If your vehicle started having issues after replacing the battery, the problem may be related to the ECM or PCM.
Voltage spikes, improper installation, or loss of stored data can sometimes trigger module failures or communication issues.
At AutoPCMS, we diagnose and repair ECM / PCM problems caused by electrical faults and battery-related issues.
Common symptoms after battery replacement:
- Vehicle won’t start
- Check engine light appears
- Loss of communication with scan tool
- Transmission stuck in limp mode
- Electrical systems behaving erratically
- Vehicle running rough or stalling
Why this happens:
- Voltage surge during battery install
- Improper reconnection sequence
- Corrupted ECM memory or programming
- Weak or incompatible battery
- Existing module damage triggered by power reset
Not sure if the ECM is damaged?
👉 Learn the top signs of a failing ECM
Dealer replacement can cost $1,500–$3,500+ and often requires programming.
We offer repair, testing, and plug-and-play solutions to get your vehicle back on the road quickly.
Still having issues after replacing your battery?
