DTC P0733 Gear 3 Incorrect ratio

In the intricate landscape of your vehicle’s transmission system, the Diagnostic Trouble Code (DTC) P0733 emerges as a pivotal indicator. Today, we embark on a journey to uncover the meaning, causes, symptoms, diagnostic methods, and effective solutions associated with the issue of an incorrect gear ratio within Gear 3.

1. What does P0733 code mean?

The P0733 code specifically signifies an incorrect gear ratio within Gear 3, as detected by the Transmission Control Module (TCM). It indicates a disparity between the anticipated gear ratio by the TCM and the actual gear ratio within Gear 3.

2. What are the causes of DTC P0733?

The activation of the P0733 code related to Gear 3 can stem from various origins, including:

  • Low or Contaminated Transmission Fluid: Insufficient or contaminated transmission fluid can hinder proper gear engagement in Gear 3.
  • Malfunctioning Shift Solenoids: Faulty shift solenoids can disrupt the gear-shifting process specific to Gear 3.
  • Clutch Problems: Issues within the clutch assembly, such as wear or damage, can impede proper gear engagement in Gear 3.
  • Transmission Control Module (TCM) Issues: A malfunctioning TCM might misinterpret gear engagement signals within Gear 3.
  • Internal Mechanical Faults: Mechanical irregularities within the transmission system affecting Gear 3 operation.

3. What are the symptoms of DTC P0733?

When the P0733 code surfaces for Gear 3, you might observe various symptoms, including:

  • Check Engine Light Activation: The illumination of the check engine light serving as an indicator of the issue within Gear 3.
  • Difficulty Shifting into Gear 3: Challenges experienced while engaging or shifting into Gear 3.
  • Transmission Slipping or Jerking: Unusual or erratic behavior during acceleration or deceleration when operating in Gear 3.

4. How to diagnose DTC P0733?

For a precise diagnosis related to Gear 3:

  • Perform OBD-II Scan: Utilize a diagnostic scanner to retrieve the P0733 code and any accompanying codes for comprehensive insights.
  • Transmission Fluid Inspection: Examine the quality and quantity of transmission fluid specifically related to Gear 3.
  • Assess Shift Solenoids and Clutch Assembly: Inspect shift solenoids and the clutch components for proper functioning within Gear 3.
  • Evaluate TCM Signals: Analyze the signals sent and received by the TCM specifically regarding Gear 3 engagement.

5. How to fix DTC P0733 problem?

Rectifying the P0733 code linked to Gear 3 involves:

  • Transmission Fluid Maintenance: Ensure transmission fluid levels and quality meet manufacturer specifications for Gear 3 operation.
  • Repair or Replace Components: Address issues with shift solenoids, clutch components, or TCM related to Gear 3 engagement.
  • Clear the DTC: Utilize a diagnostic scanner to clear the trouble code post-resolution of the root issue within Gear 3.


The P0733 code indicating an incorrect gear ratio within Gear 3 demands immediate attention to uphold the functionality of your vehicle’s transmission. Understanding its causes, symptoms, diagnostic procedures, and effective solutions empowers you to efficiently address this issue, restoring optimal performance and smooth gear engagement within Gear 3.

While this guide offers valuable insights, seeking assistance from certified auto technicians is advisable for accurate diagnosis and resolution of DTC issues related to an incorrect gear ratio within Gear 3. Stay informed, but rely on expert guidance when necessary to ensure your vehicle operates at its best.