This is not the first occurrence of a P0088 error code, however it is just the second time it has been seen on a 3.3L engine. It is possible that the issue is just a malfunctioning fuel rail pressure sensor, which is providing a greater pressure reading than what is expected by the engine control unit (ECU). The regulator may also have responsibility,
Prioritize addressing the P0088 code since it is likely the root cause of the P030x misfire codes. Upon detecting the criteria for a P0088, the system activates 'limp mode'. Provides sufficient power to navigate to a service location or at the very least exit a highway, but lacks capabilities beyond that.
Uncertainty remains over the reliability of the sensor and its potential role as the cause of the issue. What is certain is that the ECU is displeased with the information being reported by the pressure sensor. Perhaps you could request @aquanaut20 to send you a MaxiCOM PRO device. The price exceeds $500. Not a ubiquitous item found in every individual's garage.
Regrettably, the fuel rail pressure sensor is located under the intake manifold, making it impossible to physically reach. Therefore, it is more feasible to seek assistance from someone equipped with a scanner capable of monitoring the real-time output and determining the voltage's acceptability. The device functions using a 5V power supply, and the voltage decreases when there is little fuel demand, while it increases when there is high fuel demand. You may manipulate the gas pedal to see whether everything appear to be functioning correctly.
I would recommend beginning with that step, since the sensors in question are located under the intake manifold. In the event of any questionable wiring or a faulty sensor, it will be necessary to remove the intake manifold in order to access and address the issue. If necessary, you should be able to get a replacement for somewhat around $100.
Subsequently, the reliability of pressure control becomes questionable, leading to increasingly complex and costly situations. Commence with the sensors and hope for a favorable outcome. Fortunately, we have never seen a P0088 issue that may be attributed to a faulty ECU.
