DTC Code P0260 – What does this code mean?

<ul> <li><b>Malfunction Indicator Lamp (MIL) Illumination</b>: The MIL or check engine light will illuminate on the dashboard. This is a direct indication that the vehicle's onboard diagnostics system has detected an issue with the injection pump fuel metering control.</li> <li><b>Decrease in Fuel Economy</b>: A noticeable drop in fuel efficiency may occur. This can be linked to improper fuel metering, which affects the engine's performance and fuel consumption.</li> </ul>

<ul><li>Open in the signal circuit to the FRP sensor can disrupt the communication, leading to intermittent issues.</li><li>Short to voltage in the signal circuit to the FRP sensor may cause erratic readings and improper fuel metering.</li><li>Short to ground in the signal circuit to the FRP sensor can result in incorrect sensor signals being sent to the PCM.</li><li>Open in power or ground at the FRP sensor can lead to sensor malfunction and intermittent control issues.</li><li>Failed FRP Sensor is a common cause and can directly affect the fuel metering control.</li><li>Failed PCM is less likely but can still cause intermittent control issues if it occurs.</li></ul>

<ul> <li><b>Check Technical Service Bulletins (TSB)</b>: Verify if there are any TSBs related to DTC P0260 for your vehicle. This can provide known fixes and save diagnostic time.</li> <li><b>Locate and Inspect FRP Sensor</b>: Find the Fuel Rail Pressure (FRP) sensor, typically mounted on the injection pump. Inspect the connector and wiring for damage, such as scraping, bare wires, or burn spots.</li> <li><b>Inspect Connector Terminals</b>: Disconnect the connector and inspect the terminals for signs of burning or corrosion. Clean terminals with electrical contact cleaner and a plastic bristle brush, then apply electrical grease.</li> <li><b>Clear DTC and Retest</b>: Use a scan tool to clear the DTC from memory. If the code does not return, the issue was likely with the connections.</li> <li><b>Test FRP Sensor Power and Ground</b>: With the key off, disconnect the FRP sensor connector. Use a digital voltmeter to check for 12V or 5V at the power terminal and ground terminal. If voltage is incorrect, repair the wiring or replace the PCM.</li> <li><b>Test FRP Sensor Signal Wire</b>: Move the voltmeter red lead to the signal wire terminal. The voltmeter should read 5V. If not, repair the signal wire or replace the PCM.</li> <li><b>Replace FRP Sensor or Fuel Quantity Actuator</b>: If all tests pass and the P0260 code persists, replace the FRP sensor or Fuel Quantity Actuator. A failed PCM cannot be ruled out until the sensor/actuator is replaced.</li></ul>

<p>The DTC code P0260 indicates an issue with the Injection Pump Fuel Metering Control B Intermittent. The severity depends on the nature of the failure:</p><ul><li><b>Mechanical Failure:</b> This is severe and can lead to significant engine performance issues. Immediate inspection and repair are necessary to prevent further damage.</li><li><b>Electrical Failure:</b> This is less severe as the PCM can compensate. However, it should still be addressed promptly to ensure optimal engine performance and fuel efficiency.</li></ul>