P1720 Cadillac Vehicle Speed Meter Circuit Malfunction
Possible causes
– VDC/TCS/ABS to ECM circuit harness is open or shorted
– TCM to ECM circuit harness is open or shorted
– VDC/TCS/ABS to ECM circuit connectors
– TCM to ECM circuit connectors
– Faulty revolution sensor
– TCM to ECM circuit harness is open or shorted
– VDC/TCS/ABS to ECM circuit connectors
– TCM to ECM circuit connectors
– Faulty revolution sensor
What about the obd code?
Malfunction is detected when ECM detects a difference between two vehicle speed sensor signals is out of the specified range.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1720 Cadillac Description
The Engine Control Module (ECM) receives two vehicle speed sensor signals via the Control Area Network (CAN) communication line. One is sent from Vehicle Dynamic Control (VDC) / Traction Control System (TCS) / Anti-Lock Brake System (ABS) control unit, and the other is from Transmission Control Module (TCM). ECM uses these two signals for engine control.
Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT , Cadillac ATS , Cadillac CTS , Cadillac CTS Sedan , Cadillac CTS Sport Sedan , Cadillac CTS-V , Cadillac CTS-V Sedan , Cadillac Catera , Cadillac DTS , Cadillac DeVille , Cadillac STS-V , Cadillac STS , Cadillac Seville , Cadillac XTS , Cadillac XLR , Cadillac XLR Platinum , Cadillac Escalade , Cadillac SRX