Question about 1997 Buick Century

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HI, MY CAR RUNS PERFECT, TRANSMISSION VERY SMOOTH, BUT TODAY THE CHECK ENGINE LIGHT IS ON, I PUT SCANNER AND IT SAYS: CODE P1870 COMPONENT TRANSMISSION SLIPPING. BUT RUNS PERFECT !, 125000 MILES BUICK CENTURY 97, V6 3.1L. ANY IDEAS?? THANKS....

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Check atf fluid.

Posted on May 10, 2010

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1997 buick lesabre code po1870


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.

Feb 18, 2016 | Buick Cars & Trucks

1 Answer

I have a 2000 Firebird Formula LS1 engine, automatic transmission. The error code I get is P1850 or P1870


well p1870 comes up as transmission component slipping i dont have p1850 in my manual but suspect it names the part problem.....

Mar 23, 2011 | Chevrolet Camaro Cars & Trucks

1 Answer

My 99 jimmy service engine light came on. The computer says component in transmission slipping. It shifts hard from 1st to2nd after the tranny warms up. What causes this


Hi, I am assuming the code is a p1870, this code is for an internal slip condition. Check the trans fluid, It should be full, and clean. If it smells burnt, there is a good chance there are burnt clutches, or a burnt band in the trans.From experience, I think this is something you should have checked at a trans shop with a scanner. The trans is probably in need of an overhaul. Good luck...

Sep 24, 2010 | 1999 GMC Jimmy

1 Answer

Check engine light on code p1870 what to do light is on steady


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.

Aug 15, 2010 | 1999 Chevrolet Lumina

1 Answer

Code p 1870 comes up at emissions need help getting it off. Truck runs fine


Diagnostic trouble code P1870 (Transmission Component Slippage) is a General Motors-specific code whose set parameters are determined by transmission type and engine size. The PCM monitors and compares engine speed to vehicle speed after the converter clutch has been commanded ON in either high gear or Overdrive. Should the expected rpm ratio exceed predetermined parameters, DTC 1870 sets. And upon doing so, the PCM elevates the transmission main line pressure and stops converter clutch apply.

Jun 16, 2010 | 1999 Chevrolet Silverado 1500

3 Answers

P1870 code what does it mean


This GM service bulliten might apply to your vehicle:

TSB # 01-07-30-023A
Harsh 1-2 Upshift, SES, MIL, or CEL Illuminated, DTC P1870 Set (Replace Valve Body)
1996 Buick Roadmaster
1996 Cadillac Fleetwood
1996-2000 S10 Blazer
1999-2000 Cadillac Escalade
1996-2000 Chevrolet Camaro, Corvette
1996-2000 Pontiac Firebird
1996-2000 Chevrolet and GMC Light Duty Truck Models
1996-2000 Oldsmobile Bravada
with 4L60-E Automatic Transmission (RPO M30)
Built Prior to January 15, 1999 (Julian Date 9015)
This bulletin is being revised to update the Parts Information

Please discard Corporate Bulletin Number 01-07-30-023 (Section 07 -- Transmission/Transaxle).
Condition
Some customers may comment on a harsh 1-2 upshift and the Check Engine Light or Service Engine Soon indicator is illuminated.
Diagnosis
Typically, these vehicles will have been driven more than 32,000 km (20,000 mi) before this condition occurs.
The scan tool may show a DTC P1870 set as a history code.
A harsh 1-2 shift or DTC P1870, caused by wear in the control valve body, may be difficult to duplicate when the transmission temperature is below 93°C (200°F).
Cause
The condition may be due to wear in the control valve body. This wear occurs in the bore that contains the TCC isolator and regulator valves, and results in poor, or no, TCC apply

Important
DTC P1870 is a type B code. The conditions for setting the P1870 DTC must occur on TWO CONSECUTIVE TRIPS (ignition cycles, with a drive cycle) before setting a P1870 history code.
When the conditions for setting DTC P1870 are met (first trip), the PCM commands maximum line pressure and harsh 1-2 shifts are the result.
This may result in a harsh 1-2 shift with no history code if the conditions for setting the DTC required for the second trip are not met, on two consecutive trips (Ignition cycles, with a drive cycle).

When the conditions for setting the DTC are met, on the second consecutive trip, a DTC P1870 is stored as a history code.
When the P1870 code is stored, the PCM will turn on the Service Engine Soon (SES), Check Engine Light (CEL), or Malfunction Indicator Lamp (MIL).
Correction
Install a control valve body with the revised TCC regulator and isolator valves. These valves are used in all transmissions produced after January 15, 1999 (Julian Date 9015), and all of the service parts currently available through GMSPO contain revised TCC regulator and isolator valves.

Important
If all of the following conditions are true, it is not necessary to rebuild the transmission or to replace additional transmission components beyond the control valve body.

Transmission operation is normal before the transmission reaches operating temperature, or before DTC P1870 is set (no slips, flares, or missing gears).
The torque converter is not blue or overheated.
The transmission fluid is not burned or has no burned odor.
The transmission fluid pan contains no abnormal debris (clutch material, bronze, brass, or metal fragments

Jun 18, 2010 | 1998 GMC Jimmy

1 Answer

My car runs perfect but it has code p1870. oil trans looks a little light brown, i dont have any problem with the trans, it works very smooth. why check engine light it says code p1870????? can a dirty oil...


yes, when you burn your transmission fluid, its just like when you burn your motor oil. Lower vescosity means more friction. more friction, more heat, more heat messes with your sensors inside the trans causing them to send a code to the ecm. do a filter change and transmission flush. clear the code and retest.

May 05, 2010 | 1997 Buick LeSabre

2 Answers

DIRTY TRANSMISSION OIL .


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

May 05, 2010 | 1997 Buick Century

1 Answer

The check engine light is on on my car i put in the computer a said the code p1870 but i don't know whats that mean


P1870 is a code for a transmission component slipping. It would be very difficult to diagnose yourself. I suggest bringing it to a transmission shop.

Apr 16, 2009 | Oldsmobile 88 Cars & Trucks

1 Answer

1996 chevy lumina 3.4. service engine light on


You will need to replace the valve body in the transmission.

Mar 01, 2009 | 1996 Chevrolet Lumina Mini

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