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Abs code undefined p1870(pd) for 99 gmc jimmy

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Posted on Jan 02, 2017

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SOURCE: 1997 SUBURBAN CODE P1870(PD) NO POWER

Check for loose or faulty wire connections at distributor, coil, or altenator. Also check your fuel pump or fuel injectors and system.

Posted on Sep 14, 2009

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2 Answers

96 GMC jimmy abs fuse location


Either in fuse block on side of dash near driver's door, or fuse block under hood.

Jun 04, 2015 | 1996 GMC Jimmy

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What does the code p1870/ transmission slipping component mean ?


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.

Sep 06, 2011 | 1999 GMC Jimmy

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1996 gmc jimmy codes p1870, p1192, po700


Maybe my data is not up to date, but my list does not show any of these trouble codes.

Dec 03, 2010 | 1996 GMC Jimmy

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

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

I have a 1998 jimmy that just showed up a p1870 code 20 miles into a drive. Why would it do this after a clean scan and a problemless 120 mile trip and then another clean scan after the trip?


code p1870 refers to a transmission slippage problem,hope this helps if you need more help get back to me,also check fluid level. please rate my help Thanks Ray. ps if you need more help get back to me there are at least 6 conditions that will set this code example VSS or vechicle speed sensor out of specification,just to name one

Feb 10, 2010 | 1998 GMC Jimmy

1 Answer

1997 SUBURBAN CODE P1870(PD) NO POWER


Check for loose or faulty wire connections at distributor, coil, or altenator. Also check your fuel pump or fuel injectors and system.

Sep 14, 2009 | 1997 Chevrolet Suburban

1 Answer

Emmission codes, Mass air flow sensor


The P0101 code is indeed a code indicating an issue with the MAF sensor. It could be something as simple as cleaning the sensor, or it could be faulty and in need of replacement.

Now, the P1870 code refers to the transmission, and a condition in which the PCM is detecting excessive slipping. That is to say it perceives the transmission slipping as it compares engine speed (RPM) and vehicle speed (MPH) and should a ratio be exceeded then the PCM will set code P1870. I would expect that you would notice a bit harsher shifting in response to this code, particularly on the 1-2 shift as the PCM will command higher fluid pressure to combat the slipping.

Now, it is possible that the an issue with the MAF would cause signals to the PCM to change significantly and to such an extent that the PCM would think something is off with the transmission, so I would start there, with the MAF sensor and see if that helps as it appears you were already thinking.

Jan 02, 2009 | 1999 GMC Jimmy

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