Multiple codes...Please help

[Glenn]

I have a 2005 Cobalt 2.2l. We need to have it inspected but I can't get rid of the codes. It has two codes that will not go away. P0340 and P1133. We have changed a crank position sensor, the first O2 sensor, spark plugs oil and air filter. We have cleaned the MAF, then unhooked the battery. for a couple of hours. the same codes return. What else could be causing the problem with the codes.

Thank you for your help.

 

[YelloEye]

Found your problem, you changed the wrong sensor.
P0340 Camshaft Position (CMP) Sensor Circuit
That one is probably a toasted camshaft position sensor. ~$32 on Amazon.

P1133 HO2S Insufficient Switching Sensor 1
Follow this like a choose your own adventure book, not like a normal book or you'll just end up replacing everything.

2

1. Start the engine.
2. Allow the engine to reach operating temperature. Refer to Scan Tool Data List .
3. Operate the engine at 1,500 RPM for 30 seconds.
4. Observe the HO2S 1 voltage parameter with a scan tool.

• Is the HO2S 1 voltage parameter varying above and below the specified range? 300-600 mV

Yes: Go to Step 3
No: Go to Step 4

3

1. Observe the Freeze Frame/Failure Records for this DTC.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.

• Did the DTC fail this ignition?

--
Yes: Go to Step 4
No: Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

4

1. Turn OFF the ignition.
2. Disconnect the heated oxygen sensor (HO2S) 1.
3. Turn ON the ignition, with the engine OFF.
4. Observe the HO2S 1 voltage parameter with a scan tool.

• Is the HO2S 1 voltage parameter less than the specified value? 100 mV

Yes: Go to Step 6
No: Go to Step 5

5

• Is the HO2S 1 voltage parameter more than the specified value? 800 mV

Yes: Go to Step 7
No: Go to Step 9

6

1. Test the HO2S 1 high signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

• Did you find and correct the condition?

--
Yes: Go to Step 17
No: Go to Step 8

7
Important: The sensor may be damaged if the circuit is shorted to a voltage source.

1. Test the HO2S 1 high signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

• Did you find and correct the condition?

--
Yes: Go to Step 17
No: Go to Step 16

8

1. Test the HO2S 1 high signal circuit for a short to the HO2S low signal circuit or to the HO2S heater low control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

• Did you find and correct the condition?

--
Yes: Go to Step 17
No: Go to Step 16

9

1. Connect a 3-amp fused jumper wire between the high signal circuit of the HO2S 1 harness connector on the engine harness side and a good ground.
2. Observe the HO2S 1 voltage parameter with a scan tool.

• Is the HO2S 1 voltage parameter less than the specified value? 100 mV

Yes: Go to Step 10
No: Go to Step 12

10

1. Remove the jumper wire from the previous step.
2. Connect a 3-amp fused jumper wire between the high signal circuit of the HO2S 1 harness connector on the engine harness side and the low signal circuit of the HO2S 1 harness connector on the engine harness side.
3. Observe the HO2S 1 voltage parameter with a scan tool.

• Is the HO2S 1 voltage parameter less than the specified value? 100 mV

Yes: Go to Step 13
No: Go to Step 11

11

1. Test the HO2S 1 low signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

• Did you find and correct the condition?

--
Yes: Go to Step 17
No: Go to Step 14

12

1. Test the HO2S 1 high signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

• Did you find and correct the condition?

--
Yes: Go to Step 17
No: Go to Step 14

13

1. Test for an intermittent and for a poor connection at the HO2S 1. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

• Did you find and correct the condition?

--
Yes: Go to Step 17
No: Go to Step 15

14

1. Test for an intermittent and for a poor connection at the engine control module (ECM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

• Did you find and correct the condition?

--
Yes: Go to Step 17
No: Go to Step 16

15
Notice: Refer to Silicon Contamination of Heated Oxygen Sensors Notice in the Preface section.

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.

1. Replace the HO2S 1. Refer to Heated Oxygen Sensor 1 Replacement .

• Did you complete the replacement?

--
Yes: Go to Step 17
--

16

1. Replace the ECM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

• Did you complete the replacement?

--
Yes: Go to Step 17
--

17

1. Clear the DTCs with a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.

• Did the DTC fail this ignition?

--
Yes: Go to Step 2
No: Go to Step 18

18

1. Observe the Capture Info with a scan tool.

• Are there any DTCs that have not been diagnosed?

--
Yes: Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information
No: System OK

I spent entirely too long formatting that.

 

[Bass_Waves]

Lol I bet

 

[Glenn]

Thank you for the reply. My response is that we do not have the camshaft position sensor. No one can find it in the parts houses. It does not exist. Second question would be this. To measure voltages and such on this O2, do I cut a small bit of insulation off of wires to bet the readings. This is pretty new to me. Thanks again.

 

[YelloEye]

Checked RockAuto?

To get readings you should be using a scan tool. A $15 obd2 to Bluetooth dongle and the Torque app for android works. I wouldn't strip insulation.

 

[gberland]

It's never usually a good thing to cut or expose your wiring insulation if u don't have to instead try back probing the connector on the 02 sensor with some back probe needles

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