The transmission control module (TCM) takes inputs from numerous sensors. It then uses this information to control various transmission related outputs such as shift solenoids and the torque converter clutch. The TCM will go into limp mode when it loses...
Hi there. The reduced engine power message could mean that something went wrong with the engine or transmission. There are multiple sensors and systems in the vehicle to cause this message to appear. Hook up a scanner to the computer...
Hi. Most of the time when these codes come up it is because the throttle body has failed. If you replaced the throttle body and cleared the codes and the problem persists then there may be another issue. When replacing...
If you do not use the recommended fluid for Chrysler or any transmissions in general, it can cause the transmission to have shifting and slipping concerns. Even damage can be caused from incorrect fluids being used. This is why I...
Your problem may be something simple or more complex. The first thing that needs to happen is for the Diagnostic Trouble Codes or DTC's to be read and addressed. There are only a few things that can put your car...
Hello, thank you for writing in. The vehicle goes into "limp mode", or your model's version of, when it is at risk of becoming damaged. This is a good thing, and it will protect your engine from having worse issues...
Hello, thank you for writing in. The warning lights and loss of power that you are having are typically triggered by a major malfunction. The braking and unresponsive throttle are both safety features to keep the vehicle from putting you...
Hello - your Mercedes transmission is in "limp mode (https://www.yourmechanic.com/question/car-stuck-in-limp-mode)". Something has failed in the transmission, and it has engaged 2nd gear as a limited means of getting you to a repair shop. If you could forward the specific codes...
Hello - this is a challenge, since you have multiple serious problems. The P1259 problem is most likely what is putting your engine into "limp mode". P1259 (https://www.yourmechanic.com/question/got-code-p1259-after-check-engine-light) in a Honda is a problem with the variable valve timing mechanism...
Hello, thank you for writing in. Everything you have done so far will only improve the performance once this issue is resolved, so do not loose hope yet. The only system it would appear you have not looked into would...
Based on the service information I have, it seems like the most likely cause is an internal failure of your powertrain control module. Your headlights getting brighter when the engine revs higher indicates a charging system problem. The problem is...
Hi there. Check the fuel pressure regulator (https://www.yourmechanic.com/services/fuel-pressure-regulator-replacement) and make sure that its working and plugged in. Put a fuel pressure tester on the fuel rail and make sure that there is good fuel pressure of 45 to 65 psi....
Hello, thank you for writing in. The Limp Mode is activated as a safety precaution due to the computer detecting an issue that will potentially cause further damage. There are a wide variety of sensors that are inputs for the...
Vehicles go into limp mode when the computer detects a possibility of damaging other components if you continue to drive it in the current state. Because of all the variables that go into diagnosing a drivability issue and given the...
Hello, thank you for writing in. The vehicle is having issues with its electronic throttle. There have been many cases of bad motors that control the opening and closing of the throttle based on the sensors that detect movement in...
Check for any OBD-II stored trouble codes that might provide clues. If you carried over your sensors, such as the transmission speed sensor, and other controls to the replacement transmission, I would first look for a fault with those external...
The code P0420 (https://www.yourmechanic.com/article/p0420-obd-ii-trouble-code-catalyst-system-efficiency-below-threshold-bank-1-by-jamahl-walker) will cause the computer to put the transmission in limp mode to protect the catalytic converter. Check the following areas to see the cause for the P0420 code condition: P0420 A damaged or failed oxygen sensor...
When the vehicle goes into limp mode when the engine misfires, the computer is shutting down the electronics to the transmission to prevent damage to the catalytic converter as the fuel condition is either too lean or too rich. Check...
Hello. On your vehicle there is no limp mode trigger that is used for diagnostics. On some newer vehicles this is something that is part of the diagnostic process but not on a 2002. The only way to fully read...
There are small bus computers in your vehicle that control multiple items throughout the car. There is a bus controller in each door on the car. It is possible that the door that is leaking water inside it is causing...
