AutoCodes – Ford – P1726 Ford

P1726 Ford Code - Insufficient Engine Speed Decrease During Self-Test

Quick Answer

The Powertrain Control Module (PCM) monitors the engine speed during the Key On Engine Running (KOER) self-test. Common causes for P1726 Ford 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: P1726 Ford indicates Insufficient Engine Speed Decrease During Self-Test.
Common causes: Common causes for P1726 Ford 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 12,350

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 Jul 19, 2021

Description
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1726 Ford Description

The Powertrain Control Module (PCM) monitors the engine speed during the Key On Engine Running (KOER) self-test. When the PCM detects engine speed higher than a calibrated speed, the KOER self-test is aborted and this Diagnostic Trouble Code (DTC) sets.

OBDII Code P1726 Ford - Insufficient Engine Speed Decrease During Self-Test - AutoCodes.com — P1726 Ford Code - Insufficient Engine Speed Decrease During Self-Test

How to Fix the DTC P1726 Ford?

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 does this mean?

Code Tech Notes

The P1726 code will be set if during the Key On Engine Running (KOER) the engine RPM increases above the maximum threshold for a self-test.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1726 Ford 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 P1726 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1726 Ford 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 P1726 Ford Code

1. What are the common symptoms of OBDII code P1726 in a Ford vehicle?

- Common symptoms include rough idling, poor acceleration, and the vehicle stalling or hesitating during operation.

2. What does the OBDII code P1726 indicate in a Ford vehicle?

- The code P1726 indicates that there is insufficient engine speed decrease during the self-test.

3. What are the possible causes of OBDII code P1726 in a Ford vehicle?

- Possible causes include a faulty throttle position sensor, issues with the idle air control valve, vacuum leaks, or a malfunctioning electronic throttle control system.

4. How can I diagnose the cause of OBDII code P1726 in my Ford vehicle?

- It is recommended to use an OBDII scanner to retrieve the trouble codes and then perform a thorough inspection of the throttle position sensor, idle air control valve, vacuum lines, and electronic throttle control system.

5. Can I continue driving my Ford vehicle with OBDII code P1726?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage and potential safety hazards.

6. How can I repair OBDII code P1726 in my Ford vehicle?

- Repairing the issue may involve replacing the faulty throttle position sensor, idle air control valve, or addressing any vacuum leaks. It is recommended to consult a professional mechanic for proper diagnosis and repair.

7. Is it safe to reset the OBDII code P1726 in my Ford vehicle using a scanner?

- While you can reset the code using an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.

8. Will OBDII code P1726 cause my Ford vehicle to fail an emissions test?

- Yes, having this code present can cause your Ford vehicle to fail an emissions test due to improper engine performance.

9. How much can I expect to pay for repairs related to OBDII code P1726 in my Ford vehicle?

- The cost of repairs can vary depending on the specific cause of the issue and the labor rates in your area. It is recommended to obtain quotes from multiple mechanics for an accurate estimate.

10. Can a DIY enthusiast fix OBDII code P1726 in a Ford vehicle?

- While some DIY enthusiasts may be able to address simple causes like vacuum leaks, diagnosing and repairing more complex issues related to this code may require professional expertise.