AutoCodes – Jeep – P1159 Jeep

P1159 Jeep Code - Improper Start Attempt

Quick Answer

The Engine Control Module (ECM) detected an engine speed above 100 RPM without the starter relay control activating Common causes for P1159 Jeep 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: P1159 Jeep indicates Improper Start Attempt.
Common causes: Common causes for P1159 Jeep 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,904

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 May 03, 2019

Description
How To Fix
Cost to Diagnose
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1159 Jeep Description

The Engine Control Module (ECM) detected an engine speed above 100 RPM without the starter relay control activating

OBDII Code P1159 Jeep - Improper Start Attempt - AutoCodes.com — P1159 Jeep Code - Improper Start Attempt

How to Fix the DTC P1159 Jeep?

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 P1159 Jeep 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 P1159 Jeep code?

Need more information on how to fix the P1159 Jeep code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1159 Jeep 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.