PowertrainP077C
CautionSeverity: Caution - get it checked when you can
Output Shaft Speed Sensor Circuit Low
Key terms: SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions
1What it means in plain English
This range normally covers the transmission control system, but some manufacturers use P07-P09 codes for unrelated functions (fuel pump control, air-mix motors, lighting or windows). Check the description before assuming it is a transmission fault.
2Common causes
- Low or dirty transmission fluid
- Faulty shift solenoid
- Faulty speed sensor
- Wiring or connector fault
- Internal transmission wear
3Can I drive?
If the transmission slips, jerks, will not shift, or a transmission temperature warning is on, stop driving and let it cool: continuing can cause expensive damage. If the code names a different system (for example the fuel pump), treat it on its own terms; a fuel-pump control failure can stall the car, so have it checked before driving further. Otherwise drive gently to a workshop.
This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.
4Brand data 21
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P077C | Output Shaft Speed Sensor Circuit Low SAE | Powertrain |
| Chrysler | P077C | Output Speed Sensor Circuit Low Brand | Powertrain |
| Daewoo | P077C | Output Shaft Speed Sensor Circuit Low SAE | Powertrain |
| EOBD | P077C | Output shaft speed sensor circuit low Brand | Powertrain |
| Fiat | P077C | Output speed sensor circuit low Brand | Powertrain |
| GM | P077C | Output Shaft Speed Sensor Circuit Low SAE | Powertrain |
| Holden | P077C | Output Speed Sensor Circuit Low Voltage Brand | Powertrain |
| Honda | P077C | Output Shaft Speed Sensor Circuit Low SAE | Powertrain |
| Isuzu | P077C | Output Shaft Speed Sensor Circuit Low SAE | Powertrain |
| Land Rover | P077C | Output Shaft Speed Sensor Circuit Low Brand | Powertrain |
| Maserati | P077C | Output Shaft Speed Sensor Circuit Low Brand | Powertrain |
| Mitsubishi | P077C | Output shaft speed sensor low Brand | Powertrain |
| Nissan | P077C | Output Shaft Speed Sensor Circuit Low SAE | Powertrain |
| Opel | P077C | Output Shaft Speed Sensor Circuit Low SAE | Powertrain |
| Peugeot | P077C | Output Shaft Speed Sensor Circuit Low SAE | Powertrain |
| Proton | P077C | Output shaft speed sensor low Brand | Powertrain |
| Saab | P077C | Output Shaft Speed Sensor Circuit Low SAE | Powertrain |
| MG (SAIC) | P077C | TOSS (Output Speed Sensor)- open/ground short Brand | Powertrain |
| Subaru | P077C | Output Shaft Speed Sensor Circuit Low SAE | Powertrain |
| Suzuki | P077C | Output Speed Sensor Circuit Low Brand | Powertrain |
| Toyota | P077C | Output shaft speed sensor circuit low Brand | Powertrain |
Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.
5Extended variant codes 2
These 7-character codes are manufacturer-specific variants of P077C and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P077C00 | Rpm sensor 'Output shaft' has a short circuit to ground. Brand | Powertrain |
| SsangYong | P077C00 | Output speed sensor circuit short to ground Brand | Powertrain |
6Related codes
Browse Pxxx codes or P077xx codes.