OBD codes / P0733
P0733
SeriousGear 3 Incorrect Ratio
A slipping third gear heats the fluid during the most common kind of driving — town speeds and moderate acceleration. Don't keep commuting on it: heat from slip is cumulative and irreversible. Check the fluid now, drive as little and as gently as possible, and get a real diagnosis quickly.
What this code means
P0733 sets when third gear fails the ratio check — commanded third, but the input/output speed math says it's slipping or didn't engage. The per-gear pattern applies: suspicion falls on the specific clutch pack that creates third and on the solenoid and valve-body passage that apply it, after the universal first check of fluid level and condition. Third is a workhorse mid-speed gear, so symptoms show up in the 25–45 mph range: flare on the 2-3 shift, a rubber-band feeling under acceleration, or the transmission skipping past third entirely. One useful pattern: if only P0733 is present, the fault is likely in third's own circuit; if several gear-ratio codes appear together, think systemic — pressure, pump, or fluid — instead of one clutch.
Symptoms you might notice
- RPM flare or slip on the 2-3 shift
- Slipping or surging at mid speeds
- Transmission holds second or jumps to fourth
- Limp mode
- Check-engine light
What it costs to fix
Varies by vehicle — get it diagnosed.
The repair cost for this code depends too much on your exact vehicle and the underlying cause to quote a meaningful range. Confirm the cause first so you only pay for the fix you actually need.
Diagnose P0733 for my vehicle →Frequently asked
Why does my car feel fine except around 30-40 mph?
That's third gear's territory. The other gears' clutches are healthy, so the car drives normally until the transmission needs third — then you feel flare, surge, or a skip. Symptoms confined to one speed band are exactly why per-gear codes are so diagnostic.
Multiple gear ratio codes appeared together — what does that mean?
Several ratio codes at once point away from any single clutch and toward shared causes: low fluid, a tired pump, a clogged filter, or overall pressure loss. One code alone points at that gear's own clutch and solenoid. The pattern meaningfully changes the diagnosis.
Can a solenoid replacement fix P0733?
If testing shows the solenoid or its valve-body passage isn't delivering pressure, yes — and that's a far cheaper outcome than clutch work. If pressure is good and third still slips, the clutch pack itself is worn and the fix is internal.
Is it safe to drive to the shop?
A short, gentle trip is usually fine — stay off the highway if the slip is pronounced, and don't press the accelerator hard through the slipping range. If the transmission bangs, shudders, or loses drive, stop and tow it.
Seeing P0733 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0733 for my vehicleRelated trouble codes
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Generic OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.