DTC C2191/91: Vehicle Speed Signal Error (Test Mode DTC): Description
WARNING: This page is about a different car, the 2006 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
The tire pressure monitor ECU receives a speed signal from the combination meter. This DTC is stored upon entering test mode but erased when a vehicle speed signal of 12 mph (20 km/h) is detected for 3 seconds or more. The DTC is output only in test mode.
DTC TROUBLE DETECTION REFERENCE
| DTC No. | DTC Detecting Condition | Trouble Area |
|---|---|---|
| C2191/91 | Speed sensor circuit malfunction. |
|