Question about 2004 Nissan Sentra

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Location of Engine Control Module

I can't find the ECM under the hood of my Sentra. I want to replace the defective unit with a used ECM from the scrapyard.

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Why would a 6 year old vehicle need a new ECM?
If you can't find it,obviously your lost or misinformed

Posted on May 27, 2010


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Posted on Jan 02, 2017


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After scanning our car (golf 4) What comes up is 01314 Engine control module, d information attached is Engine control module inCorrectly equipped, pls what does it mean

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Where is the location of the ECM on a 1998 ford explorer?

ECM (Engine Control Module) is the old name to the new PCM
(Powertrain Control Module) denomination; this unit performs many functions on your car. The module accepts information from various engine sensors and computes the required fuel flow rate necessary to maintain the correct amount of air/fuel ratio throughout the entire engine operational range.

Based on the information that is received and programmed into the PCM's memory, the PCM generates output signals to control relays, actuators and solenoids.

The module is mounted under the hood on the firewall. On 493-94 models, it is mounted low on the firewall, near the left-hand fender (drivers side). On 495-99 models, it is mounted high on the firewall offset to the right-hand side of center.


Exploded view of the firewall PCM mounting for 493-94 models


Exploded view of the firewall PCM mounting for 495-99 models

  1. Disconnect the negative battery cable.
  2. Disengage the wiring harness connector from the PCM by loosening the connector retaining bolt, then pulling the connector from the module.
  3. Remove the two nuts and the PCM cover.
  4. Remove the PCM from the bracket by pulling the unit outward.
To install:
  1. Install the PCM in the mounting bracket.
  2. Install the PCM cover and tighten the two nuts.
  3. Attach the wiring harness connector to the module, then tighten the connector retaining bolt.
  4. Connect the negative battery cable.

Hope helps (remember comment and rated this).

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How many computers the new 2008 nissan sentra has and where they are located?

There is 1 ecm(electronic control module), 1 tcm(transmission control module), and a few other control units. The ecm is in the engine bay.

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Engine light is on

There is a Technical Service Bulletin (NTB04-037a) for this code to check the Engine Control Module (ECM) part number and if the ECM part number is listed in the TSB, it requres the dealer to reprogram the ECM. If the ECM part # is not listed, the TSB does not apply and then the problem is likely a defective Air/Fuel (A/F) Sensor.

May 31, 2008 | 2006 Nissan Sentra

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