Check Engine Light - 1995 Nissan Altima

the ecm (main computer) is behide a panel,by the gas pedal. to start the self diagnosis system inspection, with the ignition key ON . (engine not running). turn the mode selector clockwise and hold it there for two seconds then completely counterclockwise and observe the flashing light on the computer.carefully observe the flashes and record the exact number onto paper. for example, code 43 (throttle position sensor or tps circuit) is indicated by four long flashes on the red led followed by three quick flashes. then report back with the codes and i will let you know what they are ok.

thehawk93

but better hace-it read by mecanics they charge 15.00 you will have the exact code and they will be abble to remove the code because OBD2 code do not remove by disconnecting battery

how do you clear the codes after a tune-up?

hopmon wrote in news:zoKhf.11305$0h5.5335@dukeread10:

Most auto parts stores around here have scan tools and will bring them out to your car to read the codes when the check engine light is on. I imagine that if you ask nice enough, they will clear your codes and reset the check engine light too.

I was told by the Nissan service dept that the check engine light will go out by it'self (and codes will clear?) after 6 trips with no recorded problems.