When several warning lights come on at the same time in your Honda CR-V, it is almost always the result of a transmission fault, a computer malfunction or a weak 12V battery that disrupts the whole system. A hard reset often clears the fault code, but that is no guarantee that the problem has actually been fixed. This phenomenon often appears, especially during a cold start. What exactly is happening, what you can do yourself and when you should go to a garage, you can read below.
Why are all the lights on in the Honda CR-V at once?
If several warning lights come on at the same time, this rarely points to several separate problems. More often, there is one underlying fault that triggers a chain reaction in the car’s electronics. In the Honda CR-V, the cause in many cases lies with one of the following factors:
- A weakened or faulty 12V battery that does not supply enough power
- A transmission fault that disrupts several systems at once
- A computer fault in the driving control system or infotainment
- A sensor fault sending incorrect signals to the onboard computer
The CR-V’s onboard computer is sensitive to voltage fluctuations. As soon as the voltage in the electrical system drops or a sensor sends an incorrect signal, the ABS, TPMS (tyre pressure monitoring), the engine warning light and the battery light will come on almost simultaneously. That looks alarming, but it does not always mean that every system is individually defective.
Some owners report that this occurs more often during a cold start, especially in winter. At low temperatures, the battery performs less well, which can temporarily cause a drop in voltage. The onboard computer registers this as a fault and activates several warnings at once.
Resetting it yourself: how to deal with the warning lights
A hard reset can clear the fault codes and make the lights go out. This is a temporary measure, but it helps you assess whether it is an isolated glitch or a recurring fault.
Steps for a hard reset of the Honda CR-V
- Turn off the car and remove the key from the ignition.
- Wait at least 10 minutes so that the system fully relaxes.
- Then disconnect the negative terminal of the 12V battery.
- Wait another 5 minutes.
- Reconnect the battery and start the car again.
For some CR-V drivers, restarting via accessory mode (the position in which only the electrical systems are active) also helps: turn the ignition on without starting the engine, wait a moment and then start again. This resets the infotainment system and the onboard computer without disconnecting the battery. Please note: if the lights return after the reset, further diagnosis is needed. A reset clears the warning, but does not solve the underlying cause.
What the colour of the light tells you
Not every lit warning light calls for the same response. The colour tells you immediately how urgent the situation is.
- Green or blue: a system is active, such as the indicator or a driver assistance feature. No action needed.
- Yellow or amber: have the car checked. In most cases you can still keep driving, but arrange a garage visit soon.
- Red: stop the car safely and do not continue driving until the cause is clear.
A red oil pressure warning light calls for immediate action. If you keep driving while the oil pressure is too low, the engine can be severely damaged within a short time. A yellow TPMS light is less urgent, but you should still check the tyre pressures as soon as possible.
Most discussed lights among CR-V owners
In forums and user groups around the Honda CR-V 2019, a number of specific warnings keep coming back. Recognising the pattern helps you assess more quickly what is going on.
ABS light
A fault in the anti-lock braking system (ABS) means that this system no longer intervenes actively during hard braking. The brakes still work, but without the added safety of ABS. Have this checked with a diagnostic tool (a device that reads the car’s fault codes) that reads the specific fault code.
Engine warning light (check engine)
This light appears for a wide range of faults, from a loose fuel filler cap to a defective oxygen sensor. If the engine warning light comes on together with other lights after a cold start, a sensor fault or an acute voltage problem is a plausible cause. Have the fault code read at a garage or by a motorcycle specialist with an OBD2 scanner (a device that reads the car’s fault via the diagnostic port).
Battery light
The battery light points to a charging problem or a faulty alternator. The car may still run on the battery for a while, but only temporarily. Especially if this light appears together with other warnings, there is a good chance that a weak battery is the main cause.
TPMS light (tyre pressure)
This is one of the most commonly reported lights among CR-V drivers. Check the tyre pressure of all four tyres straight away. If the pressure is correct, the TPMS sensor itself may be sending an incorrect signal. This often happens after changing tyres.
‘ Red means stop, yellow means plan, green or blue means information. ’
When is a reset not enough?
A hard reset helps test whether it is only a temporary glitch. If the lights come back within a few journeys, there is almost certainly an underlying technical problem. In that case, have a garage read the fault codes with a diagnostic tool. This gives insight into which system caused the fault and prevents you from replacing parts by guesswork.
If you are unsure about the urgency of a warning, always use the colour code as your starting point. Red means stop, yellow means plan, green or blue means information. That simple division helps you make the right decision quickly, without panicking unnecessarily.
Want to know more about your Honda CR-V?
On the Carnews website you will find much more information about common problems, maintenance tips and technical explanations for the Honda CR-V. Whether you are looking for the meaning of a specific warning light or want to know more about your car’s reliability, relevant information is always available. Discover everything on Carnews and stay well informed about your Honda CR-V.
Frequently asked questions
You should take immediate action as soon as a red warning light comes on: pull over safely and switch off the engine. This applies especially to the oil pressure light, the temperature light (overheating), a serious brake warning or a bright red battery light. If such a red light stays on, do not use the car any further until a mechanic has investigated the problem. With yellow/amber lights, you can usually keep driving for a short time, but you should still have it checked as soon as possible.
In a Honda CR-V, the red lights in particular indicate a critical problem: the oil pressure light (switch off the engine immediately, risk of serious engine damage), the coolant temperature light in case of overheating (stop safely, let the engine cool down) and a red brake warning (brakes may fail). A red battery light is also critical because the charging system may fail and the car could then cut out unexpectedly. A flashing engine warning light (check engine) can also be critical, for example in the case of serious ignition problems that can damage the catalytic converter. With these signals, you should stop safely as soon as possible and not use the car any further until the cause has been identified.
The most common causes of warning lights in Honda CR-Vs are faults in ABS, tyre pressure (TPMS) and the engine management system (check engine). In addition, oil (pressure) and temperature lights often indicate problems caused by low oil levels, worn oil or coolant/cooling system faults. The battery light is common with charging problems or a weak/dead 12V battery. Brake warnings (parking brake, wear, fluid level) and airbag/SRS faults are also reported regularly.
First check the colour and symbol of the light in the handbook so you know how serious it is. Then look at simple things yourself, such as tyre pressures, oil level, coolant level and whether the parking brake is actually released. Note when and how the light comes on (steady or flashing, at cold start or with a warm engine) and any unusual noises or loss of power. If the light is red or starts flashing: stop safely as soon as possible, do not keep driving and have the car taken to the garage with this information.
What ‘maintenance tips’ are there to prevent unnecessary ‘warning lights’ from coming on in a Honda CR-V?
Keep the tyre pressures regularly at the correct level and check the oil level, coolant level and washer fluid according to the service book to prevent common warnings. Have the 12V battery tested periodically and replaced in good time, because voltage problems in the CR-V can often trigger several false lights at once. Carry out the prescribed maintenance (filters, spark plugs, brakes) on time to avoid engine, ABS and brake warnings. Respond immediately to minor changes (odd noises, steering vibration, brake feel) so that a garage can resolve an emerging problem before a warning light comes on.
