AutoCodes – Dodge – P1291 Dodge

P1291 Dodge Code - No Temperature Rise Seen From Intake Air Heater

Quick Answer

Temperature rise from intake air heaters is monitored for first 15 seconds of engine operation. Common causes include Air heater relay fault, Battery cable condition, Electrical circuit fault. 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: P1291 Dodge indicates No Temperature Rise Seen From Intake Air Heater.
Common causes: Common causes include Air heater relay fault, Battery cable condition, Electrical circuit fault.
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 16,445

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 07, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1291 Dodge Description

Temperature rise from intake air heaters is monitored for first 15 seconds of engine operation. The P1291 code may be stored if initial Intake Air Temperature (IAT) sensor reading is 0-66°F (-17.8 to 18.8°C), Battery Temperature Sensor (BTS) and Intake Air Temperature (IAT) sensor are within 10°F of each other, time between end of preheat and engine run state is less than 30 seconds, engine is cranked for less than 5 seconds before engine starts, preheat is completed before engine starts, post-heat is active and no IAT sensor or intake air heater relay DTCs exist.

OBDII Code P1291 Dodge - No Temperature Rise Seen From Intake Air Heater - AutoCodes.com — P1291 Dodge Code - No Temperature Rise Seen From Intake Air Heater

What does this mean?

What are the Possible Causes of the DTC P1291 Dodge?

Air heater relay fault
Battery cable condition
Electrical circuit fault

How to Fix the DTC P1291 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 P1291 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 P1291 Dodge code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1291 Dodge code diagnosed by a professional: Find a repair shop in your area

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 P1291 Dodge Code

1. What are the common symptoms of OBDII code P1291 in a Dodge vehicle?

- Common symptoms include slow engine warm-up, poor fuel efficiency, and possibly a Check Engine Light.

2. What does the OBDII code P1291 on a Dodge mean?

- The code indicates that the Powertrain Control Module (PCM) has detected no temperature rise from the intake air heater.

3. What are the possible causes of OBDII code P1291 in a Dodge?

- The code can be triggered by a faulty intake air heater, a defective intake air temperature sensor, a blown fuse, or wiring issues.

4. How can I diagnose the cause of OBDII code P1291 in my Dodge?

- Start by checking the intake air heater for proper operation, testing the intake air temperature sensor, inspecting fuses, and tracing the wiring for any damage.

5. Can I drive my Dodge with OBDII code P1291?

- It is not recommended to drive the vehicle with this code present, as it can lead to decreased performance and potential damage to the engine.

6. How can I repair OBDII code P1291 in my Dodge?

- Repair options include replacing the intake air heater, fixing or replacing the intake air temperature sensor, checking and replacing fuses if necessary, and repairing any damaged wiring.

7. Is it possible to reset OBDII code P1291 in a Dodge without fixing the issue?

- While you can clear the code with an OBDII scanner, it is important to address the underlying problem to prevent further issues.

8. Will OBDII code P1291 cause my Dodge to fail an emissions test?

- Yes, this code can cause your vehicle to fail an emissions test due to the impact on engine performance and emissions.

9. How much does it typically cost to fix OBDII code P1291 in a Dodge?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

10. Can a DIY enthusiast fix OBDII code P1291 in a Dodge?

- Depending on your skills and tools, you may be able to replace the intake air heater or intake air temperature sensor yourself. However, electrical diagnostics and repairs may require professional assistance.