AutoCodes – Dodge – P1121 Dodge

P1121 Dodge Code - Decreased Engine Performance Due To High Intake Air Temp

Quick Answer

P1121 Dodge indicates Decreased Engine Performance Due To High Intake Air Temp. Common causes for P1121 Dodge include wiring or connector problems, a faulty related sensor or actuator, and control module or calibration issues. 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: P1121 Dodge indicates Decreased Engine Performance Due To High Intake Air Temp.
Common causes: Common causes for P1121 Dodge include wiring or connector problems, a faulty related sensor or actuator, and control module or calibration issues.
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 4,739

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 Apr 25, 2019

Description
Step-by-Step Diagnostic Guide
How To Fix
Cost to Diagnose
FAQs
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Code P1121 Dodge Description

OBDII Code P1121 Dodge - Decreased Engine Performance Due To High Intake Air Temp - AutoCodes.com — P1121 Dodge Code - Decreased Engine Performance Due To High Intake Air Temp

How to Fix the DTC P1121 Dodge?

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 P1121 Dodge 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.

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Need more information on how to fix the P1121 Dodge code? Get Access to Factory Service Manuals

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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 P1121 Dodge Code

1. What are the common symptoms of OBDII code P1121 in a Dodge vehicle?

- Common symptoms include decreased engine performance, reduced fuel efficiency, and potential stalling or rough idling.

2. What does the OBDII code P1121 indicate in a Dodge vehicle?

- OBDII code P1121 indicates that there is a problem with high intake air temperature, leading to decreased engine performance.

3. What are the possible causes of OBDII code P1121 in a Dodge vehicle?

- Possible causes include a faulty intake air temperature sensor, issues with the air intake system, or a problem with the engine coolant temperature sensor.

4. How can I diagnose the cause of OBDII code P1121 in my Dodge vehicle?

- You can use a diagnostic scanner to retrieve the code and then inspect the intake air temperature sensor, air intake system, and engine coolant temperature sensor for any issues.

5. What are some repair tips for OBDII code P1121 in a Dodge vehicle?

- Repair tips may include replacing the faulty intake air temperature sensor, checking and cleaning the air intake system, and ensuring proper functioning of the engine coolant temperature sensor.

6. Can driving with OBDII code P1121 in a Dodge vehicle cause further damage?

- Continuing to drive with code P1121 may result in decreased engine performance, reduced fuel efficiency, and potential long-term damage to engine components.

7. How important is it to address OBDII code P1121 promptly in a Dodge vehicle?

- It is important to address code P1121 promptly to prevent further issues with engine performance and to avoid potential damage to the vehicle.

8. Are there any DIY fixes for OBDII code P1121 in a Dodge vehicle?

- DIY fixes may include checking and cleaning the air intake system, ensuring proper sensor connections, and replacing the intake air temperature sensor if necessary.

9. Can a mechanic help with diagnosing and repairing OBDII code P1121 in a Dodge vehicle?

- Yes, a qualified mechanic can use professional diagnostic tools to accurately diagnose the issue and provide the necessary repairs for code P1121.

10. How much does it typically cost to repair OBDII code P1121 in a Dodge vehicle?

- The cost of repairing code P1121 can vary depending on the specific cause of the issue, but it may involve sensor replacements, system inspections, and labor costs, which can range from a few hundred to over a thousand dollars.