Symptoms of P0733
- Harsh, delayed, or slipping shifts, or being stuck in one gear.
- Check-engine light, sometimes with limp-home mode.
- Flaring RPM or a shudder under load.
Common causes of P0733
- Low or degraded transmission fluid.
- A failing speed sensor, shift solenoid, or pressure-control circuit.
- Wiring, connector, or internal hydraulic/mechanical faults.
Useful checks before replacing parts
- Review input speed, output speed, commanded gear, actual ratio, slip data, fluid temperature, and pressure-control data.
- Check related solenoid, speed sensor, and pressure codes that can explain why third gear ratio is wrong.
- Identify whether the fault occurs during the 2-3 shift, in steady third gear, or only under load.
How serious is P0733, and can you keep driving?
- Urgency
- High
- Safe to drive?
- If it is slipping, flaring, or shifting harshly — recover it, do not drive it.
Transmission codes are the ones worth taking seriously on the day. Slip and harsh engagement generate heat and debris, and both of those damage the clutches and valve body further every mile you add. Many vehicles will fall back to a limp mode that holds a single gear to protect the unit; that is the transmission asking to be trailered, not a mode to commute in. Check the fluid level and condition before anything else — it is free, and it is a genuinely common root cause.
Clearing P0733, and making it stay gone
Clearing P0733 with a scan tool switches the lamp off; it does not fix anything, and it throws away the freeze-frame snapshot the car saved when the fault set. That snapshot is the most useful diagnostic evidence you have, because it records the load, RPM and temperature at the moment the test failed. Read it before you erase it.
Left alone, the lamp goes out on its own once the monitor that failed runs and passes on three consecutive driving cycles. The code stays in history after that, which is how a workshop can still see it. Disconnecting the battery is not a shortcut — it clears the stored codes and every learned fuel-trim value with them, so the car relearns from scratch and the underlying fault simply sets the code again.
On vehicles from roughly 2010 onward there is also a permanent DTC, which no scan tool can erase at all. It clears only when the monitor genuinely passes. That is deliberate: it stops a code being wiped in the car park outside an emissions test.
What P0733 costs to put right
There is no honest single figure for P0733, and any page that gives you one is guessing. The code names a circuit or a failed monitor, not a part — the same code can be a chafed wire, a connector full of water, or the component itself, and those are three very different bills.
The number worth budgeting for is diagnostic time. An hour of it is almost always cheaper than the second part you buy after the first one does not fix it, and parts fitted on a guess are rarely refundable once installed. If you are getting a quote, ask what the diagnosis found rather than what is being replaced — a transmission fault traced to a specific cause is a repair, and a list of parts is a hopeful shopping list.
Questions people ask about P0733
What does P0733 mean?
P0733 indicates gear 3 incorrect ratio. The controller calculates a third gear ratio outside expected limits.
Can I drive with P0733?
If it is slipping, flaring, or shifting harshly — recover it, do not drive it. Transmission codes are the ones worth taking seriously on the day. Slip and harsh engagement generate heat and debris, and both of those damage the clutches and valve body further every mile you add. Many vehicles will fall back to a limp mode that holds a single gear to protect the unit; that is the transmission asking to be trailered, not a mode to commute in. Check the fluid level and condition before anything else — it is free, and it is a genuinely common root cause.
What causes P0733?
The usual candidates are low or degraded transmission fluid; a failing speed sensor, shift solenoid, or pressure-control circuit; wiring, connector, or internal hydraulic/mechanical faults. The code tells you which test failed, not which of those did it — that is what the checks on this page are for.
Will P0733 clear itself?
Left alone, the lamp goes out on its own once the monitor that failed runs and passes on three consecutive driving cycles. The code stays in history after that, which is how a workshop can still see it. Disconnecting the battery is not a shortcut — it clears the stored codes and every learned fuel-trim value with them, so the car relearns from scratch and the underlying fault simply sets the code again.
Does P0733 mean I need to replace a part?
Do not rebuild from P0733 alone; verify speed data, fluid state, solenoid command, and pressure first.
How much does it cost to fix P0733?
There is no honest single figure for P0733, and any page that gives you one is guessing. The code names a circuit or a failed monitor, not a part — the same code can be a chafed wire, a connector full of water, or the component itself, and those are three very different bills.
Related OBD-II codes
These nearby transmission entries can help compare wording and pin down the fault area.