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GTECH Calibration
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P1899

Park Neutral Position Switch Stuck In Park Or In Gear.

  • Dodge
  • 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

On Dodge vehicles P1899 means the powertrain control module has decided the park/neutral position signal does not agree with how the vehicle is behaving. It sees the switch stuck reading either Park/Neutral or In Gear when engine and vehicle speed or load data say the opposite. The switch may be at fault, but so may its wiring, its adjustment or the selector linkage.

Symptoms

  • Malfunction indicator lamp on
  • Engine will not start, or starts only in certain gear positions
  • Starter cranks in Drive or Reverse, or will not crank in Park or Neutral
  • Rough or unstable idle when selecting Drive or Reverse
  • Reversing lamps not working or working in the wrong position
  • Gear indicator on the dash not matching the lever position

Possible causes

  • Faulty or worn park/neutral position switch (also called the transmission range sensor)likely
  • Switch out of adjustment or selector cable/linkage misaligned so the switch does not match the lever positionlikely
  • Damaged, corroded or loose wiring or connector at the switchlikely
  • Open or short circuit in the switch signal wire to the control modulepossible
  • Worn or broken gear selector linkage or cable bushespossible
  • Internal transmission range selector fault, depending on the model and transmission fittedrare
  • Fault in the powertrain control modulerare

How to diagnose

  1. Read the stored and pending codes and note the freeze frame data, including gear selection, vehicle speed and engine speed when the code set
  2. Check for other transmission, starter or reversing lamp faults that point to the same circuit
  3. Inspect the switch, connector and wiring for damage, water ingress, corrosion and loose pins
  4. Check the selector lever, cable and linkage for wear, slack and correct alignment in each gear position
  5. Using live data, move the selector through Park, Reverse, Neutral and Drive and confirm the displayed position changes correctly with each one
  6. Check switch continuity and resistance in each lever position against the manufacturer specification for the model
  7. Check the signal wire for open circuit, short to earth or short to voltage, and check the switch supply and earth
  8. If all wiring and the switch pass, check the control module connections and consult model-specific information before suspecting the module

How to fix

  • Repair or replace damaged wiring or connectors, and clean up corrosion
  • Adjust the selector cable or switch to the manufacturer's procedure so it matches the lever position
  • Replace the park/neutral position switch if it fails the position or continuity tests
  • Replace worn linkage or cable parts
  • Replace or reprogram the control module only if testing confirms it is faulty, following the manufacturer's procedure

Can I keep driving?

Medium severity

The car may still be driven, but it could fail to start or the gear display and engine control could behave unpredictably, so have it fixed soon. If it starts in gear or you cannot be sure of the selected gear, do not drive it.

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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