P0991

DTC P0991, sometimes indicated as P099100 is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the transmission (gearbox) causing transmission fluid pressure sensor/switch "e" circuit intermittent.

• P0991: Transmission Fluid Pressure Sensor/Switch "E" Circuit Intermittent
• P0991: Trans Fluid Press Sensor/Switch E CKT Intermittent
• P0991: Transmission fluid pressure (TFP) sensor E – circuit
• P0991: Transmission fluid pressure (TFP) switch E – circuit
• P0991 00: Transmission fluid pressure (TFP) sensor E - circuit intermittent
• P0991 00: Transmission fluid pressure (TFP) switch E - circuit intermittent