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C1B90 fault code: what it means

C1B90: BYD: power amplifier circuit short (chassis system).

Chassis (brakes, steering, suspension) · Costly if missed

Usual causes, most likely first

  1. wiring short
  2. module fault

C1B90 by make

BYD

BYD: power amplifier circuit short (chassis system).

Usual causes: wiring short; module fault

Not sure what C1B90 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.