AutoCodes – Generic – C1929

C1929 Code - Air Suspension Front Compressor Relay Circuit Failure

Quick Answer

The Air Suspension Module monitors the Air Suspension Front Compressor Relay. Common causes include Faulty Air Suspension Front Compressor Relay, Air Suspension Front Compressor Relay harness is open or shorted, Air Suspension Front Compressor Relay 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
C1929 indicates Air Suspension Front Compressor Relay Circuit Failure.
Common causes
Common causes include Faulty Air Suspension Front Compressor Relay, Air Suspension Front Compressor Relay harness is open or shorted, Air Suspension Front Compressor Relay 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 7,542
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Dec 03, 2020
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Code C1929 Description

The Air Suspension Module monitors the Air Suspension Front Compressor Relay. The Air Suspension Module sets the OBDII code when the VAir Suspension Front Compressor Relay is not to factory specifications.
OBDII Code C1929 - Air Suspension Front Compressor Relay Circuit Failure - AutoCodes.com
C1929 Code - Air Suspension Front Compressor Relay Circuit Failure

What are the Possible Causes of the DTC C1929?

  • Faulty Air Suspension Front Compressor Relay
  • Air Suspension Front Compressor Relay harness is open or shorted
  • Air Suspension Front Compressor Relay circuit poor electrical connection

How to Fix the DTC C1929?

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 C1929 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 C1929 code?

Need more information on how to fix the C1929 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1929 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

  • C1929 Ford β€” Air Suspension Front Compressor Relay Circuit Failure
  • C1929 Lexus β€” Front Magnetic Pole Sensor Initialization Incomplete
  • C1929 Lincoln β€” Air Suspension Front Compressor Relay Circuit Failure
  • C1929 Mercury β€” Air Suspension Front Compressor Relay Circuit Failure
  • C1929 Toyota β€” Front Magnetic Pole Sensor Initialization Incomplete
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 C1929 Code

What does the OBDII code C1929 indicate?

The OBDII code C1929 indicates a failure in the air suspension front compressor relay circuit, which can affect the vehicle's air suspension system.

What are common symptoms of a C1929 code?

Common symptoms include a warning light on the dashboard, an inoperative air suspension system, uneven ride height, or a harsh ride due to reduced suspension performance.

What could cause the C1929 code to be triggered?

Causes may include a faulty air suspension compressor relay, damaged wiring, a blown fuse, or issues with the air suspension compressor itself.

How can I diagnose a C1929 code?

To diagnose the C1929 code, check the relay for proper operation, inspect the wiring and connectors for damage, test the compressor, and verify that the fuse is not blown.

What repairs can be made for a C1929 code?

Repairs may involve replacing the air suspension compressor relay, fixing or replacing damaged wiring, or replacing the air suspension compressor if it is found to be faulty.

Can I drive my vehicle with a C1929 code?

While you can drive your vehicle, it is not recommended as it may lead to compromised suspension performance and could potentially cause further damage to the air suspension system.

Is there a way to reset the C1929 code?

Yes, the C1929 code can be cleared using an OBDII scanner after the underlying issue has been resolved. However, addressing the root cause is essential to prevent reoccurrence.

Will a C1929 code affect my vehicle's safety?

Yes, a malfunctioning air suspension system can affect vehicle stability and handling, which may compromise safety, especially during turns or sudden stops.

How much does it typically cost to fix a C1929 code?

Repair costs can vary widely depending on the specific issue, but fixing the relay or wiring can range from $50 to $200, while a new air suspension compressor may cost $500 or more.

Can I perform repairs for a C1929 code myself?

If you have experience with automotive electrical systems, you may be able to perform basic diagnostics and repairs, such as replacing the relay or inspecting wiring. However, if you are unsure, it's best to consult a professional mechanic.

Discuss the causes and fixes for C1929 OBDII Code

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