P003B

DTC P003B, sometimes indicated as P003B00 is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing turbocharger/supercharger boost control "b" position exceeded learning limit.

The PCM has detected that the turbocharger or supercharger boost control "B" position has been exceeded more than the number of times the PCM has allowed. This is a Learning Limit fault.
Possible causes include a boost leak, a faulty boost controller, or a faulty PCM.
If the fault is intermittent, clear the DTC and monitor the system. If the fault persists, repair the cause.

• P003B: Turbocharger/Supercharger Boost Control B Position Exceeded Learning Limit
• P003B: Turbocharger/Supercharger Boost Control "B" Position Exceeded Learning Limit
• P003B: Turbocharger (TC)/supercharger (SC) boost pressure control B – learning limit exceeded
• P003B 00: Turbocharger (TC)/supercharger (SC) boost pressure control B - learning limit exceeded