Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
Powertrain DTC Charts and Descriptions 4-117
Diagnostic Trouble Code (DTC) Charts and Descriptions
P1900 - Output Shaft Speed (OSS) Sensor Circuit Intermittent (Continued) Application Key On Engine Off Key On Engine Running Continuous Memory
Manual Transmission GO to Pinpoint Test DP.
Automatic Transmission Refer to the Workshop Manual Section 307-01, Automatic Transmission, Pinpoint Test Output Shaft
Speed Sensor to continue diagnosis.
P1934 - Vehicle Speed Signal
Description: This DTC sets when there is a sudden loss of vehicle speed signal over a period of time. Vehicle speed data is
received from either the transmission control module (TCM) or the anti-lock brake system (ABS) module.
Possible Causes: • VSS+ circuit open
• VSS- circuit open
• VSS circuit short to ground
• VSS circuit short to voltage
• Damaged drive mechanism for VSS
• Damaged VSS
• Damaged wheel speed sensors
• Damaged wheel speed sensor harness circuits
Diagnostic Aids: Monitor the VSS PID while driving the vehicle. If vehicle speed data is lost, check the TCM or ABS module for
related DTCs.
Application Key On Engine Off Key On Engine Running Continuous Memory
Manual Transmission GO to Pinpoint Test DP.
All others The PCM uses information from the ABS module and the transmission control module (TCM) to
calculate vehicle speed. Check these modules for DTCs.
P1935 - Brake Switch/Sensor Signal
Description: The PCM continuously monitors the controller area network (CAN) for messages from the anti-lock brake
system (ABS) module. This DTC sets when the PCM does not receive the ABS message within the defined amount of time.
Possible Causes: • Communication error
Diagnostic Aids: Check for other ABS DTCs or ABS related symptoms. Diagnose all other ABS DTCs or ABS related symptoms
first.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test QA.
P193C - Steering Wheel Angle Signal
Description:
Possible Causes:
Diagnostic Aids: Check for other module DTCs or related symptoms. Refer to the appropriate Workshop Manual section to
diagnose any other DTCs retrieved. If no other module DTCs are retrieved, follow the Workshop Manual diagnostic routine for steering wheel rotation sensor concerns.
Application Key On Engine Off Key On Engine Running Continuous Memory
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
P193F - Vehicle Speed Signal Intermittent
Description: This DTC sets when the vehicle speed sensor (VSS) input signal was intermittent. This DTC sets when the
PCM detects the vehicle speed signal has been interrupted several times during a drive cycle.
Possible Causes: • VSS connections intermittent
• VSS circuits intermittent short
• VSS circuits intermittent open
• Damaged VSS
2016 Powertrain Control/Emissions Diagnosis, Gasoline Engines, 3/2015
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.