2015 Nissan Altima Check Engine Light Codes

The 2015 Nissan Altima often reports common OBD-II codes such as P0420 (catalyst system efficiency), P0171 (lean condition), P0300 (random misfires), P0442 (EVAP small leak), and P0135 (O2 sensor heater circuit). Each of these codes points to different urgency and repair costs: ignoring P0300 can lead to engine damage and higher fuel use; untreated P0420 can cause catalytic converter failure, which is costly to replace; an unresolved P0171 may lead to poor performance and increased emissions; and EVAP leaks can fail emissions tests. Electrical and charging issues—like a weak battery or failing alternator—can create misleading or intermittent codes. At Larry H. Miller Nissan Mesa in Mesa, AZ, our factory-trained techs use OEM diagnostic tools to distinguish between sensor faults, wiring issues, and real mechanical failures. Choosing dealer diagnostics often reduces total cost because we fix the root cause the first time, protect warranty coverage, and offer OEM parts that last longer. If you notice a light, prompt diagnosis prevents secondary damage and yields immediate and long-term savings. To reduce downtime, schedule service online and check our service specials before your visit.

2015 Nissan Altima Check Engine Light Reset

Resetting the check engine light on a 2015 Nissan Altima is straightforward with the right tools, but a simple reset without proper diagnosis risks masking underlying issues. At Larry H. Miller Nissan Mesa we perform a full scan to read stored and pending codes, clear codes after verifying repairs, and perform test drives to ensure the fault does not return. We emphasize transparency: you receive a clear explanation of the cause, repair options, and cost estimate. Using OEM parts and factory procedures preserves warranty coverage and vehicle longevity—warranty repairs must be performed at a certified dealership to remain valid. We also offer service financing so you can get necessary work done now and pay over time, which helps avoid deferred repairs that become more expensive. Take advantage of our quick lane service and promotional offers on the service specials page, then schedule service for a confident, manufacturer-backed reset and repair.

Check Engine Light Flashing

A flashing check engine light on a 2015 Nissan Altima usually signals an active misfire that can quickly damage the catalytic converter and harm engine internals. This condition requires immediate attention—do not continue driving beyond a short, safe distance. Our Mesa service center prioritizes flashing-light cases and will inspect ignition components, fuel delivery, and the charging/battery system that can exacerbate misfires. While you’re here, we’ll evaluate battery health and offer battery replacement with OEM-recommended units if needed, ensuring reliable starts and stable electronics. We routinely run multi-point inspections and explain how timely service prevents larger bills later—delivering both immediate savings and reduced lifetime ownership costs. Check current offers on our service specials, and when you’re ready, schedule service online for fast assessment and repair. For urgent concerns, contact Larry H. Miller Nissan Mesa and let our certified technicians protect your vehicle and keep you moving safely.