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DTC C1202/68: Master Reservoir Level Malfunction [08/2013 - ]: Description

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

When a fluid level drop in the brake master cylinder reservoir assembly is detected, a signal is sent to the skid control ECU (brake booster with master cylinder assembly).

If the DTC for the fluid level drop is memorized, the warning will be canceled and the DTC will not be stored when the fluid level returns to normal.

DTC No. INF Code DTC Detection Condition Trouble Area
C1202/68 371 An open is detected in the switch signal circuit for 2 seconds or more.
  • Brake fluid level warning switch (Brake master cylinder reservoir assembly) internal open circuit
  • Open in wire harness
  • Skid control ECU (Brake booster with master cylinder assembly)
- The reservoir level remains low.
  • Low brake fluid level
  • Brake fluid leaks
  • Brake fluid level warning switch (Brake master cylinder reservoir assembly) internal short circuit
  • Short in wire harness
  • Brake disc rotor excessive wear
  • Skid control ECU (Brake booster with master cylinder assembly)