P2B80 code meaning
Turbocharger/Supercharger Boost Control Module B Calibration Not Learned/Programmed
Powertrain system Generic code P2Bxx codes Check engine light
What P2B80 means
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.
P2B80 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 1.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P2B80
- Warning lamp after work on the second charger
- Reduced power because boost on one side is limited
Common causes of P2B80
- Most likelyModule B or its charger replaced without programming or learn routine
- PossibleModules or chargers fitted on the wrong side
- Less likelyProgramming session aborted
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Boost control module bECM
What each part of P2B80 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| B | Area: hybrid propulsion. |
| 80 | The exact fault in that area. |
What to do next
- Note P2B80 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2B80
What does P2B80 mean?
P2B80 means "Turbocharger/Supercharger Boost Control Module B Calibration Not Learned/Programmed". 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 a generic code, so it means the same on every make.
Is it safe to drive with P2B80?
Drive gently and only to a workshop. With P2B80 the car can go into limp mode (reduced power) to protect itself.
Will P2B80 fail an emissions test?
Yes, it can. P2B80 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2B80 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 1.5 hours of work. This is a job for a workshop.
Will P2B80 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.