P1637
Generator L-Terminal Circuit
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)
Symptoms
- Battery charge indicator is on
- Unstable voltage in the on-board network
- Low battery
- Problems with car electrical equipment
Causes
- Open or short circuit in the L-terminal circuit
- Generator malfunction
- Wiring harness damage
- Contact corrosion
- Faulty relay or fuse
How to Fix
- Check the continuity of the L-terminal circuit
- Inspect connectors and contacts for corrosion
- Check the functionality of the generator
- Replace damaged wires or connectors
- Check and replace relays and fuses if necessary