U1029
Invalid Or Missing Data For Primary Id
U1029 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Primary Id. Common causes: damage to the can bus or wiring harnesses, malfunction of one of the electronic modules. Estimated repair cost: $17–167.
Symptoms
- Check Engine light comes on
- Malfunctions of various vehicle systems
- Problems starting the engine
- Lost connection with diagnostic equipment
- Incorrect operation of electronic systems
Causes
- Damage to the CAN bus or wiring harnesses
- Malfunction of one of the electronic modules
- Incorrect module programming
- Problems with power supply to electronic components
- Corrosion of contacts in connectors
How to Fix
- Check the integrity of the CAN bus and wiring harnesses
- Diagnose all associated electronic modules
- Check the quality of connections and contacts
- If necessary, reflash or replace the faulty module
- Check power supply of electronic components
Related codes
FAQ
What does the U1029 code mean?
U1029 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Primary Id
What causes a U1029 error code?
The most common causes of U1029 include: Damage to the CAN bus or wiring harnesses; Malfunction of one of the electronic modules; Incorrect module programming; Problems with power supply to electronic components.
How do I fix a U1029 diagnostic trouble code?
To fix U1029: Check the integrity of the CAN bus and wiring harnesses. Diagnose all associated electronic modules. Check the quality of connections and contacts. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1029?
Yes, but get it checked soon
How much does it cost to fix U1029?
The estimated repair cost for U1029 is $17–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat