2021 Nissan-Datsun Sentra SFACTORY OEM SERVICE PROCEDURE

Component Inspection

  1. CHECK KNOCK SENSORΒ 
    1. Turn ignition switch OFF.
    2. Disconnect knock sensor harness connector.
    3. Check resistance between knock sensor terminals as follows.
      NOTE: It is necessary to use an ohmmeter which can measure more than 10 MOhms.

    Knock sensor

    Condition

    Resistance

    Terminal

    1

    2

    Temperature

    20 deg. C (68 deg. F)

    532 - 588 kOhms

    CAUTION: Never use any knock sensors that have been dropped or physically damaged. Use only new ones.

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Replace malfunctioning knock sensor. Refer to Exploded View .

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.