Experiencing intermittent starting problems with your Infiniti QX80 can be incredibly frustrating, especially when coupled with concerns about battery life. While you’ve diligently maintained your 2013 QX56, including regular fluid changes and addressing any unusual noises, the recurring issue of rapid battery depletion and random no-start situations is understandably worrying. Let’s delve into the potential role of your Qx80 Key Fob Battery and other factors that might be contributing to these problems.
One point you mentioned is changing the key fob battery when the yellow key light illuminated during a no-start incident. While a weak qx80 key fob battery is less likely to be the primary culprit behind your car’s main battery drain and starting issues, it’s still an important component to consider in modern vehicles. The key fob relies on battery power to communicate with your QX80’s security and convenience systems. A dying qx80 key fob battery can manifest in several ways, although not typically a complete no-start situation of the vehicle itself.
Signs of a Weak QX80 Key Fob Battery:
- Reduced Remote Range: You might notice you need to be closer to your QX80 for the remote to lock/unlock doors or activate the panic alarm.
- Intermittent Button Response: Buttons on your key fob may become less responsive, requiring multiple presses to function.
- “Key Battery Low” Warning: Some QX80 models display a warning message on the dashboard indicating a low key fob battery.
- Push-Button Start Issues (Less Common with Key Fob Battery Alone): In rare cases, a very weak key fob battery might cause intermittent issues with push-button start systems recognizing the key’s presence inside the vehicle. However, this is less likely to be a complete no-start scenario.
Replacing Your QX80 Key Fob Battery:
Changing the qx80 key fob battery is a straightforward process you can typically do yourself. You’ll generally need a small flathead screwdriver and the correct type of battery, usually a CR2032. Consult your QX80 owner’s manual for specific instructions on how to open your key fob and replace the battery. Ensuring your key fob has a fresh battery is a good piece of routine maintenance and eliminates it as a potential minor factor in any remote or security system glitches.
Investigating the Root Cause of Your QX80 Starting Problems:
While changing the qx80 key fob battery is a simple step, it’s unlikely to solve the core issues you’re experiencing, particularly the rapid main battery drain and random no-start events. The fact that Infiniti performed a draw test and found no parasitic drain is interesting, but doesn’t fully explain the repeated battery failures. Here are some additional avenues to explore:
- Intelligent Charging System: Infiniti disabling the intelligent charging system is noteworthy. As they suggested, these systems can sometimes malfunction in older vehicles. It’s possible this system was overcharging or improperly managing the battery, leading to premature failure. Monitor if disabling it improves battery life.
- Battery Quality and Specification: Ensure you are using the correct type and specification of battery recommended for your 2013 QX56/QX80. Using a battery with insufficient Cold Cranking Amps (CCA) or Reserve Capacity can lead to problems, especially in colder climates or with the demands of modern vehicle electronics. Consider a high-quality AGM (Absorbent Glass Mat) battery, which can often offer better performance and longevity.
- Alternator Output: Although your starter is new, have the alternator thoroughly tested to ensure it’s providing the correct voltage and amperage to charge the battery while the engine is running. An underperforming alternator can lead to a constantly undercharged battery and starting issues.
- Loose or Corroded Battery Terminals and Cables: Inspect your battery terminals and cables for any signs of corrosion or looseness. Clean terminals and ensure connections are tight. Corrosion can impede current flow, and loose connections can cause intermittent starting problems.
- Security System or Aftermarket Accessories: While the draw test came back negative, sometimes intermittent faults in the vehicle’s security system or aftermarket accessories (if installed) can cause unusual battery drain.
Moving Forward:
While addressing the qx80 key fob battery is a quick check, the persistent starting issues with your QX80 require a more systematic approach. Keep a close eye on whether disabling the intelligent charging system makes a difference. If the problems continue, consider seeking a second opinion from a reputable independent mechanic specializing in Japanese vehicles or automotive electrical systems. Providing them with a detailed history of the battery replacements, starting problems, and the dealer’s diagnosis will be crucial in helping them pinpoint the underlying cause and get your QX80 running reliably again.
