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
21Original wording in English
VOLVO
Reported code forms U007700
This is a Technical Journal: MVBM-U007700 set together with ECM-P0A7B68 at PDS. Delete the DTC ́s. Do not reload MVBM software. IF the DTC ́s comes back together with MIL check engine light, perform the MVBM software
CADILLAC, CHEVROLET, GMC
Reported code forms U0077
This Preliminary Information communication provides information to the technician about vehicles that may have any of these concerns remote keyless entry, passive Entry and Start Inoperative, No Fob detect message on…
CADILLAC, CHEVROLET, GMC
Reported code forms U0077
This Preliminary Information communication provides information to the technician about vehicles that may have any of these concerns remote keyless entry, passive Entry and Start Inoperative, No Fob detect message on…
CADILLAC, CHEVROLET, GMC
Reported code forms U0077
This Preliminary Information communication provides information to the technician about vehicle with Service ABS and/or Traction control lights/message on, Service Power Steering System, Service Suspension System, and…
CHEVROLET
Reported code forms U0077
This Preliminary Information communication provides information to the technician about vehicles that have multiple Instrument Panel Cluster warning indicators on and/or warning messages being displayed on the Driver…
CHEVROLET, GMC
Reported code forms U0077
This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp, service Antilock Braking System, Service Stabilitrak, Service…
Check vehicle applicability
163A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Buick | LACROSSE | 2015 |
| Buick | LACROSSE | 2014 |
| Buick | LACROSSE | 2013 |
| Buick | LACROSSE | 2012 |
| Buick | LACROSSE | 2011 |
| Buick | LACROSSE | 2010 |
| Buick | REGAL | 2015 |
| Buick | REGAL | 2014 |
| Buick | REGAL | 2013 |
| Buick | REGAL | 2012 |
| Buick | REGAL | 2011 |
| Cadillac | ATS | 2015 |
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.