Circuit/System Verification
WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
If you were sent here from DTC P0068, P0101, P010B, P0106, P0236, P1101 - Refer to: Circuit/System Testing.
- Ignition - On / Vehicle - In Service Mode
- Verify DTC P0601-P0606, P06A3, P16F3 is not set.
- If any of the DTCs are set
- Go to next step: If none of the DTCs are set
- Verify the scan tool parameter:Throttle Body Idle Air Flow Compensation = Less than 90%
- If 90% or greater
Refer to:Throttle Body Cleaning
- Go to next step: If less than 90%
- If 90% or greater
- Verify DTC P0122, P0123, P0222, P0223, P16A0, P16A1, P16A2, P2135 is not set.
- If only DTC P0122, P0123, P0222, P0223, P2135 is set
Test or replace the component:Q38 Throttle Body
- If DTC P16A0, P16A1, P016A2 and one or more of the DTCs P0122, P0123, P0222, P0223, P2135 is set
Refer to: Circuit/System Testing
- Go to next step: If none of the DTCs are set
- If only DTC P0122, P0123, P0222, P0223, P2135 is set
- Perform the scan tool control function:Throttle Sweep - Start
Verify the scan tool parameter:Throttle Position Sensors 1 and 2 = Agree
- If not the specified state
Test or replace the component:Q38 Throttle Body
- Go to next step: If the specified state
- If not the specified state
- Verify DTC P0122, P0123, P0222, P0223, P16A0, P16A1, P16A2, P2135 is not set.
- If any of the DTCs are set
Refer to: Circuit/System Testing
- Go to next step: If none of the DTCs are set
- If any of the DTCs are set
- Verify the scan tool parameter:MAP Sensor - The value should be within the range listed in the table:Altitude Versus Barometric Pressure
- If not in the specified range
Refer to:DTC P0106, P0107, or P0108
- Go to next step: If in the specified range
- If not in the specified range
- Engine - Running
- Verify the scan tool parameter:MAP Sensor = 26 to 52 kPa (3.8 to 7.5 PSI) - The value should change with accelerator pedal input.
- If not in the specified range or does not change
Refer to:DTC P0106, P0107, or P0108
- Go to next step: If in the specified range and changes
- If not in the specified range or does not change
- Observe the scan tool parameter:MAF Sensor & Engine Speed.
- Increase the engine speed slowly to 3, 000 RPM and then back to idle.
- Verify the scan tool parameter:MAF Sensor Bank 1 & MAF Sensor Bank 2 = The value should change smoothly and gradually as the engine speed is increased and decreased.
- If the value does not change smoothly and gradually
Refer to:DTC P0101
- Go to next step: If the value changes smoothly and gradually
- If the value does not change smoothly and gradually
- Verify the following parameters are within 3 kPa (0.4 PSI) of each other:
- Barometric Pressure Sensor Bank 1
- Barometric Pressure Sensor Bank 2
- Boost Pressure Sensor
- If not in the specified range
Refer to:DTC P0236, P0237, or P0238 ,
- Go to next step: If in the specified range
- 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 data.
Verify the DTC does not set.
- If the DTC sets
Refer to: Circuit/System Testing
- Go to next step: If the DTC does not set
- If the DTC sets
- All OK.