Circuit/System Verification
- Verify that the following DTCs are not set:
- 5 V reference circuits
- Camshaft position system performance
- Engine controls ignition relay circuits
- Ignition circuits-body control module (BCM)
- Verify that restrictions do not exist in the exhaust system. Refer to Restricted Exhaust
for further diagnosis.
- Engine idling, observe the scan tool MAF Sensor parameter. The reading should be between 2.5-8.8 g/s depending on the engine coolant temperature (ECT) and barometric (BARO) pressure.
- Verify the scan tool MAF Sensor g/s parameter changes smoothly and gradually as the engine speed is increased and decreased while performing the actions listed below.
- Engine idling
- Perform the scan tool snapshot function.
- Increase the engine speed slowly to 3,000 RPM and then back to idle.
- Exit from the scan tool snapshot and review the data.
- Observe the MAF Sensor parameter frame by frame with a scan tool.
- Verify the proper operation of the ECT sensor and IAT sensor 1. A skewed or stuck ECT sensor and IAT sensor 1 will cause the calculated models to be inaccurate and may cause this DTC to run/fail when it should not. Refer to Temperature Versus Resistance - Intake Air Temperature Sensor (Hitatchi Sensor)
table.
- Verify the proper operation of the MAP sensor. A skewed MAP sensor will cause the BARO value to be inaccurate. Refer to DTC P0106 for further diagnosis.
- Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.