2011-Charge Air System / Mass Air Flow Sensor Signal Deviation Too Low: Notes
For complete wiring diagrams, refer to SYSTEM WIRING DIAGRAMS .
- When Monitored:
With the ignition on.
- Set Condition:
The ECM detects that the Mass Air Flow Sensor Signal circuit is not within a valid range.
| Possible Causes |
|---|
| INTERMITTENT DTC |
| MASS AIR FLOW SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE |
| MASS AIR FLOW SENSOR GROUND CIRCUIT SHORTED TO VOLTAGE |
| IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN OR HIGH RESISTANCE |
| MASS AIR FLOW SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE |
| MASS AIR FLOW SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE |
| MASS AIR FLOW SENSOR SIGNAL CIRCUIT SHORTED TO GROUND |
| MASS AIR FLOW SENSOR SIGNAL CIRCUIT SHORTED TO THE MASS AIR FLOW SENSOR GROUND CIRCUIT |
| MASS AIR FLOW SENSOR |
| ENGINE CONTROL MODULE (ECM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure