Brake warning light on after a cold start (TSB 03-078)
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What causes "Brake warning light on after a cold start (TSB 03-078)" on the Honda Civic EK (1996-2000), and how is it fixed?
The master cylinder reservoir filter keeps the cap from venting, so the level read by the float changes. Fix: Replace the reservoir filter named in the bulletin, after checking fluid level and pads.
Symptoms
The brake system indicator comes on after a cold start and goes off after a few minutes.
Cause
The master cylinder reservoir filter keeps the cap from venting, so the level read by the float changes.
Fix (summary)
Replace the reservoir filter named in the bulletin, after checking fluid level and pads.
Related build entries
Other EK problems
- Recall 96V-106: brake booster check valve can stick (1996)
- Recall 97V-193: passenger airbag assembled wrong (1997-98)
- Recall 99E-015: accessory floor mat can catch the accelerator (1996-98)
- Recall 02V-120: ignition switch contacts can wear (1998-2000)
- Recalls 20V-026 / 20V-027: driver airbag inflator (1996-2000)
- Recalls 01V-380 / 02V-051: faulty rear seat belt buckles (2000)
More for this car
- All Honda Civic EK (1996-2000) fitment answers · EK common problems
- Newsletter archive: past issues with every new and corrected entry
Sources
- Honda TSB 03-078: Brake system indicator comes on, then goes off (1996-2000 Civic and others) — American Honda (service bulletin) via Operation CHARM (mfr spec; read 2026-10-26; full page read)
Summaries are in our own words. Not repair instructions; consult the factory service manual.
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