The flashing key -- or sometimes a car outline with a key inside of it -- is the security indicator light. This light flashes when the ignition switch is placed in the OFF, LOCK or ACC position. The blinking security indicator light indicates that the security system(s) equipped on the vehicle are operational. Show The Nissan Anti-Theft System and the Nissan Vehicle Immobilizer System us this flashing key image to relay information to the driver about either the doors being unlocked or about the key itself. Fixing a concern with this light occasionally requires maintenance at a repair shop. The key sign on a Nissan Serena can be:
The dashboard light flashes a red key sign when the car is off and the doors are unlocked, while a solid red key illuminates if the car is off with the doors locked. A flashing green key sign appears if the battery in the key needs to be replaced. After replacing the battery, a simple relearn procedure must be performed. The illuminated red key sign with the ignition off informs the driver and passengers if the doors are locked. This light draws minimal current and will not drain the battery. The light is simply a normal communication function on the Nissan Serena. TipsIf the Nissan Vehicle Immobilizer System is malfunctioning, the light will remain on while the ignition switch is placed in the ON position. If the light remains on and/or the engine will not start, see a Nissan dealer for service as soon as possible. You should bring all registered keys that you have when visiting the Nissan dealer for service. The Nissan Sentra has been in production since 1982 and is currently on the 7th generation (B17). Here, we explore the dashboard warning lights for the Nissan Sentra. The symbols below will relate to many models of the Sentra, but focus primarily on the modern versions. Certain warning
lights (if vehicle equipped) illuminate on the Nissan Sentra dashboard when the ignition is switched on and go out after a short time. This is a self-check system and the following lights that come on are:  These warning lights will also illuminate but only very briefly: If any of the warning lights do not come on, it may indicate a burned-out bulb or a malfunction with that particular system. Now we’ll take a look at the Nissan Sentra dashboard warning lights that may come on when driving. It’s advisable to deal with amber / yellow warning lights as soon as possible and red warning lights immediately. Red warning lights are the most urgent and can potentially result in vehicle damage and/or risk to vehicle occupant safety. Importance: Medium Description: This is the Nissan Sentra anti-lock braking system (ABS) warning light. The symbol may also be displayed as What to Do: If an ABS malfunction occurs, the anti-lock function is no longer operational. The brake system continues to operate normally but without anti-lock assistance. Have system checked as soon as possible. The most frequent cause of fault is due to a malfunctioning wheel speed sensor. Importance: Medium Description: The Nissan Sentra Automatic Emergency Braking system (AEB) aids the driver when a risk of a forward collision with a vehicle ahead in same lane. To calculate distances, AEB uses a radar sensor located behind the lower grille of the front bumper. If a collision risk is detected, the system will provide a warning to the driver by a warning light and audible alarm. If the brakes are applied quickly and forcefully after the
warning, but AEB still detects a potential collision, the system automatically increases braking force. AEB can be manually turned off in the Setting / Driving Aids menu. Importance: High Description: The Nissan Sentra BRAKE warning light functions as a parking and foot brake systems. On other versions of the Sentra, the symbol may be displayed as
What to Do: If the light comes on when driving and the parking brake is not applied, stop as soon as it’s safe to do so and check brake fluid levels. Add brake fluid as necessary. If fluid levels are correct, this may indicate a fault with the braking system. Drive very carefully to an authorized Nissan dealer and have system checked immediately. Importance: High Description: The Nissan Sentra battery warning light indicates a fault with the charging system. The generator / alternator is not charging the battery sufficiently and the vehicle engine may stop shortly. What to Do: Immediately switch off any vehicle systems that are non-essential and that use electrical charge. Check the generator / alternator belt if it’s loose or broken. Check battery terminals for excessive corrosion or loose fitting. Do not continue driving if the generator belt is loose, broken or missing. Importance: Urgent Description: This is the Nissan Sentra low oil pressure dashboard warning light and must not be confused with the low oil levels light. If this light comes on or flickers while driving as safely but as quickly as possible stop and switch off the engine. Low oil pressure can very quickly cause serious engine damage which is not covered by your vehicle warranty. What to Do: Make arrangements to have your vehicle recovered. Importance: Medium Description: The tire with an exclamation point inside it is the Nissan Sentra low tire pressure warning light. The tire pressure monitoring system (TPMS) has detected that one or more tires are running at pressure values less than what is stored in the recommended system settings. If the TPMS has malfunctioned, the warning light will flash for approximately 1 minute with ignition set to ON and then remain on. What to Do: Stop as soon as possible and check tyres pressures and inflate in accordance with the tire and loading label located inside the driver door (B-pillar). After inflation, the warning light will not automatically go out. To do this, driver at 16 mph (25 km/h) or more to activate the TPMS. Importance: Varies Description: The amber triangle containing an exclamation point is the Nissan Sentra master warning light. The light illuminates for various reasons. What to Do: With the ignition switched to the ON position, the master warning light illuminates if any of the following are displayed on the vehicle information display:
