P0589 Cruise Control Multi-Function Input B Circuit

P0589 – OBD-II Trouble Code Technical Description

Cruise Control Multi-Function Input B Circuit

Sometimes a P0589 code can simply be caused by a fluid spill inside the vehicle. Keep your vehicle clean and in good working order and avoid costly, avoidable repairs.

What does trouble code P0589 mean?

A common transmission diagnostic trouble code (DTC) used in the OBD-II system for vehicles including Mazda, Alfa Romeo, Ford, Land Rover, Jeep, Dodge, Chrysler, Chevy, Nissan and others, indicates potential problems in the cruise control system . This code, P0589, indicates a malfunction in the cruise control system input circuit and its meaning may vary depending on the vehicle make and model.

The main purpose of cruise control is to maintain the vehicle speed set by the driver without having to hold down the accelerator pedal. This is especially useful on long trips and on monotonous sections of the road. The P0589 code indicates problems with the electrical circuit that controls this system.

To solve this problem, it is important to determine the exact location of the fault in the circuit and repair it. The letters in the P0589 code may indicate specific components or wires in the system. The service manual for your specific vehicle make and model will be your best resource for accurately diagnosing and solving the problem.

Possible reasons

Causes of a P0589 code may include:

1. Multi-function switch/cruise control switch malfunction such as stuck, broken or missing.
2. Damage to wiring due to corrosion or wear.
3. Corroded contacts, broken plastic parts of the connector, swollen connector body, etc. causing the connector to malfunction.
4. Abnormal mechanical operation caused by fluid, dirt or dust in the cruise control button/switch.
5. Problems with the ECM (engine control computer), such as moisture ingress, internal shorts, internal overheating and others.

What are the symptoms of a fault code? P0589?

It is important to know the symptoms of the problem in order to solve it. Here are the main symptoms of OBD code P0589:

• Abnormal vehicle speed.
• Inactive cruise control.
• The cruise control light is constantly on, regardless of the position of the switch.
• Inability to set the desired speed when using cruise control.
• Modified throttle response.
• Reduced fuel efficiency.
• Abnormal vehicle speed when cruise control is activated.

How to diagnose a fault code P0589?

A mechanic can use several methods to diagnose the P0589 trouble code:

1. Use an OBD-II scanner to check the stored P0589 code.
2. Check the condition of the fuses for blown ones.
3. Visually inspect wiring and connectors for damage or corrosion.
4. Check the vacuum hoses for damage.
5. Perform a vacuum pressure check.
6. Check the one-way vacuum valve (make sure air flows in one direction only).
7. Test the cruise control switch using a digital voltage/ohmmeter.

Diagnosis steps:

1. Check the condition of the multifunction/cruise control switch for dirt and smooth mechanical operation. If possible, monitor its operation via real-time DATA STREAM using an OBD scanner.
2. Clean the switch carefully, avoiding cleaning solutions directly on the button.
3. To access the input circuit connectors and wires, you may have to remove some of the dashboard plastic/casings. Work carefully to avoid damaging the plastic.
4. Test the switch using a multimeter, recording electrical values ​​during operation and in static mode.
5. Follow the instructions in your service manual for more detailed diagnostic steps.
6. If necessary, contact a professional to diagnose the problem with the ECM, given its high repair cost.

Diagnostic errors

Common mistakes when diagnosing code P0589:

If the fuse is blown, be aware that this may be a sign of a more serious problem. Therefore, be sure to check all stored diagnostic trouble codes (DTCs) and diagnose them in the order in which they appear. This will help eliminate the possibility of hidden problems that could cause the fuse to blow again or other problems.

How serious is the fault code? P0589?

What is the severity of the P0589 DTC?

This code is generally considered low in severity, especially in the context of cruise control problems. However, there are exceptions to this rule, and it's worth considering that electrical problems can get worse over time. In most cases, repairing this problem is quite affordable.

However, it is important to understand that assessing severity can be subjective. Therefore, it is recommended to conduct a comparative price analysis and obtain multiple quotes for diagnosis and repair. Sometimes even minor repairs can save you money and confidence in your car's performance. In any case, regular vehicle maintenance is always an important factor for its reliable operation.

What repair will help eliminate the code? P0589?

Here are a few methods that can be used to resolve OBD code P0589:

1. Check and repair damaged, corroded or loose wires and connectors.
2. Replace any blown fuses.
3. Replace damaged connectors.
4. Replace damaged vacuum hoses.
5. Replace the faulty one-way vacuum valve.
6. Replace the faulty cruise control switch.

What is P0589 Engine Code [Quick Guide]

P0589 – Brand-specific information

Trouble code P0589 may have some variations depending on the make and model of the vehicle. Here is a list of some car brands and their meanings for code P0589:

1. Ford: Cruise Control Multifunction Input “B” Circuit Range/Performance. (Cruise Control Multifunction Input “B” – Range/Performance).
2. Chevrolet: Cruise Control Multifunction Input “B” Circuit Range/Performance. (Cruise Control Multifunction Input “B” – Range/Performance).
3. Mazda: Cruise Control Multifunction Input “B” Circuit Range/Performance. (Cruise Control Multifunction Input “B” – Range/Performance).
4. Nissan: Cruise Control Multifunction Input “B” Circuit Range/Performance. (Cruise Control Multifunction Input “B” – Range/Performance).
5. Jeep: Cruise Control Multifunction Input “B” Circuit Range/Performance. (Cruise Control Multifunction Input “B” – Range/Performance).
6. Chrysler: Cruise Control Multifunction Input “B” Circuit Range/Performance. (Cruise Control Multifunction Input “B” – Range/Performance).
7. Dodge: Cruise Control Multifunction Input “B” Circuit Range/Performance. (Cruise Control Multifunction Input “B” – Range/Performance).
8. Alfa Romeo: Cruise Control Multifunction Input “B” Circuit Range/Performance. (Cruise Control Multifunction Input “B” – Range/Performance).
9. Land Rover: Cruise Control Multifunction Input “B” Circuit Range/Performance. (Cruise Control Multifunction Input “B” – Range/Performance).

Keep in mind that the specific interpretation of the P0589 code may vary slightly depending on the vehicle make and model. For an accurate diagnosis, it is always best to consult your specific vehicle's service manual.