2020 Mazda CX-5 Won't Start

Resolve Starting Issues for Your 2020 Mazda CX-5

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Reviewed by

Devin Cabugcal

Written by RepairPal Car Genius

Updated January 14, 2025

38% chance it's the

Battery

27% chance it's the

Alternator

20% chance it's the

Starter

15% chance it's

Something else

The most common reasons a 2020 Mazda CX-5 won't start are a dead battery, an alternator problem, or failed starter.

Battery: A weak or failing battery can result in difficulty starting the engine and electrical system malfunctions.
Alternator: A failing alternator can result in insufficient electrical power, leading to battery drain and electrical system malfunctions.
Starter: A faulty starter motor or a weak battery can prevent the engine from cranking properly, leading to starting issues.

Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

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RepairPal Certified shops can diagnose and repair your 2020 Mazda CX-5 engine and performance issues. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

What diagnostic steps should be taken to troubleshoot the starting issue in a 2020 Mazda CX-5?

When faced with a starting issue in your 2020 Mazda CX-5, it's essential to adopt a methodical diagnostic approach to effectively identify and resolve the problem. Begin by checking the battery, as a weak or dead battery is often the most straightforward culprit behind starting failures. If the battery is in good condition, move on to inspect the starter motor, which is crucial for turning the engine over. Next, examine the ignition switch, as a malfunction here can disrupt the electrical system's engagement. If these components check out, test the fuel system to ensure the fuel pump is operational and delivering fuel to the engine. Additionally, inspect the spark plugs for wear or damage, as faulty plugs can hinder ignition. Don't overlook the alternator, which must be functioning correctly to keep the battery charged while the engine runs. Finally, using a diagnostic scanner to check for error codes can provide insights into any underlying issues that may not be immediately apparent. By following this structured approach, you can effectively troubleshoot and resolve starting issues in your Mazda CX-5, ensuring a smoother driving experience.

What are the common problems that could cause a 2020 Mazda CX-5 to not start?

When your 2020 Mazda CX-5 refuses to start, it can be frustrating, but understanding the common problems can help you diagnose the issue effectively. One of the first things to check is the battery; a dead or weak battery is often the culprit, especially if the vehicle has been sitting idle or exposed to extreme weather. If the battery seems fine, the next step is to inspect the starter motor, as a faulty starter can prevent the engine from turning over. Additionally, issues within the fuel system, such as a clogged fuel filter or a malfunctioning fuel pump, can hinder fuel delivery, making it impossible for the engine to start. Don't overlook the ignition switch, as a malfunction here can disrupt the electrical system's engagement. Worn-out spark plugs may also be to blame, as they are essential for proper ignition. Furthermore, a defective alternator can lead to a drained battery, compounding the starting issue. Lastly, consider the vehicle's security system; a malfunctioning immobilizer can prevent the car from starting altogether. By systematically checking these components, you can identify and resolve the starting issues with your Mazda CX-5.

How urgent is it to address the starting issue in a 2020 Mazda CX-5?

When dealing with starting issues in a 2020 Mazda CX-5, it is crucial to assess the urgency of the situation to prevent further complications. If the vehicle fails to start or experiences intermittent issues, it is essential to act quickly, as these problems can lead to being stranded or may cause additional damage to the vehicle's electrical system. Warning lights on the dashboard serve as critical indicators; their illumination suggests that immediate attention is necessary to avoid safety hazards or more extensive repairs. Additionally, any unusual noises or smells during the starting process should not be ignored, as they may signal serious underlying issues that require prompt resolution. While some starting problems may stem from routine maintenance, addressing them in a timely manner is vital to maintaining the vehicle's reliability. If there is any uncertainty regarding the severity of the issue, consulting a qualified mechanic for a professional diagnosis is advisable. By prioritizing these concerns, you can ensure the longevity and safety of your Mazda CX-5.

Related 2020 Mazda CX-5 Problems

Read about related problems experienced by other Mazda CX-5 drivers like you.

Mazda CX-5 persistent dead battery issue after sitting for 10 days despite multiple replacements

Some Mazda CX-5 owners report experiencing persistent dead battery issues even after multiple replacements, particularly when the vehicle sits for 10 days or longer. These problems often manifest as slow cranking, which can indicate a failing battery and lead to difficulties starting the engine. Reports of ongoing battery drain and parasitic draw issues have been noted in Mazda CX-5 models, including up to the 2023 versions. In some cases, a parasitic draw occurs when an electrical component continues to draw power while the vehicle is off, exacerbating battery drain. Owners are advised to check for faulty electrical components that might be draining the battery and to consider potential malfunctions of the Remote Tuner module, which Mazda has acknowledged as a concern in certain models. To address these issues, it is recommended to have a professional mechanic inspect the vehicle for underlying electrical problems, check the Remote Tuner module's condition, and consider installing a battery disconnect switch to prevent parasitic draws. Regularly driving the vehicle or using a battery maintainer can also help keep the battery charged during periods of inactivity.

2 model years affected

Avg Mileage: 135,000

3 others reported problem

1 comment

Mazda CX-5 rear view camera fogging issue due to recall for improper sealing

Some Mazda CX-5 owners report experiencing rearview camera issues, including fogging problems due to improper sealing. These concerns are part of a larger recall affecting over 340,000 Mazda3 and Mazda CX-3 vehicles in the U.S. and Canada, where the wiring harness for the backup camera may become damaged from vibrations during normal use or when closing the liftgate. Additionally, some owners notice condensation or fog inside the front or rear combination lights, which could be related to the same wiring harness issues. The clear lenses on recent models may be particularly susceptible to fogging or condensation. It is recommended for Mazda CX-5 owners experiencing these problems to verify if their vehicle is included in the recall and to seek necessary repairs.

2 model years affected

2 others reported problem

1 comment

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