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C3985 Engine Trouble Code

Meaning of C3985 engine trouble code is a kind of chassis trouble code and C3985 if your catalytic convertor fails completely, you eventually won't be able to keep the car running. Your gas mileage will also be terrible, so you should try and fix it as soon as you can. Unfortunately, the average replacement cost is around $2,000 and you can't do it yourself unless you're an experienced mechanic.

C3985 Fault Symptoms :

  1. Check engine light comes on
  2. Engine stalling or misfiring
  3. Engine performance issues
  4. Car not starting
If one of these reasons for C3985 code is occuring now you should check C3985 repair processes.
Now don't ask yourself; What should you do with C3985 code ?
The solution is here :

C3985 Possible Solution:

C3985 Engine

Gasoline engines use spark plugs to cause an explosion of fuel within the cylinder. In a properly timed engine, this explosion occurs at the proper moment to send the piston to the bottom of the cylinder and provide power to the drive shaft. If the plug wires are out of sequence, the explosion occurs at the wrong time. The improper timing of the explosion sometimes pushes the cylinder the wrong direction or interferes with the turning of the crank. As a result, the engine stutters or backfires, if it runs at all.

C3985 Code Meaning :

C 3 9 8 5
OBD-II Diagnostic Chassis (C) Trouble Code For Engine Ignition System Or Misfire Injector Circuit Malfunction - Cylinders Ignition/Distributor Engine Speed Input Circuit Malfunction Crankshaft Position Sensor B Circuit Malfunction

The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate.

C3985 OBD-II Diagnostic Chassis (C) Trouble Code Description

C3985 engine trouble code is about Crankshaft Position Sensor B Circuit Malfunction.

Main reason For C3985 Code

The reason of C3985 OBD-II Engine Trouble Code is Injector Circuit Malfunction - Cylinders.

C3985 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.