What is CAT Code E1309-2 & How to Solve It?

What is CAT Code E1309-2:

CAT Code E1309-2 refers to a low DEF pressure condition, meaning the system cannot maintain the pressure needed for proper dosing.

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Why This Happens

• Weak or failing DEF pump.
• Blocked DEF filter or frozen lines.
• Leaking DEF fittings or air intrusion.

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How to Fix It

1. Check pump operation using diagnostics.
2. Replace clogged filters and inspect for leaks.
3. Warm system and verify pressure builds under command.
4. Replace the DEF pump if it fails to build pressure.

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How to Avoid It Before It Happens

1. Replace DEF filters on schedule.
2. Use clean, sealed DEF and monitor tank contamination.
3. Leverage Clue’s Asset Tracking to monitor DEF system performance, ensuring pressure levels are maintained and issues are identified early.