Need help with MAF sensor and tranny.
#1
08-20-2010, 10:05 AM
Need help with MAF sensor and tranny.
Hey there guys, I am new to the forums I recently purchased a 1996 camaro z28 and I have a few problems, first off I need a MAF sensor, what kind should I get? Yes I plan on modding. Second, I have a check engline light and the code P1870 popped up, deals with the tranny, the thing is it shifts fine, what could it be? Third but not least, the gas indicator is faulty, how do i fix that? Can I get a replacement sensor or something from the JY? Thanks!!
#2
08-20-2010, 10:25 AM
Join Date: Mar 2009
Location: Tokeland, Washington
Posts: 21,645
granateli makes a good onet found this on the 1870 code
Harsh 1-2 Upshift, SES, MIL, or CEL Illuminated, DTC P1870 Set (Replace Valve Body) #01-07-30-023B - (Mar 22, 2002)
Harsh 1-2 Upshift, SES, MIL, or CEL Illuminated, DTC P1870 Set (Replace Valve Body)
1996 Buick Roadmaster
1996 Cadillac Fleetwood
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, 2000 (Julian Date 0015)
This bulletin is being revised to update VIN Breakpoint Date information and revise the Parts Information table. Please discard Corporate Bulletin Number 01-07-30-023A (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. Refer to the Parts Information table below (two pages of parts depending on year, model, and engine, let me know what you have). These valves are used in all transmissions produced after January 15, 2000 (Julian Date 0015), 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).
Harsh 1-2 Upshift, SES, MIL, or CEL Illuminated, DTC P1870 Set (Replace Valve Body) #01-07-30-023B - (Mar 22, 2002)
Harsh 1-2 Upshift, SES, MIL, or CEL Illuminated, DTC P1870 Set (Replace Valve Body)
1996 Buick Roadmaster
1996 Cadillac Fleetwood
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, 2000 (Julian Date 0015)
This bulletin is being revised to update VIN Breakpoint Date information and revise the Parts Information table. Please discard Corporate Bulletin Number 01-07-30-023A (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. Refer to the Parts Information table below (two pages of parts depending on year, model, and engine, let me know what you have). These valves are used in all transmissions produced after January 15, 2000 (Julian Date 0015), 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).
Last edited by craby; 08-20-2010 at 10:28 AM.
#3
08-20-2010, 10:31 AM
I dont mind spending the extra cash on a good MAF honestly, so...for the tranny I need a new control valve body, not too bad, how much does that go for? And the diagnosis seems true, it does do a harsh 1-2 upshift. Now do you know about the gas sensor?
PS thank you so much for the help.
PS thank you so much for the help.
#4
08-20-2010, 10:38 AM
Join Date: Mar 2009
Location: Tokeland, Washington
Posts: 21,645
the 4th gen gas tank is shaped and situated in such a way the the gage is weird. when full they show past full, emty can be anywhere from e to 1/4 depending on the car. my first one ran out at 1/8 tank and this one will go to e but once it gets to 1/2 it drops really fast. if this is what you are experiancing then its normal and theres really not alot you can do about it.
#5
08-20-2010, 10:41 AM
Join Date: Mar 2009
Location: Tokeland, Washington
Posts: 21,645
heres a couple good sites for aftermarket trany parts.
http://www.700r4l60e.com/
http://www.transmissioncenter.net/4l60e.htm
http://www.700r4l60e.com/
http://www.transmissioncenter.net/4l60e.htm
#6
08-21-2010, 02:16 AM
yeah just try to always fill up around the half way mark to be safe. you get used to it after a while. still surprises me sometimes how fast it goes down after the halfway mark. definitely learned the hard way a couple times. but I've found that the guage goes up when I accelerate or turn left, goes down when braking or turning right.
#7
08-21-2010, 12:30 PM
Ah okay so it is common im not going crazy thats great news, for the MAF would this be a good one? http://www.amazon.com/Python-Injecti...tive&carId=001
#8
08-21-2010, 12:33 PM