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P3840 Engine Trouble Code

When your car's ' P3840 Check Engine' light comes on, it's usually accompanied by a sinking feeling in the pit of your stomach. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap. But in many cases, it means at minimum that you'll be visiting the car dealer to locate the malfunction and get the light turned off.

P3840 Code Meaning :

P
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine
3
Ignition System Or Misfire
8
Engine Oil Temperature Sensor Malfunction
4
Cylinder 10 Contribution/balance Fault
0
Reverse Input Circuit
  Engine

When you check car engine light came on code P3840 the reason should be . However manufacturer may have a different definition for the P3840 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.

P3840 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P3840 engine trouble code is about Reverse Input Circuit.

Reason For P3840 Code

The reason of P3840 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

P3840 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.

P383F Previous Engine Trouble Code For Next Engine Trouble Code For P3841

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