Hello, with so many codes like this, I would start by checking the 5v Reference and the Grounds to Fuel rail pressure sensor and to the Throttle position sensor on the throttle body, The fuel rail pressure/temp sensor shares a 5v ref with the EGR control and also probably shares it with the TPS internally to the ECM and the Grounds are going to be shared internally as well on the Sig Return wire, I would think the forced idle for the throttle actuator and limited rpm are a result of the TPS codes, Ill post some wiring diagrams for you, but with the key On, you should read 5 volts on at least 1 wire for the TPS, EGR, and Fuel Rail pressure sensor. I'll have to look over the diagrams on the OEM side to be sure these colors are correct,
but something else to keep in mind is if one of these sensors is shorted to ground it can affect the other sensors that use the same 5v ref feed. So, if you unplug the sensor to check a 5v ref and it's the faulty sensor, it will appear normal because it's no longer shorted to ground unplugged. So back probing these sensors with a pin is best, then if you see a missing 5v ref you can then unplug other sensors to see if it returns.
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Sunday, December 15th, 2024 AT 11:57 AM