RAM Code P203F is a diesel exhaust fluid (DEF) system that can result in a warning if the fluid level is too low. This code is usually found in RAM vehicles and is identified by an EVIC message reads “DEF Low REFILL Soon.” A chime accompanies this message, and the vehicle’s speed is limited to 5 mph. The cause of this message is a low DEF tank level, and there are a variety of solutions to the problem. To help RAM owners understand this problem and the answers, this article outlines various causes and solutions related to RAM Code P203F.
⚡️Other article: RAM Code P026A
Causes and Solutions for RAM Code P203F
| Cause | Solution |
|---|---|
| Incorrect DEF fluid | Use only DEF fluid approved by RAM |
| DEF tank vent tube clogged | Clean the DEF tank vent tube |
| DEF tank level incorrect | Check the DEF tank level and refill as needed |
| DEF tank damaged | Replace the DEF tank if damage is found |
Incorrect DEF Fluid
One of the most common causes of RAM Code P203F is the use of incorrect DEF fluid. RAM must approve the DEF fluid used in RAM vehicles and meet specific standards. If the wrong type of DEF fluid is used, the car cannot detect the correct fluid level and will trigger the P203F code. RAM owners should only use DEF fluid approved by RAM to resolve this issue.
DEF Tank Vent Tube Clogged
Another possible cause of RAM Code P203F is a clogged DEF tank vent tube. The DEF tank vent tube is an important component of the DEF system and must remain debris-free for the system to function properly. If the vent tube becomes clogged, the system cannot accurately detect the level of the DEF fluid and will trigger the P203F code. To resolve this issue, RAM owners should clean the DEF tank vent tube and make sure it is clear of all debris.
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DEF Tank Level Incorrect
If the DEF tank level is incorrect, the vehicle will also trigger the P203F code. This can occur if the DEF tank is not properly filled or the DEF fluid has leaked. To resolve this issue, RAM owners should check the level of the DEF tank and refill it as needed.
DEF Tank Damaged
Finally, if the DEF tank is damaged or leaks, the vehicle will trigger the P203F code. RAM owners should inspect the DEF tank for any damage or leaks to resolve this issue. If damage is found, the tank should be replaced.
Conclusion
RAM Code P203F is a diesel exhaust fluid (DEF) system code that various issues can cause. These issues can range from incorrect DEF fluid to a damaged DEF tank. To resolve the issue, RAM owners should inspect the DEF system for any damage, refill the DEF tank as needed, and only use DEF fluid approved by RAM. With the right solutions, RAM owners can quickly address the RAM Code P203F issue and bring their vehicles back to normal operation.
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