AutoCodes – Jeep – P1002 Jeep

P1002 Jeep Code - Ignition Key Off Timer Performance Too Slow

Quick Answer

The Transmission Control Module (TCM) uses ignition off time to enable other diagnostic tests. Common causes include Faulty Ignition Switch, Ignition Switch harness is open or shorted, Ignition Switch 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: P1002 Jeep indicates Ignition Key Off Timer Performance Too Slow.
Common causes: Common causes include Faulty Ignition Switch, Ignition Switch harness is open or shorted, Ignition Switch 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 5,847

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 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1002 Jeep Description

The Transmission Control Module (TCM) uses ignition off time to enable other diagnostic tests. The TCM must verify the proper operation of the ignition off timer to ensure the diagnostic tests are performed within the proper enable conditions. The ignition off timer value is stored in the Cabin Compartment Node (CCN). The CCN will send the ignition off time message to the Totally Integrated Power Module (TIPM). The TIPM broadcasts the ignition off time over the CAN bus. The TCM receives the message and then compares the ignition off timer value to the Engine Coolant Ignition off temperature and the Engine Coolant Start-up Temperature message. The Diagnostic Trouble Code (DTC) will set if the ignition off time is less than a calibrated value based on Engine Coolant Ignition off Temperature and the Engine Coolant Start-up Temperature.

OBDII Code P1002 Jeep - Ignition Key Off Timer Performance Too Slow - AutoCodes.com — P1002 Jeep Code - Ignition Key Off Timer Performance Too Slow

What does this mean?

What are the Possible Causes of the DTC P1002 Jeep?

Faulty Ignition Switch
Ignition Switch harness is open or shorted
Ignition Switch circuit poor electrical connection
Faulty Cabin Compartment Node (CCN)

How to Fix the DTC P1002 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 P1002 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.

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Get the P1002 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.

Frequently Asked Questions about P1002 Jeep Code

1. What are the common symptoms of OBDII code P1002 in a Jeep related to Ignition Key Off Timer Performance Too Slow?

- Common symptoms include a persistent Check Engine light, difficulty starting the vehicle, and potential battery drain issues.

2. What are the possible causes of the OBDII code P1002 in a Jeep indicating Ignition Key Off Timer Performance Too Slow?

- Possible causes may include a faulty ignition switch, a malfunctioning ignition key cylinder, or issues with the vehicle's computer system.

3. How can I diagnose the OBDII code P1002 in my Jeep related to Ignition Key Off Timer Performance Too Slow?

- A thorough diagnostic procedure by a qualified technician using an OBDII scanner to retrieve the fault codes and inspecting the ignition system is recommended.

4. What should I do if I encounter the OBDII code P1002 in my Jeep due to Ignition Key Off Timer Performance Too Slow?

- It is advised to address the issue promptly by seeking professional help to accurately diagnose and repair the underlying cause to prevent further complications.

5. Are there any DIY repair tips for resolving the OBDII code P1002 in a Jeep associated with Ignition Key Off Timer Performance Too Slow?

- DIY repair tips include checking for loose connections, ensuring the key cylinder is functioning correctly, and examining the ignition switch for any signs of wear or damage.

6. Can driving with the OBDII code P1002 in a Jeep indicating Ignition Key Off Timer Performance Too Slow cause any long-term damage?

- Continuing to drive with this code may potentially lead to further electrical issues and could affect the overall performance of the vehicle if left unaddressed.

7. How much does it typically cost to repair the OBDII code P1002 in a Jeep related to Ignition Key Off Timer Performance Too Slow?

- Repair costs can vary depending on the exact cause of the issue, but they may range from a simple fix to a more complex repair involving the ignition system components.

8. Is it safe to drive my Jeep with the OBDII code P1002 displaying Ignition Key Off Timer Performance Too Slow?

- While it may be safe to drive in the short term, it is recommended to address the underlying issue promptly to avoid any potential safety hazards or further damage to the vehicle.

9. Can a faulty battery be a possible cause of the OBDII code P1002 in a Jeep related to Ignition Key Off Timer Performance Too Slow?

- Yes, a weak or failing battery could potentially trigger this code due to insufficient power supply affecting the ignition system's performance.

10. How long does it usually take to repair the OBDII code P1002 in a Jeep indicating Ignition Key Off Timer Performance Too Slow?

- The repair time can vary depending on the exact cause of the issue and the availability of parts, but it is typically resolved within a few hours to a day at a repair shop.