Fault Code P0840
Code meaning, symptoms, possible causes, part number, and estimated cost.
P0840
Transmission Fluid Pressure Sensor/Switch 'A' Circuit
Code P0840 indicates a malfunction in the electrical circuit of the 'A' transmission fluid pressure sensor/switch. This can lead to serious problems in the transmission's function.
Part Details
Part Name
Transmission Fluid Pressure Sensor/Switch
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪400 - ₪1500
Engine Location
Inside or on the transmission
Symptoms
- Harsh or erratic shifting
- Transmission slipping
- Transmission enters limp mode
- Check Engine Light on
Possible Causes
- 1Faulty transmission fluid pressure sensor/switch
- 2Damaged wiring, corrosion, or short circuit in the circuit
- 3Loose connections
- 4Malfunction in the Transmission Control Module (TCM)
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