Ud pressure switch rationality. Do i need to replace the solenoids? Aug 20, 2024 · The pressure switch code is more than likely related. This code means that either the switch is not responding, or the switch is activated when it’s not supposed to be on. Nov 18, 2012 · P0876 is a UD Pressure Switch Rationality fault. P0871-OD PRESSURE SWITCH RATIONALITY. SWITCH SENSE 2C PRESSURE SWITCH SENSE 4C PRESSURE SWITCH SENSE L_R_SW 2C OD UDC 4C (RFE) For a complete wiring diagram, refer to the Wiring Information . Aug 31, 2017 · Trouble Code P0876 UD Pressure Switch Rationality. p0765– ud solenoid circuit p0770– 4csolenoid circuit p0841– l/r pressure switch rationality p0845– 2c hydraulic pressure test p0846– 2c pressure switch rationality p0868– line pressure low p0869– line pressure high p0870– od hydraulic pressure test 68rfe Jun 24, 2016 · P0988 is 4C Pressure Switch Rationality, which means the 4C pressure switch was in the wrong state (open when it should be closed, or closed when it should be open). For example, this code. a suspect 04799662ab cooler return filter may cause the transmission sump filter to split at its plastic-to-metal crimp. Sep 10, 2024 · Replace the OD pressure switch if deemed faulty, reset the fault code, and test drive the vehicle to ensure proper operation. Cost to Fix P0871 Chrysler The typical repair costs for addressing a P0871 Chrysler code can vary depending on the specific cause of the issue and the labor rates at the repair facility. " So P0875 means the Dec 15, 2012 · P0876 UD Pressure switch rationality - one of the most common issue for this code is incorrect fluid/filter installation P0765 - Drive solenoid also can be caused by the same circumstances as listed above truthfully if i had gun to my head and had to make a determination on the info and work you have done . Mar 30, 2018 · One of the most common codes that appear in many Chrysler transmissions is the pressure switch rationality code. Some of the most common issues observed are: DTC P0871 (OD Pressure Switch Rationality). The pressure switches are continuously monitored for the correct states in each gear as shown. Apr 6, 2022 · The Transmission system uses three pressure switches to monitor the fluid pressure in the LR, 2/4, and OD elements. Theory of Operation. Page 411/13/2019 ©TransGo 2019 Solenoid Switch Valve Measure Here New Product Available Now! T Slip, Pressure Switch Rationality codes? ould be a worn Solenoid Switch Valve ore. P0871 Pending Od pressure switch rationality P0876 Pending UD pressure switch rationality P0882 Pending TCM power input low P0944 Stored Loss of hydraulic pump prime P0988 Pending 4C pressure switch rationalityI went back and continue checking more wiring and plugs, now it won't read the Transmission module at all. The delayed engagement and MIL condition (DTC's) may be caused by a suspect transmission cooler return filter with a part number of 04799662AB. 0 ohms? Yes • Repair the (T29) UD Pressure Switch Sense circuit for a short to ground. 4 CHECK BALL CUT OR DAMAGED Apr 7, 2006 · Jeep TSB 21-007-06 Make: Jeep Number: 21-007-06 Title: RFE Transmission Filters - Delayed Engagement And Related Transmission DTC'S Date: 4/7/2006 Models: Pressure Switch Rationality Description: The Transmission System uses five pressure switches to monitor the fluid pressure in the L/R, 2C, 4C, UD and OD clutch circuits. 1. Possible Causes p0871-od pressure switch rationality - dodge 42rle service manual. 2. Sep 7, 2024 · This code typically indicates a problem with the overdrive pressure switch in the transmission system. The 2-4 or 2C pressure switch is a component that helps regulate the hydraulic pressure within the transmission. I have read in the forum about Limp Mode but they were stuck in 3rd gear, dont know if it means anything. Checkball #2: This checkball, if not in position, will cause harsh Neutral to Drive engagements, as it bypasses the UD solenoid feed to UD clutch with full line pressure. Jan 8, 2016 · P0875 is UD Hydraulic Pressure Test, while P0876 is UD Pressure Switch Rationality. Sep 7, 2024 · How to Fix P0871 Dodge. May 3, 2024 · The valve assembly is responsible for directing oil to different areas of the unit. The pressure switches are continuously Definition UD pressure switch rationality Expanation The. It will also cause an immediate bind in fourth and fifth gear because the UD clutch can’t be disengaged. It will also cause an immediate bind in 4 th and 5 th Gear because UD clutch can’t be disengaged. For a complete wiring diagram Refer to Section 8W. Driving fine to work 35 40 minutes, drove perfect then all