Q: I have a 2007 dodge charger v6 3.5L engine NAG1 RWD Transmission. I'm confused in what is causing limp mode in my car..when the c

asked by on

I have a 2007 dodge charger v6 3.5L engine NAG1 RWD Transmission...I'm confused in what is causing limp mode in my car..when the codes are cleared initially I can drive a day or two then the first and only code I'm getting is p0420 bank 1 cat efficiency below threshold..It doesnt go in limp mode still and I can drive another day or two..Eventually it goes in limp mode and then I receive the codes p2767 and p2784..input speed sensor codes..The transmission shop recommends changing the conductor plate..I've already replaced the catalytic converter on my driver side and bank 1 o2sensors but I'm still getting the po420 code for bank1.I'm trying to find out if the po420 code could be causing limp mode or if it's just the p2767/p2784 codes.The trans shop is saying the p0420 code has nothing to do with the limp mode, the limp mode prob can only be diagnosed after it goes in limp mode and that's y I'm only getting the sensor codes after and not before.Don't wanna get a new plate and still limp

My car has 119505 miles.
My car has an automatic transmission.

The code P0420 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
  • The oxygen sensor wiring damaged or connected improperly
  • The engine coolant temperature sensor is not working properly
  • A leaking exhaust manifold or a leak in the exhaust system
  • The spark timing is retarded
  • There is a leaking fuel injector or there is high fuel pressure
  • The engine has a cylinder misfire
  • The engine oil is contaminated

For the codes P2767 and P2784 are related to the input speed on the torque converter. The transmission will default to a limp mode if the torque converter is causing the input shaft to have a loss of speed. If you need further assistance with your check engine light, then seek out a professional, such as one from Your Mechanic, to help you.

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. I have a 2007 dodge charger v6 3.5L engine NAG1 RWD Transmission. I'm confused in what is causing limp mode in my car..when the c

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: Shutoff during start, Check Engine Light on, power loss - 1990 Mazda B2200

First thing is to check to see what problem codes are setting off the Check Engine Light. The compression numbers you mention are also pretty low, indicating worn piston rings, or burned valves. If you would like, a certified technician...

Q: Noise in shifter

Hello there, a few different faults will cause a shifter noise in your 2013 Dodge Charger. If the ABS light came on at the same time and it is linked to a speed sensor than this may be linked to...

Q: Acceleration inoperative gas pedal - 1992 Plymouth Acclaim

Hi there, thank you for your question. There is a mechanical link between the throttle pedal and the throttle body on the engine, usually called the throttle cable. Check this part to see if it broken or has stretched over...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...