What Does P0261 Mean? This trouble code indicates that the powertrain control module has detected a lower reference voltage coming from the number 1 cylinder’s fuel injector than what was specified by the vehicle manufacturer. engine code P0261P0261 fixobd P0261dtc P0261obd code P0261obd2 P0261P0261 car codediagnostic code P0261car code P0261check engine code P0261fehlercode P0261P0261 fiatcodigo P0261codigo falla P0261P0261 kody błędówcodigo de falla P0261 What are the common causes of P0261 ? Most often, the cause of the problem can be traced to the #1 cylinder fuel injector itself, or in the electrical circuitry associated with it. A dirty or plugged fuel injector, or a faulty fuel injector, are common causes, although somewhat surprisingly, an electrical malfunction of one type or another is more likely to be the source of the problem. Electrical malfunctions can consist of either an open circuit or a coil-to-coil short in the fuel injector harness, a loose or corroded connector to the fuel injector control module (FICM), or a fault in the FICM itself. A faulty oxygen sensor is another, although somewhat remote, possibility as would be a fault in the PCM. The wiring harness to the PCM is rarely a source of the problem, which is a good thing since this harness can be hard to gain access to on most vehicles. How do you troubleshoot P0261 ? The engine system, in conjuction with the engine control module (ECM)/powertrain control module (PCM), activates the P0261 code solenoid valve to control oil pressure to the engine mechanism that is installed in the valve system to switch valve timing between Low and High.If the engine solenoid valve has an open or short circuit, a DTC is stored. Searches related to P0261 - Cylinder 1 Injector Circuit Low injector circuit low 6.0 powerstroke p0261 6.0 powerstroke p0261 p0264 p0267 p0270 what does injector circuit low mean po264 p0261 harley circuit low meaning p0261 7.3 powerstroke