| | Explanation | |-----------|-----------------| | Contaminated DEF | Water, oil, coolant, or incorrect fluid (e.g., diesel, windshield washer fluid) introduced into DEF tank. | | Poor Quality DEF | Non-certified DEF with urea concentration below 30% or above 35%. | | DEF Quality Sensor Failure | The sensor inside the DEF tank provides incorrect readings due to electrical or mechanical damage. | | Degraded DEF | DEF stored beyond 12 months or exposed to high temperatures (>86°F / 30°C), causing ammonia decomposition. | | Wiring or Connector Issues | Corrosion, loose pins, or damaged harness between DEF quality sensor and ECU. | | Software Malfunction | Outdated ECU software causing false plausibility checks. | | Cross-Contamination | Residual water or cleaning agents left in DEF tank after service. |
Contaminants or "big stuff" in the fuel tank can block the inlet before fuel even reaches the filters. High-Pressure System Issues: Injector Wear/Leaking: New Holland 3297 Error Code
While a failed sensor is the most common cause, it is not the only cause. Before replacing parts, consider these possibilities: | | Degraded DEF | DEF stored beyond
Code 3297 almost always points to a failure in one of two specific components: | | Cross-Contamination | Residual water or cleaning
On T8000 and higher series tractors, the IMU processes hitch and remote valve commands. An internal power supply failure inside the IMU will cause it to stop broadcasting messages on the CAN bus, triggering code 3297.