P0733 2018 GMC Sierra Code - Transmission 3rd Gear Ratio Incorrect
Quick Answer
The P0733 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates that the transmission's 3rd gear ratio is incorrect. Common causes include Low transmission fluid levels, Faulty transmission solenoid, Malfunctioning TCM. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0733 2018 GMC Sierra indicates Transmission 3rd Gear Ratio Incorrect.
- Common causes
- Common causes include Low transmission fluid levels, Faulty transmission solenoid, Malfunctioning TCM.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0733 2018 GMC Sierra Description
The P0733 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates that the transmission's 3rd gear ratio is incorrect. This means that the vehicle's transmission is not shifting into 3rd gear properly, leading to potential performance issues. The transmission control module (TCM) monitors the gear ratios during operation, and when it detects that the 3rd gear ratio is outside of the expected range, it triggers the P0733 code.
Common Causes of P0733 2018 GMC Sierra
- Low transmission fluid levels
- Faulty transmission solenoid
- Malfunctioning TCM
- Worn-out clutch packs
- Internal mechanical issues within the transmission
Symptoms of P0733 2018 GMC Sierra
- Harsh shifting
- Delayed or erratic shifting
- Slipping gears
- Decreased fuel efficiency
- Transmission overheating
How to Fix P0733 2018 GMC Sierra
- Check and top off transmission fluid levels
- Inspect and replace any faulty transmission solenoids
- Test and potentially replace the TCM
- Inspect and replace worn-out clutch packs
- Perform a thorough inspection of internal transmission components and repair or replace as needed
Cost to Fix P0733 2018 GMC Sierra
The cost of repairing a transmission 3rd gear ratio incorrect issue can vary depending on the specific cause and the extent of the damage. On average, the repair costs for this type of transmission issue can range from $500 to $1500, including parts and labor. However, it's important to note that labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Additionally, the cost of parts and the complexity of the repair can also impact the overall repair cost. It's recommended to consult with a professional mechanic for a more accurate estimate based on the specific circumstances of the vehicle.
Tech Notes for P0733 2018 GMC Sierra
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Frequently Asked Questions about P0733 2018 GMC Sierra Code
1. What does OBDII code P0733 mean for a 2018 GMC Sierra?
The P0733 code indicates that the transmission is detecting an incorrect gear ratio in the third gear.
2. What are the common symptoms of OBDII code P0733 in a GMC Sierra?
Common symptoms include harsh shifting between gears, slipping transmission, decreased fuel efficiency, and illuminated Check Engine Light.
3. What are the possible causes of the P0733 code in a 2018 GMC Sierra?
Possible causes include low transmission fluid levels, dirty or contaminated transmission fluid, faulty shift solenoids, issues with the torque converter, or internal transmission damage.
4. How can I diagnose the P0733 code in my GMC Sierra?
Diagnosis typically involves scanning the vehicle's onboard computer to retrieve the trouble codes, checking the transmission fluid level and condition, inspecting for any leaks, and performing a thorough visual inspection of the transmission components.
5. Can I drive my GMC Sierra with the P0733 code?
It is not recommended to drive your vehicle with the P0733 code as it can lead to further damage to the transmission. Have the issue diagnosed and repaired as soon as possible.
6. How much does it cost to repair the P0733 code in a 2018 GMC Sierra?
The cost of repair can vary depending on the specific cause of the code. It can range from a simple fluid change or solenoid replacement to a more extensive transmission rebuild, costing anywhere from a few hundred to a few thousand dollars.
7. Are there any DIY tips for fixing the P0733 code in a GMC Sierra?
Some DIY tips include checking and topping up transmission fluid, inspecting for any visible leaks, ensuring proper connection of electrical components, and clearing the code to see if it returns after basic maintenance.
8. Can neglecting the P0733 code lead to more severe transmission issues?
Yes, ignoring the P0733 code can lead to further transmission damage, potentially resulting in complete transmission failure. It is crucial to address the issue promptly to prevent costly repairs.
9. Is it possible for a faulty sensor to trigger the P0733 code in a GMC Sierra?
Yes, a faulty sensor such as a speed sensor or transmission position sensor can sometimes cause the transmission to shift incorrectly, leading to the P0733 code. It is essential to have all sensors checked during diagnosis.
10. How long does it typically take to repair the P0733 code in a 2018 GMC Sierra?
The repair time can vary based on the exact cause of the code and the extent of the repairs needed. It can range from a few hours for minor fixes to several days for more complex transmission repairs.
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