OBD-II Generic Error Code P0733: How to Fix It
Medium 2-4 hours High Severity
Verified July 2026
- Error Code
- P0733
- Brand
- OBD-II Generic
- Product Type
- automotive
- Severity
- High
- DIY Difficulty
- Medium
- Estimated Fix Time
- 2-4 hours
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Tools You'll Need
- OBD-II scanner
- Digital multimeter
- Basic hand tools
- Transmission fluid
- Funnel
- Jack and jack stands
- Drain pan
How to Fix Error Code P0733
-
Connect OBD-II Scanner and Record Codes
Never attempt repairs while the engine is running or the vehicle is in motion. -
Check Transmission Fluid Level and Condition
Engine and transmission will be hot - allow cooling time or use protective gloves to prevent burns. -
Inspect Wiring Harnesses and Connectors
Disconnect the battery negative terminal before handling any electrical connections. -
Test Transmission Solenoids
Ensure the transmission is cool and properly supported before removing the pan. -
Perform Transmission Fluid and Filter Change
Dispose of used transmission fluid and filter at an approved recycling center. -
Clear Codes and Test Drive
If harsh shifting, slipping, or other transmission problems occur during test drive, stop immediately and seek professional diagnosis.
Parts You May Need
Transmission fluid
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Transmission filter
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Transmission pan gasket
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Shift solenoids
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OBD-II scanner
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Transmission fluid
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Transmission filter
Check Price on Amazon
Transmission pan gasket
Check Price on Amazon
Shift solenoids
Check Price on Amazon
OBD-II scanner
Check Price on Amazon
Transmission fluid
Check Price on Amazon
Transmission filter
Check Price on Amazon
Transmission pan gasket
Check Price on Amazon
Shift solenoids
Check Price on Amazon
OBD-II scanner
Check Price on Amazon
Transmission fluid
Check Price on Amazon
Transmission filter
Check Price on Amazon
Transmission pan gasket
Check Price on Amazon
Shift solenoids
Check Price on Amazon
OBD-II scanner
Check Price on Amazon
Transmission fluid
Check Price on Amazon
Transmission filter
Check Price on Amazon
Transmission pan gasket
Check Price on Amazon
Shift solenoids
Check Price on Amazon
OBD-II scanner
Check Price on Amazon
Transmission fluid
Check Price on Amazon
Transmission filter
Check Price on Amazon
Transmission pan gasket
Check Price on Amazon
Shift solenoids
Check Price on Amazon
OBD-II scanner
Check Price on Amazon
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When to Call a Professional
Call a qualified transmission specialist if the P0733 code returns after completing these steps, if you discover burnt transmission fluid, if internal transmission components like clutches or bands need replacement, or if you're not comfortable working with transmission components. Internal transmission repairs require specialized tools and expertise.Frequently Asked Questions
What does P0733 error code mean?
P0733 indicates that the transmission control module has detected an incorrect gear ratio in third gear. The actual ratio doesn't match what the computer expects, suggesting a problem with transmission components, fluid, or electronic controls.
Can I drive with P0733 code?
You can drive short distances with caution, but continued driving with P0733 can cause severe transmission damage. The transmission may slip, shift harshly, or fail to engage third gear properly, leading to costly repairs.
What causes P0733 transmission error?
Common causes include low or contaminated transmission fluid, faulty shift solenoids, worn clutch bands or friction plates, blocked transmission filter, damaged valve body, or wiring issues in the transmission control system.
How much does it cost to fix P0733?
Repair costs range from $150-300 for fluid and filter changes or solenoid replacement, up to $2000-4000 for internal transmission rebuilds. The actual cost depends on the root cause and extent of damage.
Will P0733 cause transmission failure?
If left unaddressed, P0733 can lead to complete transmission failure. The incorrect gear ratio puts stress on internal components and can cause clutch burning, band failure, or complete loss of gear engagement.