P1737 – OBD-II DTC

OBD-II DTC P1737 – 2-3 Shift Malfunction

DTC P1737 meaning

DTC P1737 refers to a malfunction in the automatic transmission, specifically indicating a problem with the 2-3 shift. This code is generated when the Engine Control Module (ECM) detects that the transmission is not shifting from second gear to third gear as expected. This can be due to various issues within the transmission system or related components.

DTC P1737 symptoms

Common symptoms associated with DTC P1737 may include:

• Delayed or harsh shifting between gears
• Transmission slipping or failing to engage
• Check Engine Light illuminated
• Unusual noises during shifting
• Reduced acceleration or power

DTC P1737 causes

Several factors can lead to the triggering of DTC P1737, including:

• Faulty transmission control module (TCM)
• Worn or damaged transmission components
• Low transmission fluid levels or contamination
• Faulty shift solenoids
• Electrical issues such as wiring problems or poor connections

DTC P1737 seriousness

DTC P1737 can be considered a serious issue as it directly affects the vehicle’s transmission performance. If left unaddressed, it may lead to further transmission damage, reduced drivability, and potential safety hazards. It is advisable to diagnose and repair the issue promptly to avoid more extensive repairs and ensure safe vehicle operation.

How to diagnose DTC P1737

To diagnose DTC P1737, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1737 code.
2. Check for any additional DTCs that may provide more context.
3. Inspect the transmission fluid level and condition.
4. Examine the wiring and connectors related to the transmission control module and shift solenoids.
5. Test the shift solenoids for proper operation.
6. Perform a road test to observe shifting behavior and identify any irregularities.

How to fix DTC P1737 step-by-step instructions

To fix DTC P1737, follow these steps:

1. Check and top off the transmission fluid if low or contaminated.
2. Inspect and repair any damaged wiring or connectors related to the transmission.
3. Test and replace faulty shift solenoids if necessary.
4. Replace the transmission control module if it is determined to be faulty.
5. Clear the DTC using an OBD-II scanner and perform a road test to ensure the issue is resolved.

How to erase DTC P1737

To erase DTC P1737, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn the ignition key to the “On” position without starting the engine.
3. Access the scanner’s menu and select the option to clear or erase DTCs.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to check if the code reappears.

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