Experiencing problems with your 2018 Chrysler 300 key fob? A common culprit, and often the easiest to resolve, is the key fob battery. However, if replacing the battery doesn’t solve the issue, the problem might lie elsewhere, potentially within your vehicle’s system.
If you’re facing issues with both of your key fobs, it’s less likely to be a battery problem and more indicative of a car-side issue. One area to consider is the Wireless Control Module (WCM), also known as the RF Hub. This module is crucial for receiving signals from your key fob. Fault codes stored within the WCM can provide valuable clues when diagnosing key fob malfunctions.
Have you recently installed any aftermarket electrical accessories or LED lamps in your 2018 Chrysler 300? Sometimes, these additions can cause Radio Frequency Interference (RFI), which can disrupt or block the intended signals from your key fob to the vehicle. Removing these aftermarket items temporarily can help determine if they are the source of the interference.
To further diagnose potential WCM related issues, a scan for diagnostic trouble codes (DTCs) is recommended. Here are some potential WCM (RF Hub) codes that could be relevant if you are experiencing key fob problems, especially if a battery replacement has not resolved the issue:
- B1A10-00 – RKE FOB 1 BATTERY LOW
- B1A11-00 – RKE FOB 2 BATTERY LOW
These codes specifically indicate a low battery in the respective key fobs. However, if these codes are not present, or if replacing the battery doesn’t clear the problem, other codes related to the WCM or antenna systems become relevant. While a comprehensive list of potential codes is extensive, some examples of WCM related fault codes include:
- B1A08-00 – RKE FOB 1 PERFORMANCE
- B1A71-01 – PASSIVE ENTRY ANTENNA 1 – GENERAL ELECTRICAL FAILURE
- U0140-00 – LOST COMMUNICATION WITH BODY CONTROL MODULE
In conclusion, while a dead key fob battery is a frequent cause of key fob issues in a 2018 Chrysler 300, especially if only one fob is affected, problems with both fobs or persistent issues after battery replacement may point to more complex, car-side problems. Checking for WCM fault codes and considering potential RF interference are crucial steps in effectively diagnosing and resolving these issues. Consulting a qualified automotive technician is recommended for thorough diagnosis and repair, especially if fault codes beyond simple battery issues are present.
