Got my F30 320d remapped 2 weeks ago and now the engine light came on. Scanner shows code 2C5A - boost pressure too low. Is this related to the remap or a separate issue?
The car drives fine, no loss of power. But the light is annoying. Should I contact the tuner or check something else first?
First step: read the fault codes with ISTA or any OBD scanner. The most common codes after a remap are boost-related (overboost or underboost) or lambda sensor codes. If its a boost code, the tune might be too aggressive for your hardware. If its a lambda code, the O2 sensors might need recalibration in the map. Contact your tuner with the exact fault codes - a good tuner will adjust the map for free.
What engine and what tuner? Some cheap tuners just increase boost without adjusting the fault code thresholds, which triggers the engine light. A proper tune should never throw codes under normal driving conditions. If your tuner cant fix it, consider switching to a reputable tuner.
Want to join the conversation? Sign in or create an account — it takes about ten seconds.
Boost leak symptoms on N55 - how to diagnose
Car wont start after ECU flash - bricked?
Water pump failure warning signs - N20/N26
VANOS fault codes on N52 - 2A82 and 2A87
BMW xDrive transfer case problems — symptoms, diagnosis, and prevention
Transmission fault after TCU tune - ZF 8HP
