Error code ECU 002659.15 is triggered when the ECU detects an EGR flow rate that is slightly higher than expected, even when the EGR valve is supposed to be closed. This unexpected flow can indicate a malfunction such as a sticking or leaking EGR valve.

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Error code ECU 002659.14 is activated when there is a significant discrepancy between the actual EGR flow signal and the flow calculated based on temperature sensors. This inconsistency can indicate a malfunction within the EGR system that affects its ability to properly regulate exhaust gases.

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This error code indicates that the EGR flow signal falls below the lower limit, suggesting a short to ground. Such a fault may result in the ECU receiving falsely low EGR flow readings, which can disrupt the proper functioning of the vehicle’s emissions system.

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Error code ECU 002659.03 is triggered when the EGR (Exhaust Gas Recirculation) flow signal exceeds the upper limit of its normal range, which suggests a short to 12 volts. This electrical fault can cause the ECU to receive inaccurately high EGR flow readings, potentially affecting the engine’s emission control and efficiency.

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Error code ECU 002659.02 is triggered when a mismatch between the EGR flow and temperature is detected by the ECU. This discrepancy can indicate issues with the EGR system’s ability to regulate exhaust gas recirculation effectively.

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This diagnostic trouble code indicates that the NOx-based EGR flow correction factor has reached a level significantly low enough to suggest that tailpipe NOx emissions are out of compliance with environmental regulations. This situation points to an underperforming EGR system, potentially leading to higher NOx emissions.

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Error code ECU 002630.16 is set when the exhaust gas recirculation (EGR) fresh air temperature, specifically at the charge air cooler outlet, is detected to be moderately above the specified threshold. This condition may affect the efficiency of the EGR system, which is critical for controlling emissions and maintaining engine performance.

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Error code ECU 002630.15 is set when the ECU detects the EGR fresh air temperature slightly above the specified threshold. This condition might indicate that the charge air cooler outlet temperature is slightly higher than expected, potentially reducing the effectiveness of the EGR system.

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This error code, ECU 002630.04, occurs when the input voltage at the EGR fresh air temperature sensor falls below the minimum specified limit, indicative of a short to ground. This malfunction can lead to inaccurate temperature readings impacting the EGR system’s functionality.

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Error code ECU 002630.03 is triggered when the input voltage to the exhaust gas recirculation (EGR) fresh air temperature sensor exceeds the maximum specified limit, indicating a short to 12 volts. This error can result in erroneous temperature readings that may affect the EGR system’s performance.

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Error code ECU 002630.00 indicates that the exhaust gas recirculation (EGR) fresh air temperature, or charge air cooler outlet temperature, is extremely high, exceeding the specified temperature range. This condition can lead to inefficient EGR operation and potential engine overheating.

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