Need to know location of my ECM on a 2004 Nissan Altima 2.5 S 4L

SOURCE: 2003 Nissan Altima?

Where is the sensor placed on the car?

SOURCE: Location of oil filter on Nissan Altima 2005

The oil filter is located behind the right (passenger) inner fender cover. It is right next to the crankshaft pulley at the bottom of the front of the engine facing toward the right front wheel. I do not have a picture at this time.

Hope this is helpful!


Nissan Scope Technician- 10+ years experience in Nissan dealership.

SOURCE: Front struts replacement

Jack up and secure front end of your vehicle,Take off two front wheels. Loosen to bolt on the bottom of struts (Its a bolt and nut). Remove clip that holds brake hose on to strut and remove hose. DO NOT OPEN BRAKE LINE OR DISCONNECT FROM CALIPER. Remove bolts and remove bottom of strut from knuckle/Hub assembly. Then loosen nuts on strut tower( on top of fender inside hood) (3) nuts, mark exact locations of each nut on strut mount area on upper fender weld. Make sure to hold strut on the bottom so it doesn't drop down on caliper and knuckle or on you possibly.YOU WILL NEED A SPRING COMPRESSOR to compress spring so you can take struts off. MAKE SURE THAT SPRING IN COMPRESSED/SQUEEZED WITH A STRUT COMPRESSOR. Then loose center nut on strut tower(may be covered with a circular rubber cover) If nut spin around with out getting loose use vise grips to hold strut rod ONLY TO REMOVE STRUT NOT TO INSTALL. if you use vise grips to install it will damage strut. When nut is off, remove strut and reinstall new one transfer all rubber boots and cushions from old strut. Good Luck thanks for using FIX-YA.com contact me if you need more help.

SOURCE: Headlight Aiming/Adjustment

On the sides of the Radiator cross member. Look straight down. Should be a silver colored phillips head screw

SOURCE: high idle stalls at lights code for crank sensor

Crankshaft and Camshaft Position Sensors Camshaft Position Sensor Engine timing is determined from the relationship between the crankshaft and camshaft. This relationship is maintained by a timing chain or timing belt. The Engine Management System does not control engine timing but it does monitor the relative position and speed of these shafts by monitoring signals generated by sensors. The Engine Management System (EMS) uses signals generated by the camshaft position sensor to synchronize fuel injection to the valve sequence and for the on-board diagnostic procedure for misfire detection. The EMS energizes the injector at or near the time the intake valve opens. For misfire diagnosis, the EMS compares the number of camshaft sensor reference pulses and the number of crankshaft position sensor reference pulses received. If the EMS receives an incorrect number of pulses Diagnostic Trouble Codes (DTC’s) should be stored in the EMS.
If the camshaft position sensor or circuit is faulty most engines will start. Some engine management systems will then default to a pre-programmed injector firing sequence. All injectors may be energized simultaneously or all of the injectors on one bank may be energized at the same time. If the CMP data is required for misfire detection and reliable CMP data is not present misfire detection would probably be suspended.
Related Symptoms The following symptoms can be caused by an intermittent wiring connection or faulty signal to the EMS:

• Extended crank time with a cold engine
• Intermittent rough running
• Unstable idle
• Bucking
• Hesitation
• Stumble
• Chuggle
• Poor fuel economy
• Stalling on acceleration

Crankshaft Position Sensor Engine speed is a very important input to the Engine Management System (EMS). Crankshaft speed and position are the basis for many calculations made by the computer. Crankshaft position values are transmitted to the computer by pickup coils also known as Permanent Magnet (P/M) generators, hall-effect sensors or optical sensors. The Crankshaft Position Sensor (CKP) also known as engine speed sensor is located in close proximity to the crankshaft.
In addition the EMS uses minute variations in the CKP sensor data to determine engine misfire. The EMS uses this information in conjunction with the camshaft position sensor to perform misfire diagnostics.
Related Symptoms: No Start/Intermittent Start Condition – Can be caused by a faulty crankshaft position sensor due to loose connections, bad grounds, high resistance in the circuit, or opens in the circuit