.
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The Air Flow Calculated parameter is less than 50 g/s.
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The Fuel Level Sensor parameter is more than 10 percent.
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The Engine Run Time parameter is more than 60 seconds.
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DTCs P0135 or P0141 run continuously during the heater current test when the above conditions are met.

Conditions for Setting the DTC

Heater Resistance Test

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For DTCs P0135 or P0141 the PCM detects that the affected HO2S heater calculated resistance is not within an expected range at engine start-up.
*

DTCs P0135 or P0141 set within 200 seconds during the heater resistance test when the above condition is met.

OR

Heater Current Test

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For DTC P0135, the PCM detects that the HO2S 1 Heater Current parameter is more than 2.99 amps or less than 0.80 amps.
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For DTC P0141, the PCM detects that the HO2S 2 Heater Current parameter is more than 1.56 amps or less than 0.217 amps.
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DTCs P0135 or P0141 set within 200 seconds during the heater current test when the above condition is met.

Action Taken When the DTC Sets

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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

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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.
 

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2004 gmc
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It was in the second half of my posting of the GM troubleshooting guide, that included "If the PCM detects that the heater current or the heater calculated resistance is not within an expected range, DTC P0135 sets for HO2S 1 or DTC P0141 sets for HO2S 2."
 

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2004 gmc envoy_sle
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11 Posts
Discussion Starter · #12 ·
I have replaced the intake air temp sensor before and fixed the problem but how can i fix code P0141 i'm still lost sorry about that.
Well when i had code "P0141" what i did was to changed the bottom oxygen sensor. Sensor located after catalytic converter, the 02 sensor located on the exhaust pipe, downstream. make sure you get your 02 sensor from AC Delco brand. because i purchased "Bosch" brand and the check engine light will come back after one day or so, do not get other brand except ac delco. also make sure you check the wires are connected properly. check fuse number 29 which is for your oxygen sensor under the hood fuse box.
if that does not fix the P0141 code, then get a new fuel filter which cost about $16 to $20. there are some post how to change it, very simply.
AC Delco
Part Number: 213-1574
[Heated Oxygen Sensor (Position 2)]
http://parts-catalog.acdelco.com/b2c/catalog_search.php
about $42.
Good luck.
 

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2004 chevy trailblazer_ls
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I had a P1133 set on me before i replaced the HO2S Sensor 2, and now after it's setting P0141. I replaced it with a Bosch. I don't understand why the bosch doesn't work?
 

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2004 gmc envoy_sle
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67 Posts
its weird man i have a bosch sensor after the cat and i checked the conections yesterday and know i dont get code P0141 but i keep getting P0113 and i replaced the air intake sensor and still doesnt recognize anything.
 

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Well code P0141 is gone but I still keep getting code P0113 but I think I found the problem. I ran a diagnostic yesterday and checked everything in live mode to see what's going on. Well both of the sensors work perfectly but I noticed that the air intake sensor indicated that it was -40 but. It was conected I even bought another one and the number wouldn't change it was still at -40 so I was wondering why I made sure it was connected right. Well when I was doing this and looking at the scanner I noticed that when I touched one of the cables(the little yellow cable on the connector) the number went up to 64 72 I don't know if that's the normal temp it should be but so I figured the cable is loose I might have pulled out the cable a bit accidently. Today I'm gonna try to fix that even though I still have the SES light on hopefully it turns off when I fix it. If anybody has P0113 make sure your connectors and cables are making contact. Hope this helps anybody with there prob.
 
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