exardus

hey guys. Yesterday two engine codes poped up on my max. One is a 0707 - which is a back O2 sensor, and a 0504 code which points to a fault in Automatic Transmission Communications line. I've also noticed that my car started to shake after 60mph. Could you give me any advice on how to deal with the 0504 code, is it a bad code to have or could it lead to breaking of the tranny and stuff like that? Thanks Alot!

Kevlo911

iTrader: (36)

0504
Diagnostic Trouble Code 0504 points to a problem with the Automatic Transmission Communications line. Pulse signals are exchanged between the Engine Control Module and the Transmission Control Module to assure smooth shifting during hard acceleration or deceleration.

This malfunction is detected when the ECM continuously receives an incorrect voltage from the TCM. Possible causes include...
- Harness or connectors (The communications line circuit between the ECM and the TCM is open or shorted.)
- TCM
- Discharged or faulty battery





0707
"0707" which points to the rear Oxygen Sensor.

Your Maxima has three Oxygen Sensors. Two are front sensors, mounted in
the Y-pipe between the exhaust manifolds and the Catalytic Converter. One
is a rear sensor, mounted in the exhaust pipe downstream of the Cat.

When both front Oxygen Sensors are operating normally the rear sensor serves only to keep tabs on the Catalytic Converter. That's the reason your engine is running well. The Engine Control Module (the computer) is not using the signal from the rear sensor to control engine management functions.

For more information about Oxygen Sensors go to
http://www.volksparts.com/o2sensors.htm

For specific information about replacing Oxygen Sensors on your Maxima see
the Chilton manual (page 4-13) or the Haynes manual (page 6-14).

In a different thread SprintMax said he got a great price on a replacement factory Oxygen Sensor from Vester Nissan. He didn't give a location or contact information. Perhaps he was referring to Vester Nissan of Clinton NC, 1-800-572-2005.

exardus

thanks but i read the faqs, i still can't understand what i should do about this code. Maybe someone can help me out? is it alright to drive my car at not very high speeds?

exardus

could someone provide me with any more info on the TCM code. I think that the shaking is due to a bad oxygen sensor. Thank for the help.