Importance: Low Description: The ‘PS’ light is the Nissan Sentra power steering dashboard warning light. An alternative symbol is the steering wheel with an exclamation point What to Do: With a power steering fault, you’ll still be able to control the car, but steering will be harder to operate – particularity at slow speeds. This is not urgent but have system checked as soon as possible. Importance: Low Description: The shift P (Park) warning light flashes red and the key reminder alarm chime sounds if the ignition is set to OFF and the shift lever is in any position other than P (Park). What to Do: Return the shift lever to P (Park) with the ignition switch in the OFF position and the light will turn off. By placing the ignition switch to the LOCK position, the alarm chime will turn off. Importance: Medium Description: The Nissan Sentra air bag light should come on with the ignition for around 7 seconds then go out. This means the system is operational. The front air bag, curtain air bag, and pretensioner seat belt systems require maintenance if any of the following occur:
What to Do: Have system checked and repaired as soon as possible. The air bag systems may not be deployed during an impact. Possible causes can relate to loose cables under the front seat, passenger occupancy sensors, airbag module fault, objects inside the belt buckle. Importance: Low Description: The Nissan Sentra green cruise control illuminates when the system is active. What to Do: The cruise control light will blink / flash if a problem is detected. This may be due to the engine coolant temperature being too high, or the system has malfunctioned. Importance: Low Description: The Nissan Sentra Eco Mode helps the driver to drive in such a way that improves fuel economy. The ECO dashboard symbol illuminates when the ECO button is pressed. Importance: Low Description: The Nissan Sentra foot on pedal light is the engine start operation indicator dash light. What to Do: Apply the following based on your vehicle’s transmission:
Importance: Low Description: This symbol displays on the Nissan Sentra dashboard for Continuously Variable Transmission (CVT) models. This indicator light shows the position of the gear shift lever. Importance: Low Description: If equipped on your model of Nissan Sentra, this icon illuminates on the dashboard indicating that the front fog lights are on. Importance: Medium Description: The Nissan Sentra malfunction indicator light (MIL), also known as the ‘check engine light’ will comes on either flashing or steady. What to Do: Apply the following depending if the light is flashing or steady: Flashing: This indicates and engine misfire has been detected. This can result in damage to the emissions control system / catalytic converter. To reduce or avoid emission control system damage:
Steady: Check the fuel filler cap is securely fitted. After a few trips, the light should go out. If the fuel filler cap is not the problem, there’s a fault with the emissions control program. This is not urgent but may result in increased fuel consumption. Importance: Low Description: The Nissan Sentra Overdrive or OD is a feature for automatic cars that improves fuel efficiency by automatically selecting the highest gear and by keeping the engine RPM as low as possible. It’s recommended to keep overdrive ON when possible. What to Do: The O/D OFF light indicates that overdrive has been switched off. If you are driving up hills and the transmission is shifting a lot, take it out of OD. Importance: Low Description: The Nissan Sentra car with a key symbol is the security indicator light. This light blinks. What to Do: This applies on whether the light flashes or not:
Importance: Low Description: The Nissan Sentra vehicle dynamic control VDC has various features that help with the stability of the car. The system is active and operational on each engine start by default. You can manuall switch VDC off by pressing the switch. What to Do: There are two instances where this light may flash, or be stable:
Importance: Medium Description: The Nissan Sentra SERVICE ENGINE SOON warning light is an alternative to the malfunction indicator light as seen above. What to Do: Sensors in the vehicle have detected fault. Faults are usually related to emissions or possible a loose gas cap. If the light begins blinking, have vehicle checked immediately. A flashing SERVICE ENGINE NOW light may indicate misfire and potentially cause damage to the emissions control system. See MIL light above for further details. Importance: Low Description: The Nissan Sentra SPORT mode when activated adjusts the throttle sensitivity and transmission points to increase performance. What to Do: Though vehicle performance is increased, it’s likely that fuel economy will be reduced. What does a picture of a car with a key symbol mean?The immobilizer/key symbol indicates that the car is not able to recognize its keys. Sometimes, it could turn on due to some other problems with the immobilizer system.
What does the red car and lock light mean?What does the Red Car and Lock on the Dashboard mean? So what exactly is the flashing car and lock? This is actually your vehicle's way of telling you that its engine immobilizer is armed and working properly.
What does the key car light mean?This light illuminates when the vehicle control modules see the ignition turned without a key within range, there is a weak key battery, or there is a security error within the system.
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Red car with key symbol on dashboard Nissan Sentra
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