P2B80Turbocharger/Supercharger Boost Control Module B Calibration Not Learned/Programmed
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2B80 is the counterpart of P2B7F for the second boost control module, which only exists where two chargers or two separately driven actuators each carry their own electronics. It is set when module B has no valid calibration or its learn step was never completed. On twin-charger engines a frequent trap is fitting modules or chargers on the wrong side: Melett points out that REA-style actuator calibration belongs to one specific turbocharger and cannot be moved, and Honeywell patent US7689376B2 shows calibration recorded per unit. CARB 13 CCR 1968.2 ties such reprogrammable modules to CAL ID reporting. No manufacturer documents P2B80 publicly. If both codes appear together, a programming or wiring issue in the engine computer is more likely.
- What you may notice
- Warning lamp after work on the second charger
- Reduced power because boost on one side is limited
- Likely causes
- LikelyModule B or its charger replaced without programming or learn routine
- PossibleModules or chargers fitted on the wrong side
- RareProgramming session aborted
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.