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GTECH Calibration
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P1899

Park Neutral Position Switch Stuck In Park Or In Gear.

  • Chrysler
  • Powertrain
  • Manufacturer code
  • Medium severity

How this code is built

P
SystemPowertrain
1
Defined byThe manufacturer
8
AreaTransmission
99
FaultThe specific fault in that area

What it means

P1899 on a Chrysler means the powertrain control module has decided the park/neutral position switch signal does not match how the vehicle is behaving. The switch reports park or neutral while the vehicle is moving under load, or reports in gear when it should not. The module sees an implausible combination of switch state, engine speed and vehicle speed.

Symptoms

  • Malfunction indicator lamp on
  • Engine will not crank, or cranks in gear but not in park or neutral
  • Engine starts in gear or cranks in the wrong selector position
  • Erratic or unstable idle when selecting drive or reverse
  • Harsh, delayed or incorrect gear engagement
  • Reverse lamps not working or working in the wrong position

Possible causes

  • Park/neutral position switch (transmission range sensor) worn, faulty or out of adjustmentlikely
  • Gear selector linkage or cable out of adjustment so the selector position does not match the transmissionlikely
  • Wiring damage, corrosion or poor connection at the switch connector or in the switch circuitpossible
  • Water or contamination in the switch connector or transmission harnesspossible
  • Vehicle speed or engine speed signal fault causing a false plausibility failurepossible
  • Faulty powertrain control module or transmission control modulerare

How to diagnose

  1. Read all stored and pending codes and the freeze frame data, noting vehicle speed, engine speed and selector position when the fault set. Check for related vehicle speed or transmission codes.
  2. Check the selector lever position matches the display and that the transmission lever feels positively located in each gear.
  3. Inspect the switch, connector and harness for damage, corrosion, moisture or fluid contamination.
  4. With a scan tool, watch the park/neutral switch state while moving the selector through every position and compare it with the actual gear. Look for dropouts or wrong states.
  5. Check the selector cable or linkage adjustment and condition against the manufacturer's specification for the model.
  6. Test the switch circuit for continuity, short circuits and correct reference and return signals using the wiring diagram for the specific model and transmission.
  7. Check the vehicle speed and engine speed signals are plausible, as the fault logic depends on them.
  8. Only after the above, consider the control module, following the manufacturer's test procedure.

How to fix

  • Adjust the selector cable or linkage to specification
  • Replace the park/neutral position switch and set it up per the manufacturer's procedure
  • Repair or replace damaged wiring and clean or replace corroded connector terminals
  • Fix any water or fluid ingress and replace affected connectors
  • Repair any vehicle speed or engine speed signal fault found
  • Replace or reprogram the control module only if testing confirms it is faulty and a repair procedure calls for it

Can I keep driving?

Medium severity

The car can usually be driven for a short time, but starting problems and poor gear engagement may get worse or leave you stranded. Have it checked soon, and avoid driving if it starts in gear or the gear selection is unreliable.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.

This code for other makes

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