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 wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P2066Fuel Level Sensor 2 PerformanceP2066Fuel Level Sensor 2 Performance (applies only to DJ/D2 vehicles)P2066Fuel Level Sensor 2 PerformanceP2066Fuel Level Sensor 2 Performance (Sales Codes ERB with AHB or AHV only)View all · Manufacturer wording →
Manufacturer communications
28Original wording in English
JEEP
Reported code forms P2066
Flash: Powertrain Control Module (PCM) Updates **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes…
JEEP
Reported code forms P2066
Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes…
GENESIS
Reported code forms P2066
Certain 2025MY GV80 and GV80 Coupe (JX1) vehicles equipped with the 3.5T-GDI Lambda III engine may NOT experience a warning lamp illumination of DTC P0461/P2066 when the calculated fuel consumption and the fuel…
GENESIS
Reported code forms P2066
Certain 2025MY GV80 and GV80 Coupe (JX1) vehicles equipped with the 3.5T-GDI Lambda III engine may NOT experience a warning lamp illumination of DTC P0461/P2066 when the calculated fuel consumption and the fuel…
JEEP
Reported code forms P2066
"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC): ● P2066 - Fuel…
MERCEDES-BENZ, MERCEDES-MAYBACH
Reported code forms P206600 P206609
Complaint Customer-perceived problem: • Fuel gauge reading implausible • MIL ON (market-dependent) N118/3 Fault codes in control units FSCM_GEN4/5/6 • For these fault codes, the tests contained in XENTRY must be carried…
Check vehicle applicability
277A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Cadillac | CTS | 2007 |
| Cadillac | CTS | 2006 |
| Cadillac | CTS | 2005 |
| Cadillac | CTS | 2004 |
| Cadillac | CTS | 2003 |
| Cadillac | SRX | 2007 |
| Cadillac | SRX | 2006 |
| Cadillac | SRX | 2005 |
| Cadillac | SRX | 2004 |
| Cadillac | STS | 2007 |
| Cadillac | STS | 2006 |
| Cadillac | STS | 2005 |
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.