Powertrain
generic / SAE
P2548
Torque Management Request Input Signal B
General electrical fault on the second torque-management request input B. Used when more than one module needs to request torque adjustments — typically TCM on input A and ABS/ESC on input B, or chassis vs powertrain. With B invalid, only the A-side request is honoured.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 48
Possible causes
- Open or shorted wire / invalid CAN message high
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 120–800 €
- Estimated time: 0.5–3 h
- Component: torque management input b
- MIL / check engine light
Sources
References
sae:J2012