AutoCodes – Generic – P1C17

P1C17 Code - Idle Control System RPM Higher Than Expected

Quick Answer

The Engine Control Module (ECM) monitors the Idle Control System. Common causes include Faulty Idle Control System, Idle Control System harness is open or shorted, Idle Control System circuit poor electrical connection. 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: P1C17 indicates Idle Control System RPM Higher Than Expected.
Common causes: Common causes include Faulty Idle Control System, Idle Control System harness is open or shorted, Idle Control System circuit poor electrical connection.
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 1,860

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 Mar 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1C17 Description

The Engine Control Module (ECM) monitors the Idle Control System. The ECM sets the OBDII code when the Idle Control System RPM is not to factory specifications.

OBDII Code P1C17 - Idle Control System RPM Higher Than Expected - AutoCodes.com — P1C17 Code - Idle Control System RPM Higher Than Expected

What does this mean?

What are the Possible Causes of the DTC P1C17?

Faulty Idle Control System
Idle Control System harness is open or shorted
Idle Control System circuit poor electrical connection

How to Fix the DTC P1C17?

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 P1C17 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 P1C17 code?

Need more information on how to fix the P1C17 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1C17 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1C17 Subaru — Idle Control System RPM Higher Than Expected

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 P1C17 Code

1. What are the common symptoms of OBDII code P1C17 (Idle Control System RPM Higher Than Expected)?

- Common symptoms include high idle speed, fluctuating idle speed, rough idle, and potential stalling of the engine.

2. What are the possible causes of OBDII code P1C17?

- Possible causes include a faulty idle air control valve, vacuum leaks, throttle body issues, dirty or clogged air filters, or a malfunctioning engine coolant temperature sensor.

3. How can I diagnose the cause of OBDII code P1C17?

- To diagnose the issue, you can perform a visual inspection for any obvious signs of damage or wear, check for vacuum leaks, test the idle air control valve, inspect the throttle body, and scan for any related codes.

4. What are some repair tips for resolving OBDII code P1C17?

- Repair tips include cleaning or replacing the idle air control valve, fixing any vacuum leaks, cleaning the throttle body, replacing the air filter, and ensuring proper functioning of the engine coolant temperature sensor.

5. Can OBDII code P1C17 cause damage to the engine if left untreated?

- While the code itself may not cause immediate damage, prolonged high idle speeds can lead to increased wear on engine components and decreased fuel efficiency. It is recommended to address the issue promptly.

6. Is it safe to continue driving with OBDII code P1C17 active?

- It is generally not recommended to drive with this code active, as it can lead to poor engine performance, potential stalling, and safety risks. It is best to address the underlying issue before driving the vehicle.

7. How much does it typically cost to repair OBDII code P1C17?

- The cost of repairing this code can vary depending on the specific cause of the issue and labor rates in your area. It is advisable to get a diagnostic from a qualified mechanic to determine the exact repair cost.

8. Can a DIY enthusiast fix OBDII code P1C17 at home?

- Depending on the underlying cause, some DIY enthusiasts with the necessary tools and knowledge may be able to address the issue at home. However, complex issues may require professional intervention.

9. Will resetting the OBDII code P1C17 resolve the problem permanently?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the high idle speed. It is important to diagnose and repair the root cause to prevent future occurrences.

10. How long does it take to repair OBDII code P1C17?

- The time needed to repair this code can vary based on the cause of the issue, availability of parts, and the skill level of the mechanic. Simple fixes may take a few hours, while more complex repairs could require more time.