Engine-Codes - Nissan - P2100 2012 Nissan Altima Sedan

P2100 2012 Nissan Altima Sedan Code - Throttle Control Motor Relay Circuit Open

- Code Popularity: 5,945 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
Table of contents
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What are the Possible Causes of the DTC P2100 2012 Nissan Altima Sedan?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Dirty throttle body
  • Faulty Throttle Actuator Control Motor Relay
  • Throttle Actuator Control Motor Relay harness is open
  • Throttle Actuator Control Motor Relay circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

Code Tech Notes

Check Fuse #43 (see picture)

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How to Fix the DTC P2100 2012 Nissan Altima Sedan?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P2100 2012 Nissan Altima Sedan code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P2100 2012 Nissan Altima Sedan Code Mean?

The throttle actuator is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve. Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not provided to the ECM. The opening angle of the throttle valve is detected by the throttle position sensor which is mounted on the throttle body. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to control the throttle actuator and monitor the throttle opening angle in response to driver inputs.
P2100 2012 Nissan Altima Sedan Code - Throttle Control Motor Relay Circuit Open

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