Diagnostic Aids
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- The system is designed for use of regular unleaded fuel to any ethanol concentration up to 85 percent (E85).
- When the ambient temperature drops below 14°F (-10°C), a winter blend of 70 percent (E70), or less is recommended for cold weather starting.
- The use of methanol fuels may set this DTC.
- Use of methanol fuel or high concentration of ethanol may cause DTCs P0169 and P0179 to set.
- Other contamination such as water and salts may cause this DTC to set.
The table below shows the maximum thresholds of a given ethanol content (percentage) versus the ambient temperature at which a DTC P0169 will set. See ETHANOL CONTENT VS. AMBIENT TEMPERATURE .
ETHANOL CONTENT VS. AMBIENT TEMPERATURE
| Temperature | Ethanol Content | Frequency Hz |
|---|---|---|
| -40°F (-40°C) And Colder | 55% | 105 |
| From -22-14°F (-30 To -10°C) | 76% | 126 |
| 23°F (-5°C) | 81% | 131 |
| 32°F (0°C) And Warmer | 88% | 138 |