P0853: Drive Switch Input Circuit OBD-II Trouble Code

On four-wheel-drive vehicles that are equipped with an automatic transmission, the drive switch tells the ECU what gear the transfer case has been shifted into. This information is necessary to calculate the correct shift timing and engine setup. If an incorrect voltage signal is being sent from the transmission drive switch input circuit, a P0853 DTC will be stored.

Need a replacement transmission? Get an estimate for replacement transmissions and local installation. Look up your transmission model by vehicle make and model.

What Transmission Do I Have?

How Serious is the Code?

Because the vehicle’s computer needs to know what the transfer case is doing, a P0853 diagnostic trouble code is very serious and can impact the drivability of the vehicle.

Symptoms

Symptoms of a P0853 include:

  • Four-wheel-drive system refuses to engage
  • Transmission shifts harshly
  • Transmission will not shift

Causes

  • Damage to the wiring and/or connectors
  • Failed drive switch
  • Failed transfer case range sensor

How to Diagnose the Code?

The first step to diagnosing a P0853 OBDII trouble code, is to check the condition of the wiring and connectors. If no problems are found, the voltage output and grounding of the driver switch itself will need to be checked. Should no issues be found, transfer case range sensor will need to be tested and possibly adjusted.

Need a replacement transmission? Get an estimate for replacement transmissions and local installation. Look up your transmission model by vehicle make and model.

What Transmission Do I Have?

What Repairs Will Fix P0853?

  • Repair or replace damaged wiring and connectors
  • Replace drive switch
  • Adjust transfer case range sensor
  • Replace transfer case range sensor

Related Codes

  • P0850 – Park/Neutral Switch Input Circuit
    P0851 – Park/Neutral Switch Input Circuit Low
    P0852 – Park/Neutral Switch Input Circuit High
    P0854 – Drive Switch Input Circuit Low