p1738 problem in 2nd clutch pressure switch circuit
P1738 Problem in 2nd Clutch Pressure Switch Circuit
- OBD-II Code P1738: This code indicates a problem with the 2nd clutch pressure switch circuit, which is responsible for monitoring the hydraulic pressure of the second clutch in an automatic transmission.
P1738 – Problem in 2nd Clutch Pressure Switch Circuit
– P1738 OBD-II Trouble Code: Problem in 2nd Clutch Pressure Switch Circuit (Severity: Moderate)
Common Causes
P1738 – Problem in 2nd Clutch Pressure Switch Circuit
OBD-II Trouble Code Description: The P1738 code is set when the transmission control module (TCM) detects an electrical problem with the 2nd clutch pressure switch circuit.
Common Causes of P1738:
- Faulty 2nd clutch pressure switch
- Open or short in the wiring harness connected to the 2nd clutch pressure switch
- Low transmission fluid level or dirty transmission fluid
- Internal transmission issues
Common Misdiagnosis
OBD2 Code: P1738
Description: 2nd Clutch Pressure Switch Circuit
Common Misdiagnosis: Replacing the transmission control module (TCM) without checking for wiring issues or faulty pressure switches.
Common Diagnostic Steps
OBD2 Code: P1738
Description: 2nd Clutch Pressure Switch Circuit
- Check the transmission fluid level and condition. Low or dirty fluid can affect pressure switch operation.
- Inspect the wiring and connectors for damage, corrosion, or loose connections in the 2nd clutch pressure switch circuit.
- Test the 2nd clutch pressure switch using a multimeter to ensure it is functioning correctly.
- Verify that the powertrain control module (PCM) is receiving the correct signal from the pressure switch.
- If applicable, check for any related service bulletins or recalls that may address known issues with this component.
- Replace the 2nd clutch pressure switch if it is found to be faulty after testing.
- If all else fails, consider consulting a professional technician for further diagnosis and repair.