P1743 – OBD-II DTC

OBD-II DTC P1743 – Shift Time Error

DTC P1743 meaning

DTC P1743 refers to a “Shift Time Error” in the vehicle’s transmission system. This code indicates that the transmission control module (TCM) has detected a discrepancy in the expected shift timing of the automatic transmission. The TCM monitors the time it takes for the transmission to shift gears and compares it to predetermined values. If the actual shift time exceeds these values, the code is triggered.

DTC P1743 symptoms

Common symptoms associated with DTC P1743 may include:

• Delayed or harsh shifting between gears
• Slipping transmission
• Unusual noises during shifting
• Check Engine Light illuminated
• Reduced fuel efficiency

DTC P1743 causes

Several factors can lead to the triggering of DTC P1743, including:

• Low transmission fluid levels
• Contaminated or degraded transmission fluid
• Faulty transmission solenoids
• Worn or damaged transmission components
• Issues with the TCM or its programming
• Electrical problems, such as short circuits or poor connections

DTC P1743 seriousness

DTC P1743 is considered a moderate to serious issue. If left unaddressed, it can lead to further transmission damage, resulting in costly repairs. Additionally, the symptoms may affect the vehicle’s drivability and safety. It is advisable to diagnose and resolve the issue promptly to prevent more severe complications.

How to diagnose DTC P1743

To diagnose DTC P1743, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1743 code.
2. Check for any additional DTCs that may provide more context.
3. Inspect the transmission fluid level and condition.
4. Examine the transmission wiring and connectors for damage or corrosion.
5. Test the transmission solenoids for proper operation.
6. Perform a road test to observe shifting behavior and note any irregularities.

How to fix DTC P1743 step-by-step instructions

To fix DTC P1743, follow these steps:

1. Check and top off the transmission fluid if low.
2. Replace the transmission fluid if it is contaminated or burnt.
3. Inspect and replace any faulty transmission solenoids.
4. Repair or replace damaged wiring and connectors related to the transmission.
5. Reprogram or replace the TCM if necessary.
6. Clear the DTC and perform a road test to ensure the issue is resolved.

How to erase DTC P1743

To erase DTC P1743, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the codes.
5. Disconnect the scanner and start the vehicle.
6. Monitor for any reoccurrence of the P1743 code during subsequent driving.