P0728: The engine speed input fails now and then
The engine speed input fails now and then. It is usually the part, its wiring or a connector with poor contact.
| Code | P0728 |
|---|---|
| System | Engine and transmission |
| Group | P07xx, Transmission |
| Type | Generic: it means the same on every make |
How to read and clear P0728 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P0728 with its description and whether it’s confirmed, pending or permanent.
This code is usually stored by the gearbox control unit. If the car reports it over standard OBD, you read it for nothing with FREE; to read it straight from the gearbox control unit, with its description and clearing, you need PRO.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P0724 The brake switch B circuit has a high signal
- P0725 Engine speed input to gearbox: circuit fault
- P0726 The engine speed input gives readings outside the normal range
- P0727 The engine speed input has no signal
- P0729 Incorrect gear ratio in sixth gear
- P072A The gearbox is stuck in neutral
- P072B The gearbox is stuck in reverse
- P072C The gearbox is stuck in gear 1
- P0700 Transmission control system: fault detected
- P0701 Transmission control system: range/performance
- P0702 Transmission control system: electrical fault
- P0703 Torque converter/brake switch B: circuit fault
What does code P0728 mean?
The engine speed input fails now and then. It is usually the part, its wiring or a connector with poor contact.
How do you clear P0728?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P0728 comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
