Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Jeep Grand Cherokee Laredo, AWDFACTORY OEM SERVICE PROCEDURE
Module, Auto Headlamp Leveling (AHLM)
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| B167D-00 | FRONT HEADLAMP LEVELING SENSOR CIRCUIT PERFORMANCE |
| B1681-00 | REAR HEADLAMP LEVELING SENSOR CIRCUIT PERFORMANCE |
| B1685-00 | LEFT HEADLAMP LEVELING MOTOR CONTROL CIRCUIT PERFORMANCE |
| B168A-00 | RIGHT HEADLAMP LEVELING MOTOR CONTROL CIRCUIT PERFORMANCE |
| B2126-00 | SENSOR SUPPLY VOLTAGE LOW |
| B2127-00 | SENSOR SUPPLY VOLTAGE HIGH |
| B2199-16 | BATTERY VOLTAGE- CIRCUIT VOLTAGE BELOW THRESHOLD |
| B2199-17 | BATTERY VOLTAGE- CIRCUIT VOLTAGE ABOVE THRESHOLD |
| B21DD-16 | SYSTEM VOLTAGE-CIRCUIT VOLTAGE BELOW THRESHOLD |
| B21DD-17 | SYSTEM VOLTAGE-CIRCUIT VOLTAGE ABOVE THRESHOLD |
| B2286-00 | CALIBRATION NOT LEARNED/LOST CALIBRATION |
| U0002-00 | CAN C BUS OFF PERFORMANCE |
| U0132-00 | LOST COMMUNICATION WITH SUSPENSION CONTROL MODULE |
| U0141-00 | LOST COMMUNICATION WITH IPM (FCM/TIPM) |
| U1102-00 | LOST COMMUNICATION WITH LEFT HEADLAMP LEVELING CONTROL MODULE |
| U1103-00 | LOST COMMUNICATION WITH RIGHT HEADLAMP LEVELING CONTROL MODULE |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.