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Re: What does the code p1870/ transmission slipping...
It usually means the torque converter clutch isn't working. This is commonly caused from low fluid pressure to the converter clutch from a worn valve body in the transmission.
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The diagnostic trouble code (DTC) description for P1870 is, "Transmission Component Slipping." A transmission that is slipping will usually need to be overhauled or replaced to resolve, however there are some checks that can be done first. The easiest check is transmission fluid level and condition. If the level is low due to a leak, the leak may be able to repaired and fluid level corrected to restore normal operation. If the fluid condition is old or contaminated, replacing the transmission fluid and filter could resolve the issue. It's important to note that both of these conditions could have already resulted in transmission damage, but due to the high cost of transmission replacement sometimes they're not a bad idea to try. The troubleshooting procedure for P1870 also indicates that a malfunctioning range switch or incorrect engine speed could set the code. To check for these conditions an on-board diagnostic (OBDII) scanner with live data streaming capabilities will need to be used. Once attached to the vehicle, range switch selected gear position should be observed while manually moving the gear shifter through the positions to make sure it's reading correctly. Also, the crankshaft position sensor signal should be viewed via the RPM parameter ID (PID) to ensure accuracy. You can read more here: https://www.yourmechanic.com/article/is-it-safe-to-drive-with-a-slipping-transmission
P1870 ! not P01870
DTC P1870 Transmission Component Slipping (Buick Built Before 6/17/97)
DTC P1870 Transmission Component Slipping (All Other Applications)
Circuit Description
The Powertrain Control Module (PCM) monitors the Torque Converter Clutch (TCC) slip by calculating the difference between the engine speed and the transmission output shaft speed.
If the PCM detects an excessive amount of slip when the TCC is engaged, then DTC P1870 sets. DTC P1870 is a type B DTC.
www.gmforum.com > ... > 1992-199 Jun 9, 2005 - Location: Bloomington-Normal, IL 1997 SE ... Default Code P1870...What does it mean??? I got a CE light the other day, and this is the code that was read word for word: P1870 ... No TCC solenoid electrical DTC P0740 ... Code P1870 & Speedometer error, Hi_tork, 1992-1999, 4, 10-16-2011 04:08 PM.
CODE P1870 - TRANSAXLE COMPONENT SLIPPING POSSIBLE CAUSE LOW TRANSMISSION FLUID LEVEL OR CONTAMINATED TRANSMISSION FLUID OR TRANSMISSION HAVE INTERNAL DAMAGE OR MECHANICAL FAULT.
I also have a 99 Lumina and code p1870 means: Transmission Component Slipping/ Transmission Mechanical Transfer Case 4x4 Switch Circuit Failure Now we both know theres no 4x4 in these cars. So I'm going to try to find out about this and try to figure out why the PCM showed this code. When I do, I'll put it on my profile.
The code description for P1870 is "transmission component slipping" and usually means that the computer has detected a difference between what the input speed is and output shaft speed should be under certain conditions and tagged it as a slipping component. Usually it means that a clutch pack [usually direct drive clutch] or band isn't holding under a load and has started to slip. Sometimes the slippage can be observed on a scan tool during a road test but if the slippage is bad enough it may be noticable just driving it. Low transmission fluid level could cause this problem so make sure you check it before going any further. If it turns out that there is interal slippage then the transmission would have to come out and be repaired.
no but a low fluid level could cause a slip telling the ecm there is a slip top it off then clear the code and drive a few miles if this code comes back i would say there is internal damage to the tranny
P1870= transmission component slipping..detected a slip there are a number of reasons this may occur..were there any other codes or just that one...If there were a bunch of other codes it may have fooled the computer into thinking there were components slipping ....I would clear the code and see if it reoccurs..While code is present you may find it shifts harder ..and possibly will not go into 4th gear or overdrive..good luck
Here's was the code means: P1870 Transmission Component Slipping
A code that indicates a problem with your tranmission. Ususally causes a hard shift from 1st to second gear. Need to have a transmission expert look at the vehicle. Most cases the torque converter is the main problem. But, sometimes the transmission may need rebuilt if damage has occurred.
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