AutoCodes – Chrysler – U1102 Chrysler

U1102 Chrysler Code - Invalid Or Missing Data For Primary Id

Quick Answer

This is a manufacturer specific fault code and can be used for several different faults, depending upon what the manufacturer wants to use it for. Common causes include Faulty / intermittent ignition switch connections, J1850 / SCP / CAN Bus wiring intermittently open, shorted to power or ground, Faulty / intermittent connection at the Powertrain Control Module (PCM). 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: U1102 Chrysler indicates Invalid Or Missing Data For Primary Id.
Common causes: Common causes include Faulty / intermittent ignition switch connections, J1850 / SCP / CAN Bus wiring intermittently open, shorted to power or ground, Faulty / intermittent connection at the Powertrain Control Module (PCM).
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 3,179

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 Apr 22, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U1102 Chrysler Description

This is a manufacturer specific fault code and can be used for several different faults, depending upon what the manufacturer wants to use it for. Controllers communicate over the Serial Communication Protocol (SCP) bus network, also known as J1850 bus, or Controller Area Network or CAN Bus. These bus communication systems may or may not be fault tolerant, which means any type of intermittent/loose connection between these controllers could cause communication to stop. When these controllers are unable to communicate with each other at any time while the ignition switch is turned on, code U1102 will set.

OBDII Code U1102 Chrysler - Invalid Or Missing Data For Primary Id - AutoCodes.com — U1102 Chrysler Code - Invalid Or Missing Data For Primary Id

What does this mean?

What are the Possible Causes of the DTC U1102 Chrysler?

Faulty / intermittent ignition switch connections
J1850 / SCP / CAN Bus wiring intermittently open, shorted to power or ground
Faulty / intermittent connection at the Powertrain Control Module (PCM)
Faulty / intermittent connection at the Body Control Module (BCM)
Faulty / intermittent connection at the Instrument Panel Cluster (IPC)

How to Fix the DTC U1102 Chrysler?

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

This is typically an electrical wiring connection issue at one of the controllers being monitored by the manufacturer.
It can occur if:
Someone changes a battery while the ignition switch is left on, that is, left in the RUN position.
Someone flashes/upgrades their engine controller - other modules unable to communicate with PCM during this process - this will set U1102 at a multitude of controllers on the vehicle - all false codes. Erase and carry on.
May need to disconnect both battery cables and touch them together for 15 seconds. Reattach battery cables, positive first, then negative and see if a soft reset helps.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1102 Chrysler 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 Help with the Code?

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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 U1102 Chrysler Code

1. What is the OBDII code U1102 for Chrysler vehicles?

The OBDII code U1102 for Chrysler vehicles indicates "Invalid Or Missing Data For Primary Id."

2. What are common symptoms of the U1102 code in a Chrysler vehicle?

Common symptoms of the U1102 code may include issues with the vehicle's transmission, engine performance, or dashboard warning lights.

3. What are possible causes of the U1102 code in a Chrysler vehicle?

Possible causes of the U1102 code include faulty wiring or connections, a defective powertrain control module (PCM), or software issues.

4. How can I diagnose the U1102 code in my Chrysler vehicle?

Diagnosing the U1102 code typically involves using an OBDII scanner to retrieve the specific fault codes and then conducting a thorough inspection of the wiring, connectors, and PCM.

5. How can I repair the U1102 code in my Chrysler vehicle?

Repairing the U1102 code may involve repairing or replacing damaged wiring, ensuring all connections are secure, or reprogramming the PCM with updated software.

6. Can I drive my Chrysler vehicle with the U1102 code present?

It is not recommended to drive your Chrysler vehicle with the U1102 code present, as it can lead to further damage or unsafe driving conditions.

7. Will resetting the fault codes clear the U1102 code in my Chrysler vehicle?

Resetting the fault codes may temporarily clear the U1102 code, but it is important to address the underlying issue to prevent the code from reoccurring.

8. How much does it cost to repair the U1102 code in a Chrysler vehicle?

The cost of repairing the U1102 code in a Chrysler vehicle can vary depending on the specific cause of the issue and the labor rates of the repair shop.

9. Can the U1102 code be related to other codes in a Chrysler vehicle?

The U1102 code may be related to other codes in a Chrysler vehicle, especially if they are all related to communication or data issues within the vehicle's systems.

10. How can I prevent the U1102 code from appearing in my Chrysler vehicle in the future?

To prevent the U1102 code from appearing in the future, it is recommended to regularly service your vehicle, address any warning lights promptly, and ensure proper maintenance of the electrical system.