P0556: owner reports and bulletins
Got P0556 on your scanner? Tell the mechanic your year, make, model and any symptoms and you'll get the likely cause and what to check first. Ask about this code.
What owners report to NHTSA
13 complaints filed with NHTSA mention P0556, 13 of them since 2015, across 6 different models. The component owners most often filed it under: service brakes.
Most-reported models
| Vehicle | Complaints | Model years reported |
|---|---|---|
| CHEVROLET MALIBU | 6 | 2016, 2017, 2019, 2020 |
| GMC TERRAIN | 3 | 2020 |
Manufacturer service bulletins that name P0556
43 technical service bulletins and manufacturer communications filed with NHTSA mention P0556, from 4 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:
- VOLKSWAGEN TIGUAN (2019, 2020, 2021), bulletin 10180115: Customer states MIL-on with P0496 Customer states oil leak from the engine Customer states MIL-on with P0556 MIL-on P04F0 and/or P0441 Customer states oil leak from the engine Customer states MIL-on with P0111 "Customer …
- VOLKSWAGEN ATLAS (2019, 2020, 2021), bulletin 10180581: Customer states oil leak from the engine Customer states MIL-on with P0556 MIL-on P04F0 and/or P0441 Customer states oil leak from the engine Customer states MIL-on with P0111 "Customer states MIL-on with P11A1/P11A2/P11…
- VOLKSWAGEN PASSAT (2019, 2020, 2017, 2018), bulletin 10184286: Customer states MIL-on with P0556 Customer states MIL-on with P2421 Customer states MIL-on with Misfire code Customer states clutch pedal makes noise No crank, no start Customer states seat memory inoperative Customer st…
- RAM PROMASTER (2020), bulletin 10214619: Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further inves…
- DODGE DURANGO (2016, 2017), bulletin 10176589: Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further inves…
- JEEP GRAND CHEROKEE (2016, 2017), bulletin 10176589: Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further inves…
Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.