What does a transmission manifold pressure switch do?
What does a transmission manifold pressure switch do?
The transmission oil pressure switch is unique in that its sole purpose is to collect data about the pressure found inside the transmission case, which impacts the timing and operation of shifting a vehicle to a higher or lower gear if needed.
What happens when the transmission oil pressure switch fails?
The symptom of the transmission not shifting prevents the fluid from getting too hot. If the switch has failed completely for the pump, the engine may not start to prevent dry pump rotations. This helps prevent premature failure of the oil pump. The engine light codes associated with the transmission oil pressure switch failure are:
What is the pressure switch manifold for a 4L60E?
We recommend the AC Delco 24215111 pressure switch manifold for the 4L60E and 4L65E transmissions. Unlike many parts that have come and gone in the 4L60E’s internals, this part should work for all transmissions from 1993 on up to 2008. It never hurts to check the compatibility, but you should be fine.
Where are the contacts on a transmission oil pressure switch?
The transmission oil pressure switch has contacts within its housing. Inside there is a spring to keep the contacts bridge away from the positive and ground contacts. On the other side of the spring is a diaphragm.
What is the code for transmission fluid pressure?
The P0871 code identifies a problem with the pressure of the fluid inside of the transmission. The P0871 code is often associated with the P0867, P0868, P0869, P0870, P0872, P0873, P0874, P0875, P0876, P0877, P0878, and P0879 codes. P0871 is the OBD-II generic code for a fault involving the pressure of the fluid inside of the transmission.
How do you replace a transmission oil pressure switch?
Step 2: Grab a creeper, flashlight, and tools for the job. Slide under the vehicle and locate the transmission oil pressure switch. Step 3: Remove the harness from the switch. If the harness has brackets securing it to the transmission, you may have to remove the brackets to get the harness out of the way from the switch mounting hardware.
We recommend the AC Delco 24215111 pressure switch manifold for the 4L60E and 4L65E transmissions. Unlike many parts that have come and gone in the 4L60E’s internals, this part should work for all transmissions from 1993 on up to 2008. It never hurts to check the compatibility, but you should be fine.
What happens when the oil pressure switch fails?
A transmission may not shift when the oil pressure switch has failed. The symptom of the transmission not shifting prevents the fluid from getting too hot. If the switch has failed completely for the pump, the engine may not start to prevent dry pump rotations.
What happens if the transmission oil pressure sensor is damaged?
The transmission oil pressure sensor’s primary function is to relay information to the ECM that regulates control of the transmission. However, if the switch is damaged or not sending information correctly to the ECM, the transmission may default into “limp” mode.