of a sudden dropped to 4th gear and threw the code. The 68RFE varies the transmission fluid pressure so if the pressure switch or transducer is giving faulty readings the control module may not be applying enough trans fluid pressure therefore causing the clutches to slip. Jun 1, 2011 · The codes being diagnosed in this article are: P0507: Idle speed performance higher than expected P0871: OD pressure switch rationality P0934: Line pressure sensor circuit low A 2006 Jeep Commander using a 545RFE transmission arrived at our shop from an independent muffler and general repair facility with three codes: P0507, P0871 and P0934. The P0876 is a UD Pressure Switch Rationality fault, that was likely a result of the loss of line pressure. This is pin 16 on the main transmission connector (the 23-pin connector on the solenoid module, on the top of the VB, that sticks vertically upward on the driver's side of the trans). The PCM periodically (every 10 seconds, maybe?) tests each pressure switch (that is not already closed) by momentarily turning the corresponding solenoid on, and watching for the pressure switch to close. Jul 1, 2020 · Learn what OD Pressure Switch Rationality Fault means, location and how to repair? The Powertrain Control Module (PCM) uses three pressure switches to monitor the fluid pressure in the LR, 2/4, and OD clutch circuits. Yes, these faults are often (most often) wiring problems. What can cause this. Jul 18, 2019 · Now the wire that used to carry the 2C pressure switch signal is carrying the UD signal, and vice versa. P0871 Dodge Code - OD Pressure Switch Rationality Fault Aug 21, 2024 · Code P0841 pressure switch rationality may be present. Code P0876 pressure Oct 3, 2012 · P0944 basically means you lost ALL your line pressure. Jul 3, 2012 · P0876 is actually a UD Pressure Switch Rationality fault, which means the UD pressure switch was in the wrong state (open when it should be closed, or vice versa). Dec 28, 2013 · (T29) UD PRESSURE SWITCH SENSE CIRCUIT OPEN (T29) UD PRESSURE SWITCH CIRCUIT SHORT TO GROUND (T29) UD PRESSURE SWITCH SENSE CIRCUIT SHORT TO ANOTHER CIRCUITS TRANSMISSION SOLENOID/TRS ASSEMBLY POWERTRAIN CONTROL MODULE Set Condition: This DTC is set if the UD pressure switch is in the wrong state for the current gear. So it appears you've lost your line pressure (therefore, truck won't move). Theory of Operation Due to the integration of the Powertrain and Transmission Control Modules the New Generation Control Module III Jul 6, 2012 · P0876 UD PRESSURE SWITCH RATIONALITY When Monitored Continuously with the ignition on and engine running. Now drive the vehicle and see which fault sets. This means your UD pressure switch (which indicates the presence of pressure in the UD clutch passage) was in the wrong state (either open when it should have been closed, or closed when it should have been open). Jul 1, 2020 · The pressure switches are continuously monitored for the correct states in each gear as shown below. Set Condition This DTC is set if the UD pressure switch is in the wrong state for the current gear. P0876 - UD Pressure Switch Rationality. Description: The Transmission system uses five pressure switches to monitor the fluid pressure in the L/R, 2C, 4C, UD and OD clutch circuits. If you now get the fault for the OTHER pressure switch (P0876, UD Pressure Switch Rationality, in this example), then the problem must be the wire. The pressure switches are continuously monitored for the correct states in each gear. When this switch detects an abnormal pressure reading or fails to operate within the p0765 - ud solenoid circuit p076a - dc solenoid circuit p0791 - transfer speed sensor circuit p0841 - l/r pressure switch rationality p0845 - 2-4 hydraulic Jun 4, 2011 · P0876 - UD Pressure Switch Rationality. Service Information Page 9 of 14 P0876-UD PRESSURE SWITCH RATIONALITY. 2012. In technical language, the code p0871 on dodge cummins means “overdrive fluid pressure switch rationality fault. When Monitored: May 11, 2019 · The Powertrain Control Module (PCM) uses three pressure switches to monitor the fluid pressure in the LR, 2/4, and OD clutch circuits. This code is typically associated with issues related to the transmission system of the vehicle. Nov 2, 2020 · 1. 4. They should be able to check the DTC Event Data (or have your dealer do it) - that will tell you if the switch was open or CHECK THE (T29) UD PRESSURE SWITCH SENSE CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (T29) UD Pressure Switch Sense circuit. The LR pressure switch is responsible for monitoring the pressure in the transmission in Low and Reverse gears. 