Why do I get code 385-3 on my Cat?
Why do I get code 385-3 on my Cat?
Shorted 1 and 3 and got codes “212-4” (sensor supply voltage low) and “385-3”. also jumped 1 and 2 and the code stayed at “385-3”. were on sensor Number 3 (from Cat) so the sensor is not the problem. Is it possible the jumper harness we bought from cat is wired wrong?
What does code 385-3 Iva pressure mean?
Replaced sensor again, same issue, was good for a couple days and came back with code 385-3 active. we replaced the jumper harness from the sensor to the engine harness (right behind AC compressor) and still have the same issue.
What’s the difference between FMI code 03 and 04?
The FMI code 04 is similar to the FMI code 03. However, the FMI code 04 indicates that the voltage values are below acceptable values. The appearance of the FMI 04 code is most often associated with a malfunction of the signal circuits. The FMI code 04 is similar to the FMI 06 code and is sometimes used instead.
Is there a problem with a 385-3 ECM?
If you have replace the sensor and the harness that connect to the sensor, you may have a faulty ECM. It’s rare but I have seen it two or three times over the years. Basically, a 385-3 is an open circuit. Most often the problem is the sensor. Since yours has been replaced several times. I would say the sensor is not the problem.
Shorted 1 and 3 and got codes “212-4” (sensor supply voltage low) and “385-3”. also jumped 1 and 2 and the code stayed at “385-3”. were on sensor Number 3 (from Cat) so the sensor is not the problem. Is it possible the jumper harness we bought from cat is wired wrong?
Replaced sensor again, same issue, was good for a couple days and came back with code 385-3 active. we replaced the jumper harness from the sensor to the engine harness (right behind AC compressor) and still have the same issue.
Where is the 385-3 intake actuation pressure sensor?
385-3 is intake actuation pressure sensor – low voltage. That sensor is on the right side front of the engine right above the T-stat housing. The sensors are prone to failure, but you may also have a wiring issue.
If you have replace the sensor and the harness that connect to the sensor, you may have a faulty ECM. It’s rare but I have seen it two or three times over the years. Basically, a 385-3 is an open circuit. Most often the problem is the sensor. Since yours has been replaced several times. I would say the sensor is not the problem.
