If you see a TFP manual valve position switch DTC, it means that the transmission control module cannot determine the correct line pressure, which could impact the shift quality and torque converter operation.
How Serious is the Code?
If the transmission is operating with the line pressure too high, it will not only make the vehicle difficult to drive, it could seriously damage the internal transmission parts.
Symptoms of a P1810 DTC include:
- Unusually harsh shifts
- Check engine light
- Limp Mode
- Failed transmission fluid pressure manual valve position switch/TFP switch
- Short in the TFP valve position switch wiring harness
- Poor connection in the TFP valve positions switch circuit
How to Diagnose the Code?
In order to diagnose a P1810 DTC, a number of electrical tests will need to be performed to determine if the TCM is detecting the correct gear.
What Repairs Will Fix P1810?
- Repair any electrical shorts in the transmission fluid pressure manual valve position sensor circuit
- Replace the TFP sensor
P1816 – Transmission Fluid Pressure Valve Position Switch indicates Park/Neutral with Drive ratio
P1818 – Transmission Fluid Pressure Valve Position Switch indicates Drive without Drive ratio