Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DB5 - Continuous Memory Code 337: Verify Condition
1994 Ford Aerostar AWD V6-245 4.0LSECTION DB5 - Continuous Memory Code 337: Verify Condition
Continuous Memory Diagnostic Trouble Code (DTC) 337 indicates that sometime in the last 80 warm-up cycles, the EGR Temperature (EGRT) sensor signal was greater than the Self-Test maximum.
Possible Causes:
- Damaged EGRT sensor.
- Open harness circuit.
- Damaged Powertrain Control Module (PCM).
- Key "OFF".
- Clear continuous memory. Clearing Diagnostic Trouble Codes
- Start engine and run for at least two minutes.
- Turn engine "OFF" and rerun Key On Engine Off (KOEO) Self-Test.
- Is Continuous Memory DTC 337 still present?
Yes -- Go to DB6. DB6 - Check EGRT Circuit For Shorts to Power
No -- Go to DB90. DB90 - Check EEC-IV Vehicle Harness
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.