OBD code P0949 indicates a problem with the Auto Shift Manual Switch Circuit Low.
This affects the transmission system.
Symptoms include the Engine Light being ON.
The issue is typically caused by a faulty Auto Shift Manual Switch or related wiring issues.
While it may not cause immediate drivability issues, it should be addressed promptly to prevent further complications.
To fix it, inspect the wiring harness and connectors for any damage or poor connections, focusing on the Auto Shift Manual Switch circuit.
| 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 p0949 OBD Code
The vehicle may experience issues related to the transmission control module communication circuit malfunction (P0949).
- Symptoms: Engine Light ON.
- Possible harsh shifting from the transmission.
- Difficulty shifting gears.
- Transmission may go into limp mode.
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Causes of the p0949 OBD Code
Possible triggers for fault code P0949 include issues with the transmission fluid pressure sensor circuit.
- P0949 can be caused by a faulty Auto Shift Manual Switch.
- An open or shorted Auto Shift Manual Switch harness.
- A poor electrical connection in the Auto Shift Manual Switch circuit.
Fixing Error Code p0949 Step By Step
Replace the transmission fluid pressure sensor 2 circuit low with a new sensor.
- To fix OBDII code P0949, first, review the possible causes related to the transmission fluid pressure sensor switch circuit low.
- Visually inspect the wiring harness and connectors associated with the transmission fluid pressure sensor switch.
- Check for any damaged components and ensure the connector pins are not broken, bent, pushed out, or corroded.
- If no visible issues are found, test the transmission fluid pressure sensor switch using a multimeter to verify its functionality.
- Replace the transmission fluid pressure sensor switch if it fails the test.
- Clear the fault codes using an OBDII scanner and test drive the vehicle to ensure the issue has been resolved.
Cost Of Fixing p0949 Fault Code
Diagnosing and repairing fault code P0949 may involve inspecting and replacing the transmission fluid pressure sensor.
The cost to diagnose and fix OBD code P0949 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 repair needed.
Details of the p0949 OBD Code
P0949 code relates to an issue with the hydraulic pressure sensor circuit in the transmission.
OBD code P0949 means the transmission fluid pressure sensor switch B circuit low.
This code is triggered by the Engine Control Module (ECM) when it detects a low voltage signal from the transmission fluid pressure sensor switch B.
This sensor is typically located within the transmission valve body and monitors the fluid pressure to ensure proper operation of the transmission.
When the voltage signal falls below the specified threshold, the ECM sets code P0949 to indicate a potential issue with the transmission fluid pressure sensor switch B circuit.
Mechanic’s Tech Notes
This code indicates a problem with the Auto Shift Manual Control Circuit Low.
To diagnose and fix OBDII code P0949, start by checking the Transmission Control Module (TCM) power and ground using a multimeter.
Verify TCM communication over the Controller Area Network (CAN) network with 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 check connector pins for signs of being broken, bent, pushed out, or corroded.
Address any issues found during the inspection to resolve the P0949 code effectively.
FAQ
Common symptoms of OBD code P0949 include the Engine Light ON. The causes may be a faulty Auto Shift Manual Switch or related wiring issues.
OBD code P0949 typically appears due to a faulty Auto Shift Manual Switch, open/shorted harness, or poor electrical connection. Inspect and repair wiring/connectors as needed.
Diagnose and fix OBD code P0949 by checking the Auto Shift Manual Switch and its wiring for faults like open circuits or poor connections.
Wrap Up
If your transmission is slipping or shifting erratically and you see OBDII code P0949, it may be caused by a faulty transmission fluid pressure sensor switch B circuit.
This could be due to a sensor malfunction, wiring issue, or poor electrical connection.
To address OBDII code P0949, start by inspecting the wiring harness and connectors related to the transmission fluid pressure sensor switch B circuit.
Test the sensor for proper operation and replace if necessary.
Ensure all connections are secure and free of corrosion or damage.
