Hyundai HCD C3870 Code:

OBD-II Diagnostic Chassis (C) Trouble Code

Trouble In Hyundai HCD C3870 Possible Cause

Common causes of Hyundai HCD C3870 is include shorted, open, corroded, or damaged wiring circuits or connectors, faulty shift solenoid/s, defective engine drivability sensors (especially the engine temperature sensor), dirty or contaminated transmission fluid that restricts flow, defective valve body, a faulty PCM. PCM failure is rare.

Common Symptoms For Hyundai HCD C3870

  1. Carefully observe the resistance level of the sensor (on the screen of the digital volt/ohmmeter) as the temperature is elevated to see if it decreases smoothly
  2. This signal is systematically forwarded to affected control modules that utilize the data to accomplish various other tasks
  3. Typical causes of low pump pressure include clogged hydraulic passages, a defective pump, faulty shift solenoids, or a faulty electronic pressure regulator
  4. As exhaust temperature decreases (with the engine off), circuit resistance increases and the feedback voltage signal to the PCM decreases

Similar Problems

Computer And Auxiliary Outputs
Cruise Control Servo Indicates Low
Transmission Engaged At High Throttle Angle

Hyundai HCD C3870 Troubleshooting

There will also be noise coming from the turning radiator fan and the belt that turn the fan blade. There are a multiple of other belt driven devices under the hood. An engine pulley is mounted to the engine of an automobile and drives all belts. Your car probably has a serpentine belt which is a continuous belt used to drive multiple peripheral devices. Hyundai HCD C3870 OBD2 may also be triggered by faults earlier down the line. For example, a dirty MAF sensor might be causing the car to overcompensate in its fuel-trim adjustments. As a result, oxygen sensors are likely to report fuel mixture problems.

How to turn off Hyundai HCD C3870 check engine light ?

There are two ways to turn off the check engine light:

A repair technician can do so once repairs have been made.
The OBD II can automatically turn it off when it fails to detect the problem after several diagnostic cycles.

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