Dodge W350 Has A Check Engine Light

Troubleshooting Common Causes for the Check Engine Light in Your Dodge W350 and How to Resolve Them

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
40% chance it's the
Emissions System
0%
60% chance it's
Something else
The most common reasons a Dodge W350 has a check engine light are an emissions system component, a sensor, or a catalytic converter.
  • Emissions System: A faulty emissions system component, such as an oxygen sensor or EGR valve, can lead to increased emissions and trigger the check engine light.
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.

How much does it cost to fix a Dodge W350 has a check engine light?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

A faulty oxygen sensor is one of the most common causes of a check engine light. Symptoms may include a decrease in fuel mileage, hesitation or misfiring from the engine, rough idling or even stalling. A faulty sensor may cause the vehicle to fail an emissions test.

Any time there is an emissions fault the check engine light will be displayed. The purpose of the check engine light is to inform the driver that an emission related fault has been found, and that there are on-board diagnostic (OBD) trouble codes stored in the powertrain or engine control module. Additionally, since the emissions systems are so intertwined into engine control and transmission control systems, symptoms may include nearly any sort of drivability concerns. This may include harsh shifting, failure to shift, hesitation on acceleration, jerking, engine failure to start or run, loss of power, or any number of other drivability issues.

Due to the nature of electrical systems on modern vehicles, the range of problems these can cause are nearly limitless. However, there is a way to categorize them in two ways. Permanent and intermittent problems. Permanent problems appear and remain. This may be the vehicle will not start, the radio does not work, or the door chime will not turn off among many, many others. These problems are more straight-forward to diagnose since they present themselves at all time. This means there will always be a fault to find. Intermittent electrical problems, however, can be difficult or impossible to locate, since they appear then disappear without warning. The best case scenario for an intermittent issue is when replicating the problem is easily accomplished and understood. This allows a technician to make an issue semi-permanent, allowing them to find the fault. Other issues that come and go without warning and cannot be replicated on demand must occur when the technician is servicing the vehicle, otherwise there is no problem to correct. It is most important to understand that electrical system faults always require inspection, and can include the vehicle working in any manner, or not working at all.

Like we noted in the last section, general diagnosis symptoms are the most vague of the bunch. There are several diagnostic spectrums, electrical diagnosis, drivability diagnostics, engine diagnostics, transmission diagnostics, and the list could continue for about 5 or 10 more spectrums of diagnostics. The most important take-away here, is that general diagnostics are diagnostics that have no other spectrum in which they fit, or the problem is unknown. This means that any vehicle left outside of a repair facility with the keys and an authorization to perform diagnosis will be diagnosed under the general diagnosis spectrum.

When the Check Engine Light comes on, you may experience engine performance issues such as poor acceleration, rough idling, or an engine that won't start. In some cases, no abnormal symptoms will be experienced. Other systems like the transmission or ABS can cause the Check Engine Light to illuminate and lights for those systems can come on at the same time. Similar lights may say "Check Engine Soon", "Malfunction Indicator Light" or just "Check". In rare case the engine can overheat.

Troubleshooting Check Engine Light in a Dodge W350

When faced with a Check Engine Light in your Dodge W350, it's essential to adopt a methodical diagnostic approach. Begin by checking the gas cap, as a loose or damaged cap can trigger the light; simply tighten it and monitor if the light resets after a few driving cycles. Next, inspect your dashboard for any additional warning lights that may provide clues about underlying issues, such as oil pressure or engine temperature alerts. If the light is flashing, this indicates a more serious problem, often related to engine misfires, which can lead to rough idling and decreased performance. In such cases, it's crucial to address the issue immediately to avoid potential engine damage. If these initial checks do not resolve the problem, or if the light continues to flash, it may be time to consult a professional mechanic for a thorough diagnostic assessment. By following this structured approach, you can effectively troubleshoot the Check Engine Light and maintain the performance of your Dodge W350.

What Common Problems Cause the Check Engine Light to Illuminate in a Dodge W350?

When the check engine light comes on in a Dodge W350, it often indicates underlying issues that can be addressed with some basic troubleshooting. One of the most frequent culprits is a problem with the fuel cap; if it is loose, broken, or missing, it can disrupt the fuel system's pressure and lead to the light illuminating. This is a simple fix that involves ensuring the cap is securely tightened or replacing it if necessary. Another common issue is a faulty oxygen sensor, which plays a vital role in monitoring the exhaust gases and relaying information to the engine control module. A malfunctioning sensor can affect engine performance and fuel efficiency, making it essential to check and replace it if needed. By being aware of these common problems, DIYers can take proactive steps to diagnose and resolve the check engine light issue, ensuring their Dodge W350 runs smoothly.

Why is the Check Engine Light On in a Dodge W350?

When the Check Engine Light illuminates in your Dodge W350, it serves as a crucial warning that should not be ignored. Neglecting this signal can lead to more severe problems, including decreased fuel efficiency, engine damage, or even safety hazards while driving. Common culprits behind the light's activation include a faulty oxygen sensor, which can disrupt the air-fuel mixture, or a failed spark plug or ignition coil that may cause misfires. Additionally, a malfunctioning mass airflow sensor can affect engine performance, while a loose or damaged gas cap can lead to fuel evaporation and emissions issues. If the catalytic converter is compromised, it can result in costly repairs and reduced vehicle efficiency. Addressing these issues promptly not only ensures the longevity of your vehicle but also enhances your safety on the road. Therefore, it is essential to diagnose and resolve the underlying problems as soon as the Check Engine Light appears.

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Dodge W350 Check Engine Light Causes & Repairs | RepairPal