U1102 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 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.
Code U1102 Description
What are the Possible Causes of the DTC U1102?
- 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?
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.
Code Tech Notes
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 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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Information for Specific Makes
- U1102 Chrysler — Invalid Or Missing Data For Primary Id
- U1102 Dodge — Invalid Or Missing Data For Primary Id
- U1102 Jeep — Invalid Or Missing Data For Primary Id
Frequently Asked Questions about U1102 Code
1. What are common symptoms of OBDII code U1102?
- Common symptoms include dashboard warning lights illuminated, rough idling, poor acceleration, and potential stalling of the vehicle.
2. What does the OBDII code U1102 "Invalid Or Missing Data For Primary Id" indicate?
- This code indicates that the vehicle's primary identification information is either missing or invalid in the communication network.
3. What are possible causes of code U1102?
- Potential causes include faulty wiring connections, issues with the vehicle's network communication system, or a malfunction in the electronic control module.
4. How can I diagnose OBDII code U1102?
- Diagnosing the code typically involves using a professional OBDII scanner to retrieve the specific error codes and checking the vehicle's network connections for any faults.
5. Can I still drive my vehicle with code U1102 present?
- It is not recommended to drive the vehicle with this code present, as it can lead to potential performance issues and further damage to the vehicle if left unaddressed.
6. How can I repair OBDII code U1102?
- Repairing this code may involve checking and repairing any damaged wiring connections, resetting the electronic control module, or seeking professional help to diagnose and fix the underlying issue.
7. Is it necessary to reset the code after repairing U1102?
- Yes, it is recommended to reset the code after repairing U1102 to clear the error from the system and ensure proper functioning of the vehicle.
8. Can a DIY enthusiast fix OBDII code U1102 at home?
- While some basic troubleshooting steps can be taken at home, diagnosing and repairing OBDII code U1102 may require professional assistance due to the complexity of the vehicle's network communication system.
9. How much does it cost to fix OBDII code U1102?
- The cost of fixing this code can vary depending on the underlying issue, the need for replacement parts, and labor costs. It is advisable to get a diagnosis from a professional to determine the exact cost.
10. Are there any preventative measures to avoid OBDII code U1102 in the future?
- Regular maintenance checks, ensuring proper wiring connections, and promptly addressing any warning signs can help prevent issues that may trigger OBDII code U1102.
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