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05-15-2009, 12:53 AM | #1 | |
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Trouble Code P1133
I drive an '03 with a 4.8, and after a huge fiasco with the dealership, and swapping and cleaning MAFs, my truck is throwing the P1133 code. I've checked the Haines manual and it states that it is "Oxygen sensor insufficient switching (pre-converter sensor, left bank). What does this mean exactly? Ive checked the other threads related to this, and I noticed the cats were mentioned. Only problem is I have none, and Nelson Performance adjusted the tune accordingly. Any suggestions as to what is causing this? Many thanks.
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05-15-2009, 09:53 AM | #2 | ||
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Re: Trouble Code P1133
Quote:
swap the driver side O2 with the passenger side see if the code moves if so it is just the O2 sensor.. many of these vehicles have had O2 wiring issues driver side ,,,very hard to access this side.. this operation [no cats]is illegal and you are lucky the dealership did not report you...if this is a registered for road use... |
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05-15-2009, 09:45 PM | #3 | |
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Re: Trouble Code P1133
you sure it's not p0133?
http://www.obd-codes.com/p0133 |
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05-16-2009, 11:09 AM | #4 | |
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Re: Trouble Code P1133
I just checked this morning, and made sure it is P1133.
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05-16-2009, 05:12 PM | #5 | |
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Re: Trouble Code P1133
some help from other sites
P1133 - Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 1 Sensor You will need to check the output signal from this O2 sensor, if the voltage low (.10-.25 volts) try spraying propane into the air cleaner to see if the O2 volts go up, it should go to around .75 volts, if nothing happens then the O2 sensor is bad, bank #1 O2 is on the same side as #1 cylinder Check the connections to the four O2 sensors first to make certain they are not corroded. There is no way to tell which sensor is bad by the code. You need a scan tool to monitor the individual voltages to know which is bad. This falls into the category of take it to the dealer which may not be a bad idea. The O2 sensors are covered under warranty. My Vette, a 2003 Z06 just had one of the catalytic converters replaced under warranty. Warranty on emissions for 2003 year cars is 8 years from delivery or 80,000 miles. It doesn't matter if you are the original owner or not, it is still covered. Newer model cars are covered for ten years or 100,000 miles. I don't recall the year the length of warranty changed. and they say that your o2 sensors still might be under warranty http://www.epa.gov/obd/warranties.htm |
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05-16-2009, 06:46 PM | #6 | |
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Re: Trouble Code P1133
Would it be a bad idea to just replace the sensor when I got to my muffler guy? Exhaust has to be redone because it'll be cut off for my lift kit. Thanks for the information.
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05-16-2009, 06:55 PM | #7 | |
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Re: Trouble Code P1133
That's what I would do, if you've got over 100k miles on it they should be replaced anyway, plus that code almost has to be a bad sensor. If the voltage was high/low there would be a code for that, so that rules out a bad connection, low switching (from what I have seen) is always the sensor. Have both upstream sensors replaced, having one new and one old one can cause a slight power imbalance between the banks that can cause it to run worse than with two old sensors.
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05-16-2009, 08:26 PM | #8 | |
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Re: Trouble Code P1133
Actually, how difficult would this be to do myself? I'm askin now cause I haven't had a chance to go look and find them. Again, thanks for the help and quick responses
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03-29-2012, 04:15 AM | #9 | |
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Re: Trouble Code P1133
I have a 2001 Silverado 5.3, i was getting the 071and 074 codes then the 1133 pop up, clear the codes and the 1133 came back. Changed out both oxygen sensors but the P1133 still came back. What can be the problem?
