Having your remote start fail and the check engine light illuminate simultaneously can be frustrating. This situation suggests a potential underlying electrical or system malfunction that requires careful diagnosis. This guide will walk you through troubleshooting common causes and steps to take to get your remote start working again.
Why is my remote start not working and my check engine light on?
This dual problem points towards a connection between your vehicle's computer system and the remote start system. The check engine light indicates a problem detected by the onboard diagnostics (OBD) system. This problem could be directly related to the remote start malfunction or an unrelated issue that indirectly affects it.
What are the possible causes?
Several factors can contribute to both a faulty remote start and an illuminated check engine light. Let's explore some common culprits:
1. Low Battery:
- Explanation: A weak battery can prevent the remote start system from functioning correctly and trigger a check engine light, as various vehicle systems rely on sufficient power.
- Troubleshooting: Check your battery voltage using a multimeter. If it's low, charge or replace the battery.
2. Faulty Remote Start System Components:
- Explanation: Issues within the remote start system itself – such as a faulty antenna, control module, or wiring harness – could be at fault. These malfunctions can sometimes trigger diagnostic trouble codes (DTCs) that illuminate the check engine light.
- Troubleshooting: This requires a professional diagnosis, as pinpointing the exact faulty component may need specialized tools and expertise.
3. OBD System Issues:
- Explanation: The check engine light may be unrelated to the remote starter. A separate problem detected by the OBD system could be causing the light to illuminate, and this could indirectly affect the remote start.
- Troubleshooting: Use an OBD-II scanner to retrieve diagnostic trouble codes. These codes provide valuable information about the specific issue causing the check engine light to turn on. Consult a repair manual or online resources to interpret the codes.
4. Software Glitches:
- Explanation: In some cases, software glitches within the vehicle's computer system or the remote start module can lead to malfunctions and trigger the check engine light.
- Troubleshooting: A qualified mechanic may be able to perform a software update or reset to resolve the issue.
5. Security System Interference:
- Explanation: Your vehicle's security system might be interfering with the remote start system, preventing it from engaging and possibly triggering a code.
- Troubleshooting: Check your vehicle's owner's manual for information on disabling or troubleshooting the security system.
6. Improper Installation (if aftermarket):
- Explanation: If you have an aftermarket remote start system, improper installation is a significant possibility. Loose wires or incorrectly connected components can lead to malfunction and trigger codes.
- Troubleshooting: If you installed it yourself, double-check all connections. If professionally installed, contact the installer.
How can I fix it?
The best approach depends on the root cause, which needs to be identified. Here's a breakdown of how to proceed:
- Step 1: Check the Battery: This is the easiest and most important first step. A low battery can mimic many electrical problems.
- Step 2: Use an OBD-II Scanner: Retrieve the diagnostic trouble codes to pinpoint the specific problem.
- Step 3: Consult Your Owner's Manual: Your manual provides valuable troubleshooting tips specific to your vehicle and remote start system.
- Step 4: Contact a Professional: If you can't identify and fix the issue yourself, consult a qualified mechanic specializing in automotive electrical systems or remote starters.
What if the problem persists?
If you've tried the above steps and the problem remains, it's crucial to seek professional help. A qualified technician has the tools and expertise to accurately diagnose and repair complex electrical issues within your vehicle. Ignoring the check engine light and remote start malfunction can potentially lead to more significant problems down the line.
Remember, this information is for general guidance. Always refer to your vehicle's owner's manual for specific instructions and recommendations. Improper repairs can lead to further damage. If you're not comfortable working on your vehicle's electrical system, leave it to a professional.
