Q: Got a check engine code of 1899

asked by on

I drive a 1999 Jeep Grand Cherokee Laredo 4.0 6 cylinder and I recently got a check engine light code reguarding the park/ neutral switch . Everything seems fine it turns right on .reverse lights come on, and it turns on in neutral as well.. the only thing that I do notice is that when I'm driving I can see that my rmps go up high too 3k rpm then it shifts over too 3rd gear . I recently replaced a output speed sensor .. what could it possibly be?

My car has 150000 miles.
My car has an automatic transmission.

Hello. The symptoms you describe can be caused by a few different things. If you are showing code P1899, for a park / neutral safety switch that is stuck in gear then it may be possible that the switch needs to be replaced. The neutral safety switch directly effects the transmission behavior and can cause issues with the transmission if it has problems. In more serious cases it can even prevent the vehicle from starting if it goes out or experiences an issue. Another thing I would check is the vehicle’s transmission fluid. If the fluid is dirty, contaminated, or low it can cause the transmission to experience issues. Automatic transmission operate using fluid pressure, and any compromise in the fluid can negatively affect the transmission. A few other possibilities are the shift solenoids and the throttle position sensor. The computer uses these components to engage the transmission gears and shift points, and issues with them can sometimes cause symptoms similar to those you are experiencing. I would recommend having a professional technician, such as one from YourMechanic, come to your location to diagnose the cause of the transmission issues.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Got a check engine code of 1899

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Lacks power on takeoff 1999 Dodge Ram 1500

Hello - the combination of a lack of power from a standing start, and a poor shifting complaint may indicate your transmission is in "limp mode". This would cause it to take off in 2nd or even 3rd gear -...

Q: First gear in my transmission has a bad problem

The manual transmission on your Jeep Wrangler has one of two problems. The shift boot may be getting in the way of the shifter, blocking it from going all the way into first. This could cause it to pop...

Q: Oil light comes on when braking

You should first check to make sure the oil level is full. If system is full of oil then you should have the oil pressure checked to see if it is in specifications. The problem sounds like when you are...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.