Detection Condition
WARNING: This page is about a different car, the 2003 Mazda Protege5 and 2003 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.
PCM measures fuel tank pressure (ftp a) and (ftp b) when monitoring conditions are met.
Monitoring Condition
- Atmospheric pressure is more than 20.5 in. Hg.
- Fuel remaining is 35-85 percent of total capacity.
- Intake air temperature is 14-140°F (-10-60°C).
- Engine coolant temperature is 95°F (35°C) or less when engine is first started.
- Engine coolant temperature is 158-226°F (70-108°C).
- Throttle opening angle is closed.
- Within 16 minutes of engine start.
If difference between (ftp a) and (ftp b) exceeds threshold, PCM determines EVAP system has a very small leak (0.02 inch (0.5 mm) hole equivalent). This is an intermittent monitor. MIL is illuminated when PCM detects malfunction condition in 2 consecutive drive cycles. Pending code is available if PCM detects malfunction condition during first drive cycle. Freeze frame data is available and DTC is stored in PCM memory.