DTC C2191/91 Vehicle Speed Signal Error (Test Mode DTC): Description
WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
The tire pressure warning ECU and receiver receives a speed signal from the combination meter This DTC is stored upon entering the test mode, and cleared when a vehicle speed signal of 20 km/h (12 mph) is detected for 3 seconds or more The DTC is output only in the test mode.
DTC DETECTING CONDITION CHART
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| C2191/91 | Vehicle speed sensor circuit malfunction |
|