A warning light illuminated on the dashboard of your Honda HR-V often means that a fault code has been stored in systems such as SRS (Supplemental Restraint System, the airbag system), OBD (On-Board Diagnostics, the engine management diagnostic system) or the lambda sensor (which measures the oxygen level in the exhaust gases). Even after the original problem has been fixed, the light will stay on simply because the fault code has not been cleared from the memory. This regularly causes confusion among owners who think their car still has a defect. In this article you will discover how to read fault codes, what those lights actually mean and how you can reset them yourself.
What does a continuously illuminated warning light mean on the Honda HR-V?
The warning light, also known as the check engine light, stays on continuously when the engine management system has detected a fault and stored it as a fault code. On the Honda HR-V this often occurs due to issues with the CVT transmission (Continuously Variable Transmission, a stepless automatic gearbox), engine oil contamination on turbo models from 2019 onwards, or a faulty fuel pump. This light appears on your dashboard as a yellow engine symbol and remains on until the fault code is removed from memory.
It is important to know that the light does not automatically go out once you have solved the problem. The system stores the fault code and keeps the light on as a warning. This explains why many owners of a Honda HR-V with car problems still see the light even after a mechanic has replaced the faulty component. You have to clear the code manually with an OBD scanner or by temporarily disconnecting the battery.
‘ Each system stores its own fault codes and requires a specific reset method. ’
Common fault codes on the Honda HR-V
The Honda HR-V uses standard OBD-II fault codes that you can read via the driver information interface (the digital information display in the dashboard) or with an external scanner. Each light has its own meaning and points to a specific system. Below are the most common codes:
- P0300 to P0304: Ignition misfires, often caused by fouled spark plugs or oil dilution on turbo models
- P0841 to P0847: CVT pressure switch or sensor failures, leading to shuddering during acceleration
- P0171 and P0172: Air–fuel mixture too lean or too rich, usually due to a faulty fuel pump or lambda sensor
- U0100 and U0121: Communication issues with ABS or transmission modules, visible as an information light
In addition, other warning lights can also come on, such as the SRS light for the airbags, the VSA light (Vehicle Stability Assist, the stability control system) or the TPMS light (Tyre Pressure Monitoring System). Each system stores its own fault codes and requires a specific reset approach.
Reading fault codes yourself on the Honda HR-V
You do not have to go straight to the garage to read fault codes. With an affordable OBD-II scanner costing between 20 and 50 euros you can identify the codes yourself. Connect the scanner to the OBD port, which is located under the dashboard on the driver’s side, usually to the left of the steering wheel. Switch on the ignition without starting the engine and read the codes on the scanner screen.
Write the codes down and look up online what they mean. Most scanners also show a brief description. Note that not all systems are accessible via the standard OBD port. The SRS system for airbags often requires a specialised scanner that can dig deeper into the Honda system. For basic checks of the engine and transmission, however, a regular OBD scanner is fine.
Resetting the SRS light on the Honda HR-V
The SRS light comes on when a fault has been detected in the airbag system. This may be due to a faulty seatbelt pretensioner, an issue with the airbag sensor or even a loose connector under the seat. Some Honda HR-V models have had a recall for loose seatbelt pretensioners, so check whether your car is eligible for this.
To reset the SRS light you must first fix the cause of the fault code. You can then clear the code with a professional scanner that has access to the SRS system. Simply disconnecting the battery usually does not work for SRS codes, because this system is separately protected. If in doubt, contact a mechanic, as the airbag system is a safety-critical component that should not be underestimated.
Step-by-step guide for resetting fault codes
- Read the fault code with an OBD scanner and write the code down
- Resolve the underlying issue, for example replace a sensor or repair a leak
- Reconnect the scanner and select the option ‘clear codes’ or ‘erase fault codes’
- Start the engine and check whether the light stays off
- Drive a short distance to see whether the code returns
If the light comes back on immediately after being cleared, the problem has not been fully resolved or a second fault is active. In that case it is sensible to have the car checked by a specialist.
‘ This happens when the cause of the fault has not been fully resolved. ’
Why does the light sometimes stay on anyway?
Even after clearing fault codes, the warning light can return. This happens when the cause of the fault has not been fully resolved. On the Honda HR-V this regularly occurs with CVT transmission issues. Owners report that the light returns after driving a few kilometres because the transmission fluid has not been changed or the pressure switch is still defective.
