Why won't my car start?

A car that won't start is usually caused by a dead battery, faulty starter motor, or failed alternator. If you hear clicking, the battery is most likely dead. No sound at all often points to the starter. A multimeter test on the battery (should read 12.4-12.7V) helps identify the problem.

Why is my check engine light on?

The check engine light is triggered by the OBD2 system when it detects an emissions or engine performance issue. Common causes include a loose gas cap, faulty O2 sensor, catalytic converter problems, or misfiring spark plugs. Use an OBD2 scanner to read the specific trouble code (e.g. P0300, P0420).

Why are my brakes squeaking?

Brake squeaking is most commonly caused by worn brake pads, glazed rotors, dust buildup, or cheap pad material. A grinding noise means pads are worn to metal-on-metal contact and need immediate replacement. Brake pad replacement typically costs $150–$350 per axle including labor.

Why is my car overheating?

Cars overheat due to low coolant levels, a failed thermostat, broken water pump, radiator leaks, or a blown head gasket. Pull over immediately if the temperature gauge hits the red zone. Running an overheating engine for even 5 minutes can cause $3,000+ in engine damage.

How do I know if my battery is bad?

Signs of a bad car battery include slow cranking, dim headlights, dashboard warning light, and needing frequent jump-starts. Most auto parts stores will test your battery free. A healthy battery should read 12.4–12.7 volts with the engine off. Car batteries typically last 3–5 years.

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Nissan Altima — Common Problems & Repair Help

Browse 15 common Nissan Altima problems with expert mechanic answers and diagnosis guides.

Won't Start

Nissan Altima Won't Start — Common Causes & Expert Fixes

Check Engine Light On

Nissan Altima Check Engine Light On — What It Means & Fixes

Overheating

Nissan Altima Overheating — Diagnosis & Cooling System Fixes

Brake Problems

Nissan Altima Brake Problems — Causes & Repair Guide

Transmission Slipping

Nissan Altima Transmission Slipping — Signs & How to Fix

Battery Keeps Dying

Nissan Altima Battery Keeps Dying — Causes & Solutions

Oil Leak

Nissan Altima Oil Leak — Where It Comes From & How to Fix It

Shaking / Vibrating

Nissan Altima Shaking & Vibrating — What's Wrong & Fixes

Squeaking Noise

Nissan Altima Squeaking Noise — Causes & How to Stop It

Grinding Noise

Nissan Altima Grinding Noise — What It Means & Repair Tips

AC Not Cooling

Nissan Altima AC Not Cooling — Diagnosis & Repair Guide

Power Steering Problems

Nissan Altima Power Steering Problems — Causes & Fixes

Alternator Problems

Nissan Altima Alternator Problems — Signs & Replacement

Spark Plug Replacement

Nissan Altima Spark Plug Replacement — When & How to Do It

Head Gasket Problems

Nissan Altima Head Gasket Problems — Symptoms & Repair Cost

About Nissan Altima Repairs

The Nissan Altima is one of the most popular vehicles on the road. Like any car, it can develop problems over time. Our community of certified mechanics has answered thousands of Nissan repair questions. Whether your Nissan Altima won't start, has a check engine light on, or is making strange noises, you'll find expert diagnosis and repair advice here.