Question about 2004 Nissan Quest
The check engine,tcs,and slip light came on. we took it to auto zone and it read bank 1 cam shaft sensor needed replaced, we replaced both cam shaft sensor and the crank shaft position sensor and still have the lights on and every now and then we have trouble starting it.... what else could be the problem?
Did you reset the light after change of sensers as some require reset to come out of limp mode
Posted on Dec 26, 2013
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Posted on Jan 02, 2017
TCS is Traction Control System,and all TCS's are controlled though the Anti Lock Braking (ABS) system.Here's how it works:Each wheel,or in some cases,only the drive wheels have a speed sensor mounted near the hub or axle,and sends a speed signal to the PCM (Powertrain Control Module).The PCM monitors wheel speed continuously,and if it sees a speed out of the ordinary,say for example the right rear tire is spinning and traveling at a much higher speed than the left rear,the PCM will pulse the brakes through the ABS system on the right rear to slow down the right rear so that the left and right wheel speeds match up,this is how the traction control works.So,if you have a TCS problem,the PCM will see this and set a Dignostic Trouble Code (DTC).You need to pull the DTC's out of the system with a scan tool,diagnose and repair the DTC's.It could likely be something as simple as a malfunctioning wheel speed sensor,but you won't know until the codes are pulled out,as this will point in the general direction.Good luck.
Posted on Aug 09, 2008
SOURCE: check engine light on
Diagnostic code produces P0420 catalyst system efficiency below threshold-Bank 1. Probable causes are listed as follows:
1-air leak in exhaust before rear 02 sensor, 3-Fuel system fault,
4-faulty catalytic converter.
Posted on May 31, 2010
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