P1810high severityPowertrain
TFP Valve Position Switch Circuit
on 2011 Chevrolet Express 6.0L V8 Vortec · RWD
What this code means
The PCM/TCM detected a fault in the Transmission Fluid Pressure (TFP) manual valve position switch circuit. This switch tells the TCM what gear range the driver has selected.
Symptoms
- Check Engine Light
- Transmission stuck in one gear
- Incorrect gear selection display
- Harsh shifting
- No reverse
Common causes
- Faulty TFP switch (internal to transmission)
- Wiring issue to TFP switch
- Transmission connector damage
- TCM failure
- Low transmission fluid affecting pressure switch
Diagnostic steps
- Check transmission fluid level and condition
- Read TFP switch data with scan tool
- Test TFP switch circuit resistance
- Inspect transmission connector
- Compare commanded gear to actual gear
Repair notes
Check fluid level first. TFP switch is internal to the transmission and requires pan removal to access. Replace switch or repair connector.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1