What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer communications
2Original wording in English
JEEP, RAM
Reported code forms B166E-13
Trailer Tow Lights Inoperative. Diagnostic Trouble Codes (DTCs) B166E-13 B17AD-13 May Be Set.
DODGE
Reported code forms B166E
TIPM FLASH - DIAGNOSTIC TROUBLE CODES B178C, B166E, B2215 FOR TRAILER TOW LAMPS INOPERATIVE INDICATING SHORT CIRCUITS IN THE WIRING ON THE TRAILER OR P1277 FOR NO CRANK - STARTER SOLENOID CURRENT EXCESSIVE. *TT
Check vehicle applicability
31A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Dodge | RAM | 2006 |
| Jeep | GRAND CHEROKEE | 2025 |
| Jeep | GRAND CHEROKEE | 2024 |
| Jeep | GRAND CHEROKEE | 2023 |
| Jeep | GRAND CHEROKEE | 2022 |
| Jeep | GRAND CHEROKEE | 2021 |
| Jeep | GRAND CHEROKEE 4XE | 2025 |
| Jeep | GRAND CHEROKEE 4XE | 2024 |
| Jeep | GRAND CHEROKEE 4XE | 2023 |
| Jeep | GRAND CHEROKEE 4XE | 2022 |
| Jeep | GRAND CHEROKEE 4XE | 2021 |
| Jeep | GRAND CHEROKEE L | 2025 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.