AutoCodes – Infiniti – P2103 Infiniti

P2103 Infiniti Code - Throttle Control Motor Relay Circuit Short

Quick Answer

The throttle actuator is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve. Common causes include Dirty throttle body, Faulty Throttle Actuator Control Motor Relay, Throttle Actuator Control Motor Relay harness is open. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P2103 Infiniti indicates Throttle Control Motor Relay Circuit Short.
Common causes: Common causes include Dirty throttle body, Faulty Throttle Actuator Control Motor Relay, Throttle Actuator Control Motor Relay harness is open.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 14,017

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Feb 28, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2103 Infiniti Description

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.

OBDII Code P2103 Infiniti - Throttle Control Motor Relay Circuit Short - AutoCodes.com — P2103 Infiniti Code - Throttle Control Motor Relay Circuit Short

What does this mean?

What are the Possible Causes of the DTC P2103 Infiniti?

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)

How to Fix the DTC P2103 Infiniti?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2103 Infiniti code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2103 Infiniti code?

Need more information on how to fix the P2103 Infiniti code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2103 Infiniti Code

1. What are the common symptoms of OBDII code P2103 in an Infiniti related to the Throttle Control Motor Relay Circuit Short?

The common symptoms include the vehicle going into limp mode, reduced engine power, and the inability to accelerate properly.

2. What are the possible causes of the OBDII code P2103 related to the Throttle Control Motor Relay Circuit Short in an Infiniti?

Possible causes include a faulty throttle control motor relay, damaged wiring or connectors in the circuit, or issues with the throttle control motor itself.

3. How can I diagnose the OBDII code P2103 in my Infiniti with the Throttle Control Motor Relay Circuit Short?

Diagnosis involves using a scan tool to retrieve the fault codes, checking the throttle control motor relay and related circuitry for damage or loose connections, and testing the throttle control motor for proper operation.

4. Can I still drive my Infiniti if the OBDII code P2103 with the Throttle Control Motor Relay Circuit Short is present?

It is not recommended to drive your vehicle with this code present, as it can lead to further damage and potentially unsafe driving conditions due to reduced engine power.

5. How do I repair the OBDII code P2103 related to the Throttle Control Motor Relay Circuit Short in my Infiniti?

Repair may involve replacing the faulty throttle control motor relay, repairing damaged wiring or connectors, or replacing the throttle control motor if necessary.

6. Are there any DIY tips for fixing the OBDII code P2103 in an Infiniti with the Throttle Control Motor Relay Circuit Short?

While some simple checks like inspecting for loose connections can be done by DIY enthusiasts, it is recommended to have a professional diagnose and repair this code to ensure proper resolution.

7. Is the OBDII code P2103 with the Throttle Control Motor Relay Circuit Short a common issue in Infiniti vehicles?

While not extremely common, this code can occur in Infiniti vehicles due to various factors such as age, wear and tear, or electrical issues.

8. Can resetting the ECU clear the OBDII code P2103 in an Infiniti related to the Throttle Control Motor Relay Circuit Short?

Resetting the ECU may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear once the problem is detected again.

9. Will driving with the OBDII code P2103 in an Infiniti cause further damage to the vehicle?

Continued driving with this code present can potentially cause damage to other engine components or lead to unsafe driving conditions, so it is best to address the issue promptly.

10. How much can I expect to pay for repairs related to the OBDII code P2103 with the Throttle Control Motor Relay Circuit Short in my Infiniti?

The cost of repairs can vary depending on the exact cause of the issue, but it is advisable to budget for diagnostic fees, parts replacement, and labor costs when addressing this code.