DTC P0548 / P0549
Precautions: General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P0548: Exhaust Gas Temperature Sensor Circuit Low (Bank 2 Sensor 1) Measured voltage of EGT sensor-3 signal circuit is lower than specified value. (1 D/C detecting logic) |
•EGT sensor-3 and/or its circuit
•ECM |
|
P0549: Exhaust Gas Temperature Sensor Circuit High (Bank 2 Sensor 1) Measured voltage of EGT sensor-3 signal circuit is higher than specified value. (1 D/C detecting logic) |
Circuit Diagram
| [A]: | ECM connector (View: [a]) | A2: | EGT sensor-3 ground circuit | 2. | EGT sensor-3 |
| A1: | EGT sensor-3 signal circuit | 1. | ECM |
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “Engine and Emission Control System Check” performed?
|
Go to Step 2.
|
|
| 2 |
EGT sensor-3 signal circuit and ground circuit check
1)Check “A1” and “A2” circuits according to Step 2 of EGT Sensor-3 Check:D16AA.
Is check result OK?
|
Go to Step 3.
|
Repair or replace defective wire harness.
|
| 3 |
EGT sensor-3 check
1)Check EGT sensor-3.
Is check result OK?
|
Replace ECM and recheck parameter.
|
Replace EGT sensor-3.
|