7 Primus IQ Brake Controller Error Codes (With Fixes)

The Primus IQ Brake Controller it’s the best way to stop your large vehicle without causing any problems. Larger vehicles require extra braking power that smaller vehicles don’t need. This braking system will keep you and other people on the road safe by enabling you to stop quickly despite the load you carry.

Choosing a safe breaking option is the best way to protect yourself and everyone else in your RV, camper, or trailer. However, despite the benefits of using this braking system, you may encounter several error codes throughout your travels.

Please continue reading to learn the meaning behind the Primus IQ Brake Controller error codes and how you can resolve these problems. In addition, we will discuss how to identify these error codes and the common reasons these error codes appear

Primus IQ Brake Controller Error Codes

1. Blank Display

If you have a blank display, there’s nothing to stress about. Your display will go blank after a certain amount of time without activity. This braking system automatically enters power-saving mode after 15 minutes without activity.

To eliminate this problem, you must tap your brakes to reignite your display. Power saving mode allows you to use this braking system as often as necessary without recharging your batteries.

So, fight off the initial panic you feel when you see a blank display, and rest assured that it’s in power-saving mode.

2. O.9 Flashes on Display

If you see this on your display, it means there’s a trailer connected, but the battery ground connection has been lost.

The best way to prevent and resolve this problem is to ensure that you keep your ground location on the battery terminal that is already hardwired to your controller.

If you attempt to make your battery ground in a different location, you’ll experience this error code often.

After you reattach your controller to the popular grounding point, you shouldn’t encounter this error code anymore. If you continue to experience this problem, you’ll want to service your brake controller with a professional.

3. O.L Flashes On Display

There are a few reasons why the overload error flashes on your display. The first reason is that there are too many breaks for your controller to handle. This controller can only handle up to six brakes, so if you have any more than that, you’ll have an overload error.

Another reason you’ll experience this flashing overload error is if there’s something wrong with your circuit wiring.

So, if you know that you have less than six breaks powered by this controller, you’ll need to call a professional to check your wiring. You do not want to handle the wiring independently if you don’t have electrical experience.

4. 5H Flashes On Display

If your brake wiring experiences a shortage during idle conditions, you’ll see the 5H flashing error. In this situation, you’ll want to inspect your ground connections to ensure they are secure. If you see a loose connection, you’ll want to plug it in all the way to get rid of this error code.

Another reason you may experience this error code is if you’re using test lights that Tekonsha doesn’t distribute. If you’re using testing lights, you don’t need to worry about this error code because this is a common problem with testing lights.

5. Bottom Bars Flash On Display

When bars flash on your display, it indicates that there’s something wrong with the placement of your brake control mount.

For instance, if the bottom bars flash on your display, it means that your control mount is too low of an angle. Alternatively, if the upper bars flash on display, your control model is too high of an angle.

To get rid of this error code, you need to adjust the position of your brake control mount so that it sits correctly.

Correcting your brake control position will only take a couple of minutes, and you won’t have to deal with the error code again unless the mount gets jostled.

6. N.C. Flashes On Display

If NC flashes on your display, it means that your controller can’t sense an electrical connection with the brake magnets anymore. This situation has multiple causes you need to consider if you want to resolve the problem.

• Your trailer isn’t connected to your towing vehicle, which is why it can’t sense the magnets.
• Your trailer is connected, but your brake line has an open circuit. You’ll need to close this circuit to eliminate the error code.
• There’s corrosion on your trailer connector, and you’ll need to purchase a replacement to get rid of the error code. Unfortunately, it’s not uncommon for corrosion to occur on trailer connectors from weather damage.

This error code is the most frustrating on our list because you may encounter this problem for many reasons. Troubleshooting is hard when you have difficulty diagnosing the source of the issue.

7. P.L. Flashes on Display

You’ll experience this error code when there’s a power interruption as you press down on your brake pedal.

The main culprit of this problem is loose wiring, so you should check the red wire on your control panel to ensure everything’s secure. If you notice the loose wire, you’ll want to plug it back in to eliminate the error code.

This error code usually indicates a problem with the wiring, not the battery. If there were trouble with the battery, you wouldn’t only experience an issue when depressing the brakes.

Final Thoughts

This list comprises the most common error codes you’ll experience with the Primus IQ Brake Controller. Fortunately, most of these error codes don’t require professional intervention, and you can resolve the problem within a few minutes.

However, if you lack confidence when resolving a problem, you should always call a professional to handle the situation. Prioritize your safety over anything else, especially when electrical wiring is concerned.

This brake controller is a fantastic way to keep yourself and others safe on the road by enabling you to break quickly despite your cargo load. The error codes let you know when there’s something wrong with your brake controller so that you can resolve the problem and remain safe.