LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 107 (Electronically Controlled Brake System (Hybrid) - Diagnostic Codes (1 Of 5)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C1202: Master Reservoir Level Malfunction [06/2018 - ] >> Description

DTC C1202: Master Reservoir Level Malfunction [06/2018 - ]: Description

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
DTC No. Detection Item INF Code DTC Detection Condition Trouble Area MIL Note
C1202 Master Reservoir Level Malfunction 1126 Either of the following is detected:
  1. The brake fluid level warning switch signal circuit is open for a certain period of time.
  2. The reservoir level is low for a certain period of time.
  • Open or short in brake fluid level warning switch (brake booster with master cylinder assembly)
  • Brake fluid leaks
  • Open or short in wire harness
  • Low brake fluid
  • Skid control ECU (brake booster with master cylinder assembly)
Comes on
  • INF Code 1126: SAE Code C1202
  • Electronically controlled brake system DTC
HINT: DTC C1202 (INF code 1126) is cleared when the conditions return to normal.