Wednesday, November 30, 2011

1999 nissan maxima problems.....?

1999 nissan maxima problems.....?


I'm having issues with my 4th generation nissan maxima... Ok i changed my spark plugs ,air filter,pvc valve, also I put sea foam in through the vacuum line , oil crank, and gas tank... Changed my oil also hoping this will clear my service engine soon amber light.. after all this I go to auto zone parts store asked a manager to scan for this issue...the guy gives me 4 codes with possible or accurate issues... Code P0138 (O2 Oxygen Sensor Circuit High Voltage (Bank1, Sensor2)...CODE P0400 - Exhaust Gas Recirculation Flow Malfunction.....CODE P0325 -Knock Sensor Circuit Malfunction.........CODE P0139-Oxygen Sensor Circuit Slow Response (Bank1, Sensor2).... OK HE ALSO TELL ME TO CHECK THIS OUT WITH A SHOP FOR VERIFICATION... Im not sure about the accuracy of the scanner... All i know that the car does shakes at high speeds up between 65-80 mph.... At a stop while the car is still in drive it atttemps to jerk a bit while still holding the brakes ... This is about it.. may some can can give me some insight about these issues.. thanks in advance.. i truly beleive that no answer is a wrong answer otherwise i wouldnot ask for help if i already knew how to solve the problem..|||Sounds like seafoam may or may not have affected the old worn out O2 sensors. How many miles? Don't worry about the Knock sensor P0325 that will not light the SES light. Your biggest problem is P0400 EGR flow malfunction. carbon clogged egr passage way "guide tube" at the back of the intake manifold. About 3.5 hour job at your Nissan dealer. Monotoring the o2 sensors will confirm the sensors are not functioning properly. My suggestion fix the carbon clogged passage way first clear all the codes and wait and see what codes come back. Ocasional misfire could be a coil breaking down or cracked spark plug insulator but your car does not have a ING%26gt;Primary code or a specific P0300 to P0306 code. Not preforming the correct repair will ruin your cat converters and that really gets expensive.

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