OBD code P1734 indicates a problem with the Speed Sensor in the Automatic Transmission Control Module.
Symptoms include the Engine Light being ON.
This issue is commonly caused by a faulty Speed Sensor, open/shorted harness, or poor electrical connection.
It’s crucial to inspect the wiring and connectors for damage.
A possible fix is to address the issues with the Speed Sensor circuit and connections.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
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Symptoms of the p1734 OBD Code
The vehicle may experience harsh shifting or slipping in the transmission with fault code P1734.
- Symptoms: Engine Light ON.
- Possible harsh shifting from the transmission.
- Difficulty shifting gears.
- Rough or jerky acceleration.
Causes of the p1734 OBD Code
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P1734 code typically indicates a problem with the hydraulic pressure sensor circuit in the transmission.
- P1734 can be caused by a Faulty Speed Sensor.
- A Speed Sensor harness that is open or shorted.
- A Speed Sensor circuit with poor electrical connection.
Fixing Error Code p1734 Step By Step
Address the issue by inspecting the transmission control module and related wiring for faults.
- To fix OBDII code P1734, first, review the ‘Possible Causes’ mentioned above and visually examine the corresponding wiring harness and connectors.
- Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Next, check the transmission fluid level and condition to ensure it is at the correct level and not burnt.
- Perform a thorough inspection of the transmission solenoids and wiring for any issues.
- Test the transmission control module (TCM) for proper operation and consider reprogramming or replacing it if necessary.
- Finally, clear the fault codes and test drive the vehicle to verify that the issue has been resolved.
Cost Of Fixing p1734 Fault Code
Diagnosing and repairing fault code P1734 typically involves inspecting and servicing the transmission components.
The cost to diagnose and fix OBD code P1734 typically ranges from $75 to $150, with an estimated repair time of 1. 0 hour.
Costs depend on labor rates, shop fees, and the complexity of the transmission issue causing the code.
Details of the p1734 OBD Code
P1734 code relates to an issue with the 4th gear ratio in the transmission.
OBD code P1734 means a problem with the 4th gear ratio in an automatic transmission.
This code is triggered by the Transmission Control Module (TCM) when it detects that the actual gear ratio does not match the desired gear ratio for 4th gear.
This discrepancy can be caused by issues such as a faulty transmission solenoid, a slipping clutch, or internal transmission damage.
The TCM monitors input speed sensor signals and output speed sensor signals to determine the gear ratio, and when it detects a discrepancy, it sets code P1734.
Mechanic’s Tech Notes
P1734 code indicates a problem with the 4th gear pressure switch circuit in the transmission.
To diagnose and fix OBDII code P1734, start by checking the Transmission Control Module (TCM) power and ground using a multimeter.
Verify TCM communication over the Controller Area Network (CAN) using a scan tool.
If the TCM does not respond, reprogramming or reflashing may be necessary.
Visually inspect the wiring harness and connectors for any damage, and ensure connector pins are not broken, bent, pushed out, or corroded.
Address any issues found during the inspection to resolve the P1734 fault code.
FAQ
OBD code P1734 indicates a faulty Speed Sensor. Check sensor, harness, and connections for issues. Inspect wiring for damage or corrosion.
Common symptoms of OBD code P1734 include Engine Light ON, caused by a faulty Speed Sensor, open/shorted harness, or poor electrical connection. Inspect and repair affected components.
Diagnose and repair OBD code P1734 by checking the speed sensor, harness, and circuit for faults. Inspect wiring, connectors, and components for damage or corrosion.
Wrap Up
If your transmission is slipping or shifting erratically and you see OBDII code P1734, it may be caused by a malfunctioning pressure control solenoid, low transmission fluid level, or a faulty transmission control module.
To address OBDII code P1734, check the transmission fluid level and condition, inspect the wiring harness and connectors for any damage, and test the pressure control solenoid for proper operation.
Consider replacing the pressure control solenoid if necessary.