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03-29-2012, 08:02 AM | #10 | ||
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Re: Trouble Code P1133
Quote:
another failure would be the fuel regulator is leaking. intake manifold vac leak. see if you have the proper fuel pressure and the pressure does not rapidly fall off with key on engine off. pull vac line off reg see if fuel comes out or strong smell of fuel. |
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03-29-2012, 10:03 PM | #11 | ||
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Re: Trouble Code P1133
Quote:
Thanks, I'll check everything again tomorrow. I also replace the fuel regulator last month. |
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04-09-2012, 10:58 PM | #13 | |
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Re: Trouble Code P1133
" name=forward
Document ID# 840348 2003 Chevrolet Chevy C Silverado - 2WD DTC P1133 or P1153 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. Heating elements inside the HO2S minimize the time required for the sensors to reach operating temperature. The powertrain control module (PCM) supplies the HO2S with a reference, or bias, voltage of about 450 mV. When the engine is first started the PCM operates in open loop, ignoring the HO2S voltage signal. Once the HO2S reaches operating temperature and closed loop is achieved, the HO2S generates a voltage within a range of 0-1,000 mV that fluctuates above and below bias voltage. High HO2S voltage indicates a rich exhaust stream; low HO2S voltage indicates a lean exhaust stream. This diagnostic will only run once per ignition cycle. The PCM monitors the number of rich-to-lean and lean-to-rich transitions. A transition is defined as, the HO2S voltage changes from above 625 mV to below 250 mV or from below 250 mV to above 625 mV. If the PCM detects that the number of transitions were less than a specified value, DTCs P1133 or P1153 will set. Conditions for Running the DTC DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0131, P0132, P0134, P0135, P0151, P0152, P0154, P0155, P0200, P0220, P0300, P0442, P0446, P0452, P0453, P0455, P0496, P1125, P1258, P1514, P1515, P1516, P1518, P2108, P2135 are not set. The ECT Sensor parameter is more than 65°C (149°F). The EVAP Purge Solenoid Command parameter is more than 1 percent. The MAF Sensor parameter is between 23-50 g/s. The Engine Speed parameter is between 1,200-3,000 RPM. The TP Indicated Angle parameter is 5 percent more than the value observed at idle. The Loop Status parameter is closed. The Ignition 1 Signal parameter is between 10-18 volts. The Fuel Tank Level Remaining parameter is more than 10 percent. The Engine Run Time parameter is more than 160 seconds. The above conditions are met for 50 seconds. Conditions for Setting the DTC The PCM detects that the affected HO2S lean-to-rich or rich-to-lean transitions are less than a calibrated value. 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. Test Description The number below refers to the step number on the diagnostic table.
Step Action Value(s) Yes No Schematic Reference: 1 Did you perform the Diagnostic System Check-Engine Controls? --Go to Step 2 Go to Diagnostic System Check - Engine Controls 2
Is the HO2S voltage parameter varying above and below the specified range? 250-625 mVGo to Step 3 Go to Step 4 3
Did the DTC fail this ignition? --Go to Step 4 Go to Intermittent Conditions 4
Is the HO2S voltage parameter less than the specified value? 100 mVGo to Step 6 Go to Step 5 5 Test the HO2S high signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. --Did you find and correct the condition? Go to Step 12 Go to Step 9 6
Is the HO2S voltage parameter less than the specified value? 100 mVGo to Step 8 Go to Step 7 7 Test the HO2S low signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. --Did you find and correct the condition? Go to Step 12 Go to Step 9 8 Test for an intermittent and for a poor connection at the HO2S. Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Wiring Systems. --Did you find and correct the condition? Go to Step 12 Go to Step 10 9 Test for an intermittent and for a poor connection at the PCM. Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Wiring Systems. --Did you find and correct the condition? Go to Step 12 Go to Step 11 10 Important The HO2S may be damaged due to contamination. Prior to replacing the HO2S inspect for the following sources of contamination: --A silicon contaminated HO2S Fuel contamination--Refer to Alcohol/Contaminants-in-Fuel Diagnosis . Engine oil consumption--Refer to Oil Consumption Diagnosis in Engine Mechanical. Engine coolant consumption--Refer to Loss of Coolant in Engine Cooling. Replace the affected HO2S. Refer to Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 1 or Heated Oxygen Sensor (HO2S) Replacement Bank 2 Sensor 1 . Did you complete the replacement? Go to Step 12 -- 11 Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement . --Did you complete the replacement? Go to Step 12 -- 12
Did the DTC fail this ignition? --Go to Step 2 Go to Step 13 13 Observe the Capture Info with a scan tool. --Are there any DTCs that have not been diagnosed? Go to Diagnostic Trouble Code (DTC) List System OK " name=forward Document ID# 840348 2003 Chevrolet Chevy C Silverado - 2WD
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04-09-2012, 10:59 PM | #14 | |
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Re: Trouble Code P1133
that is the gm service manual repair info for a 2003 chevy silverado 4.8L 2wd.. should be comparable to 4wd as well... hope that info helps resolve your issue
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4x4Junkie 2012 silverado 1500 ext. cab LT Z71 4x4 with allstar package 5.3L V8 Flexfuel with 6 speed AT Onstar / Sirius XM Factory Tow Package Electric Brake Controller Silver Ice Metallic 265/65/18 Wifes Vehicle 2014 Kia Sorento EX AWD 3.3L V6 Toys 2007 Yamaha VStar Silverado 1086cc 45 degree vtwin Grey and Silver GPS positioning locator installed |
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