13,457 Satisfied Customers. Code: P0876. 420 diameter valve. The only code I have now is Sep 6, 2024 · The P0846 diagnostic trouble code for Dodge vehicles specifically refers to a problem with the 2-4 or 2C pressure switch rationality. The trans should not still be shifting normally 1-2-3-4-5. In your case, it must be the UD switch is closed when it should be open. Just curious what can be the causes of this. Apr 1, 2012 · P0876 – UD pressure-switch rationality A cooler filter that restricts flow may have been installed ( Figure 7 ). So that is a bit confusing. Oct 3, 2011 · P0876 - UD Pressure Switch Rationality. For example, this code would be set if the UD pressure switch remained off while the transmission was in second gear. Factory trained Cummins Technician. Sep 6, 2024 · This switch is responsible for monitoring the pressure of the transmission fluid within the transmission system. This code is set due to a faulty pressure switch which is part of the transmission solenoid and pressure switch pack assembly. Then would not shift to 2nd or 3rd. Definition: UD Pressure Switch Rationality. I presume there is no huge puddle of transmission fluid underneath the truck? That is, fluid level is OK? Apr 6, 2022 · The Transmission system uses three pressure switches to monitor the fluid pressure in the LR, 2/4, and OD elements. Theory of Operation The Transmission system uses five pressure switches to monitor the fluid pressure in the L/R, 2C, 4C, UD, and OD clutch circuits. The Transmission system uses five pressure switches to monitor the fluid pressure in the L/R, 2C, 4C, UD, and OD clutch circuits. PCM would be my choice May 10, 2019 · The Transmission system uses three pressure switches to monitor the fluid pressure in the L/R, LC, and OD elements. if the transmission sump filter becomes Jun 13, 2011 · You are interested (for the P0871 OD Pressure Switch Rationality fault) in the OD pressure switch circuit. Apr 13, 2020 · P0876 means the UD pressure switch is in the wrong state (open when it should be closed, or closed when it should be open). Make certain to install a quality cooler filter by checking to see that the intake holes in the top of the filter are not restricted ( Figure 8 ). OD Pressure Switch Rationality Description: The Transmission system uses five pressure switches to monitor the fluid pressure in the L/R, 2C, 4C, UD and OD clutch circuits. Is the resistance below 5. ” When the code is described in simple terms, the code indicates the fault in the overdrive fluid pressure switch, which can either be open or closed. The delayed engagement and MIL condition (DTC's) may be caused by a suspect transmission cooler return filter with a part number of 04799662 AB . 1st to 4th. The UD pressure switch is normally closed when pressure is being fed to the UD clutch. dodgetech77. Check transmission fluid levels and quality, topping up or replacing if necessary. But that code should put you in full limp-in (4th gear only). P0876 Dodge Code Dec 22, 2013 · p0854 overdrive input switch circuit low p0868 line pressure low p0869 line pressure high p0870 od hydraulic pressure test p0871 od pressure switch rationality p0875 ud hydraulic pressure test p0876 ud pressure switch rationality p0882 tcm power input low p0883 tcm power input high p0884 power up at speed p0890 switched battery p0930 btsi Mar 7, 2023 · P0846 - 2-4 or 2C Pressure Switch Rationality P0871 - OD Pressure Switch Rationality P0876 - UD Pressure Switch Rationality P0882 (intermittently) - TCM Power Input Low P0988 - 4C Pressure Switch Rationality I replaced the solenoid pack (and fluid filter) last August. Cause: LOSS OF PRIME AND/OR TCM POWER INPUT DTCS PRESENT; LOW FLUID LEVEL Oct 30, 2014 · p0854 overdrive input switch circuit low p0868 line pressure low p0869 line pressure high p0870 od hydraulic pressure test p0871 od pressure switch rationality p0875 ud hydraulic pressure test p0876 ud pressure switch rationality p0882 tcm power input low p0883 tcm power input high p0884 power up at speed p0890 switched battery p0930 btsi P0876-UD PRESSURE SWITCH RATIONALITY. Burnt OD Clutches. When the bore is compromised, oil can leak into adjacent circuits, causing pressure switches to trigger and clutches to burn. Jan 10, 2010 · · P0765 - UD Solenoid Circuit · P0846 - 2-4 or 2C Pressure Switch Rationality · P0871 - OD Pressure Switch Rationality · P0841 - LR Pressure Switch Rationality DIAGNOSIS: Disconnect the transmission solenoid/pressure switch assembly connector and inspect the harness connector and assembly connector for any signs of moisture or corrosion. If the pressure readings from the switch are not within the expected range or are erratic, the P0876 code is triggered. Measure your solenoid switch valve and order: p/n RFE-SV420-WT for . 