Another common cause is oil dilution on turbo models from 2019 onwards. In this case fuel mixes with the engine oil, resulting in reduced lubrication and fault codes. Check the oil level regularly and change the oil more often than the standard maintenance schedule prescribes. Also drive a bit more briskly now and then to burn off fuel and bring the engine properly up to temperature.
Preventive maintenance to avoid warning lights
Regular maintenance prevents many faults that lead to a warning light. For the Honda HR-V this mainly means following the maintenance schedule for the CVT transmission. Change the CVT fluid every 30,000 to 48,000 kilometres, even if Honda says it is lifetime. Many owners report that this prevents shuddering and fault codes.
Also check the battery, fuses and coolant regularly. A weak battery can cause electronic fault codes that have nothing to do with a mechanical defect. Pay extra attention to the oil level and the colour of the oil on turbo models. If the oil looks too thin or smells of petrol, have it checked immediately.
When should you go to the garage?
Some faults you can solve yourself, but there are situations where it is better to go straight to a specialist. If the warning light is flashing instead of being continuously on, this indicates a serious problem such as severe ignition misfires. Do not continue driving then, as this can cause damage to the catalytic converter. If you also notice that the car performs poorly, makes strange noises or has starting issues, seek professional help.
Fault codes related to the fuel pump are also important. Many Honda HR-V models have had a recall for a faulty fuel pump that can lead to engine failure while driving. Check whether your car is eligible for this and have the repair carried out free of charge by a Honda dealer.
‘ Delve deeper into the world of car maintenance and stay informed about everything that keeps your Honda HR-V reliable. ’
Want to know more about your Honda HR-V?
On the Carnews website you will find extensive information about common problems, maintenance tips and experiences from other owners. Whether you are dealing with transmission issues, electrical faults or questions about recalls, there is always more to discover. Delve deeper into the world of car maintenance and stay informed about everything that keeps your Honda HR-V reliable.
Frequently asked questions
The most common causes of a warning light in a Honda HR-V are CVT transmission problems, engine oil contamination (especially on turbo engines from 2019 onwards), a faulty fuel pump, ignition/starting issues and various electrical or infotainment faults. Common OBD-II fault codes associated with these are P0300–P0304 (misfires), P0841–P0847 (CVT pressure/sensor signals), P0171/P0172 (mixture too lean/rich) and U0100/U0121 (communication problems with modules such as ABS or transmission). An OBD-II scanner is needed to read the exact code and determine the specific cause.
First check whether your engine oil and coolant levels are correct and top up if necessary. Then use a simple OBD-II scanner to read the fault codes to get an initial indication of the problem. Pay attention to noticeable symptoms such as jerky shifting (CVT), loss of power, strange noises or starting issues and note when they occur. Finally, check simple things yourself, such as battery connections, fuses and whether there are any outstanding Honda recalls on your HR-V.
You can usually continue driving carefully if the warning light is on continuously but the car otherwise drives normally (no strange noises, no juddering, no loss of power) and you have the fault codes read as soon as possible. You must take immediate action (stop safely and do not continue driving) if the light starts flashing, if the engine runs unevenly or judders, if the CVT starts to vibrate/shudder, or if other warning lights come on at the same time (e.g. oil or temperature). In that case first check the oil and coolant levels and preferably have the car towed to a garage. Never ignore a warning light for days on end, because known HR-V issues such as CVT wear, oil dilution or fuel pump failure can then quickly get worse.
The potential costs of fixing faults on a Honda HR-V vary greatly by fault code and cause. A simple reset or sensor issue can often be resolved for as little as a few tens of euros up to around €100, especially if it only involves diagnosis and a software update. Problems such as a faulty ignition starter switch are often around €200–€300, including labour. More complex issues such as CVT transmission problems or serious engine faults can range from several hundred euros to well over €1,000, depending on the exact damage and whether there is any warranty or a recall in place.
Prevent future faults by strictly following Honda’s maintenance schedule, including timely replacement of CVT fluid and engine oil and regularly checking oil and coolant levels. Have known recalls (such as those for the fuel pump and power steering) checked and carried out free of charge at the dealer. When a warning light comes on, use an OBD-II scanner straight away to read fault codes and tackle problems at an early stage. Also keep the software of the infotainment system and electronic modules up to date to minimise electrical and communication issues.
