P0592 Fault Code

Cruise Control Multi-Function Input B Circuit Low

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0592 fault code indicates an issue with the Cruise Control Multi-Function Input B Circuit, specifically that the signal is low. This can affect the functionality of the cruise control system, leading to potential safety concerns while driving. Understanding the operation of the cruise control system and the role of the multi-function switch is essential in diagnosing and resolving this issue.

What are the symptoms of the P0592 code?

Common symptoms associated with the P0592 code may include:

• Inability to set or maintain cruise control
• Warning lights on the dashboard, such as the check engine light
• Erratic cruise control behavior, if it engages intermittently
• Possible issues with other vehicle functions tied to the multi-function switch

What causes the P0592 code?

Several factors can contribute to this fault code, including:

• Faulty multi-function switch
• Damaged wiring or connectors in the cruise control circuit
• Short circuits or open circuits in the input signal
• Malfunctioning engine control module (ECM)
• Poor ground connections related to the cruise control system

How to fix P0592?

To resolve a P0592 fault code, the following steps are generally recommended:

1. Inspect the multi-function switch for proper operation and any signs of wear or damage.
2. Check the wiring and connectors for corrosion, damage, or loose connections.
3. Utilize a multimeter to test the cruise control circuit and verify that input signals are within specifications.
4. Replace the faulty multi-function switch if found defective.
5. Ensure all grounds related to the cruise control system are secure and functional.
6. If the issue persists, further diagnostics may be necessary, potentially including ECM inspection or replacement.