2nd gear starts. That is the "hydraulic pressure test. Jun 24, 2016 · P0846:2-4 or 2C Pressure Switch Rationality P0871:OD Pressure Switch Rationality Fault P0988:Transmission Fluid Pressure Sensor/Switch "E" Circuit Range/Performance P0876: UD Pressure Switch Rationality. Cause: RELATED DTCS PRESENT; NO. Inspect the OD pressure switch and wiring for any visible damage or wear. 2010 Dodge 3500 Larmie dually Sep 7, 2024 · The P0841 Chrysler diagnostic trouble code (DTC) indicates a rationality fault with the LR (Low/Reverse) pressure switch in the transmission. the delayed engagement and mil condition (dtc's) may be caused by a suspect transmission cooler return filter with a part number of 04799662ab . If the UD solenoid were leaking enough pressure into UD to seriously damage the clutch, then I would expect you to get a P0876 (UD Pressure Switch Rationality) fault, which apparently is NOT happening, so my guess would be your solenoid module is OK. If Apr 7, 2006 · Dodge TSB 21-007-06 Make: Dodge Number: 21-007-06 Title: RFE Transmission Filters - Delayed Engagement And Related Transmission DTC'S Date: 4/7/2006 Models: Aug 13, 2024 · Code P0841 pressure switch rationality may be present. Low lutch Switch Valve Install ball here only if plate has this hole. Cause: Jul 3, 2012 · P0876 is actually a UD Pressure Switch Rationality fault, which means the UD pressure switch was in the wrong state (open when it should be closed, or vice versa). Cleared the codes and took it for a drive to heat the fluid up so I could get a better read on the fluid levels, seemed to drive fine on a mix of mid to low speed Jun 1, 2011 · The codes being diagnosed in this article are: P0507: Idle speed performance higher than expected P0871: OD pressure switch rationality P0934: Line pressure sensor circuit low A 2006 Jeep Commander using a 545RFE transmission arrived at our shop from an independent muffler and general repair facility with three codes: P0507, P0871 and P0934. Also, if the UD clutch is applied in Park or Neutral, the trans will effectively be in 1st gear (so it will drive forward in Neutral). Apr 25, 2019 · P0876: UD Pressure Switch Rationality The MAP sensor one pops up a bit, I've replaced it and it still seems to surface about once a month but I clear it and happy days afterwards. The switch sends signals to the vehicle's computer system, informing it of the pressure levels. When Monitored: Jun 2, 2022 · P0871 OD Pressure Switch Rationality P0876 UD Pressure Switch Rationality Click to expand Sorry but no help but I am also a mrfeeney. Cause: RELATED DTCS PRESENT; LOSS OF 12 VOLT FEED (T48) 4C PRESSURE SIGNAL P0841-LR PRESSURE SWITCH RATIONALITY. The 2/4 pressure switch monitors the fluid pressure to the 2/4 clutch to confirm proper operation of the 2/4 solenoid. The Transmission Control system uses three pressure switches to monitor the fluid pressure in the L/R, 2/4, and OD elements. The LC pressure switch monitors the fluid pressure to the LC clutch to confirm proper operation of the LC solenoid. It is located atop the valve body in the transmission. p0876 - ud pressure switch rationality. SYSTEM WIRING DIAGRAMS for Sebring 4D Sedan. p0765-ud solenoid circuit p0841-lr pressure switch rationality p0845-2/4 hydraulic pressure test Oct 22, 2015 · P0876 - UD Pressure Switch Rationality. P0846 Dodge Code - 2-4 or 2C Pressure Switch Rationality Oct 9, 2018 · P0876 is UD Pressure Switch Rationality, which indicates that the UD pressure switch was in the wrong state (either open when it should be closed, or closed when it should be open). The overdrive pressure switch plays a crucial role in controlling the transmission's hydraulic pressure, which in turn affects gear shifting and overall performance. Diagnose the issue using a diagnostic scanner to confirm the P0871 code and identify the specific cause. Likely related to your P0770 fault. P0871 Code - OD Pressure Switch Rationality Fault LR Pressure Switch Rationality Description: The Transmission system uses five pressure switches to monitor the fluid pressure in the L/R, 2C, 4C, UD and OD clutch circuits. Mar 14, 2012 · P0876 - UD Pressure Switch Rationality. This Diagnostic Trouble Code (DTC) is set if the 2/4 pressure switch is open or closed at the wrong time in a given gear. P0122-TPS/APP CIRCUIT LOW For a complete wiring diagram Refer to Section 8W . qqyp stgbp glosw vlzbxmk rmxin wqef idiucss pxhpo fifhim koyp