Circuit/System Verification
WARNING: This page is about a different variant/trim than selected.
- Ignition - On / Vehicle - In Service Mode
- Verify DTC P0641, P0651, P0697, P06A3, P06D2 is not set.
- If any of the DTCs are set
Refer to: DTC P0641, P0651, P0697, P06A3, or P06D2
- Go to next step: If none of the DTCs are set
- If any 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
- 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
Refer to: DTC P0121-P0123, P0222, P0223, P2135, U0606, or U0607
- Go to next step: If the specified state
- If not the specified state
- 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
- Verify the following conditions do not exist:
- B74 Manifold Absolute Pressure Sensor - Leaking @ O-Ring - Missing / Visible Damage
- B75C Multifunction Intake Air Sensor - Contamination of the measuring element /Cracked/Loose Clamps / Visible Damage/Water intrusion
- Q38 Throttle Body
- Coking/Loose Clamps /Visible Damage
- Restricted - Moisture/Ice
- Air Cleaner Element - Dirty / Restricted
- Catalytic Converter - Blocked / Restricted/Visible Damage
- Engine - Mechanical Condition - Refer to: Symptoms - Engine Mechanical
- Exhaust System - Leaking /Restricted/ Visible Damage - Refer to: Symptoms - Engine Exhaust
- Intake Air Duct - Cracked / Loose Clamps / Restricted / Visible Damage
- Intake Manifold - Cracked / Loose Clamps / Restricted / Vacuum leak/Visible Damage
- Positive Crankcase Ventilation System
- Leaking @ O-Ring - Missing / Visible Damage
- Restricted - Moisture/Ice
- Incorrect connection /Leaking / Restricted
- Vacuum Hoses - Kinked / Leaking / Incorrect connection / Restricted
- Vacuum leak @ Engine - Oil Level Indicator and Tube /Oil Filler Cap
- If a condition exists
Repair or replace the components as necessary.
- Go to next step: If no condition exists
- Engine - Idling - At normal operating temperature
- Verify the scan tool parameter:
- MAP Sensor = 26 to 52 kPa (3.8 to 7.5 PSI) @ Idle Speed
- MAP Sensor = The value should change with accelerator pedal input.
- If not between 26 and 52 kPa (3.8 and 7.5 PSI) or does not change
Refer to: DTC P0106, P0107, or P0108
- Go to next step: If between 26 and 52 kPa (3.8 and 7.5 PSI) and changes
- Increase the engine speed slowly to 3k RPM and then back to idle.
- Perform the scan tool function: Review Stored Data
- Observe the scan tool parameter frame by frame with a scan tool: MAF Sensor
Verify the parameter changes smoothly and gradually in the recorded data as the engine speed was 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
- 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
Repeat the procedure starting at step 1
- Go to next step: If the DTC is not set
- If the DTC sets
- All OK.