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What is a c1275 code on olds alero is it tps sensor 2.4 liter eng

When this code occours c1275 the pcm is requesting the ets to be disabled the trans stays in 2nd gear with codes po 753 po758 c1275 all speed sensors have been replaced the trans has been replaced question is do i have a bad pcm on a 2001 old alero with a 2.4 liter

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

SOURCE: speed sensor location

Hi my name is Allen!

Both the Input and Output speed sensors or mounted on the side of the trans, they are not to far away from each other, you will see the electrical plug coming out of eack one of them. They are round, biege in color with a black end on it where the connector plugs into. If you don't know which one is bad you will need to replace them both.

For further assistance contact me at FixYa!

Posted on Jan 03, 2009

ginko
  • 19396 Answers

SOURCE: 2000 sonata check engine lite came on,

The output speed sensor is located on top of the transmission output shaft, this will send speed value to the transmission control module (TCM).
The vehicle speed sensor is installed on the differential of the transmission, and sends speed value to speed gauge on instrument cluster.

Check also IAC valve and look for vacuum leaks using an hand tool gauge(Vacuum Gauge and Fuel Pump Pressure).

Posted on Aug 19, 2009

  • 1201 Answers

SOURCE: I have a 99 dodge dakota w the codes po 753 and po 720

Just ask for the 3,4 shift solenoid, in which case the transmission pan has to be taken off, the filter, and possibly the valve body to get at the solenoid, I don't have my manual right now, so I can't tell you which solenoid it is.
The speed sensor is usually screwed into the side of the tranny near the back end of it, don't confuse it with the back up light switch, that's screwed in somewhere in the center of the tranny. Hope this helped a little. Good Luck.

Posted on Oct 18, 2009

Testimonial: "Thank ya problem fixed :)"

  • 189 Answers

SOURCE: 2.0 dodge neon. stuck n second gear.

these transmissions are notorious for being "junk" replace transmission.

Posted on Apr 14, 2010

toneman2121
  • 775 Answers

SOURCE: 2001 Olds Alero oxygen sensor bank 1 P0135

p0135 indicates bank 1 sensor 1 which is before the cat.

Posted on May 22, 2010

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1 Answer

Why is ets light and check engine light staying on and transmission shifts very rough?


look for trouble code pcm, for transmission problem it's normal when there is a code affecting trans . in default mode pcm command high pressure not to burn it . could command no tcc or 4th gear
hope it helps

Oct 12, 2014 | Chevrolet Cars & Trucks

1 Answer

Saturn sc2 problem


DTC P0732 sets when 2nd clutch still slips after the PCM has commanded high main line pressure
DTC P0734 sets when 4th clutch still slips after the PCM has commanded high main line pressure.
DTC P0733 sets when 3rd clutch still slips after the PCM has commanded high main line pressure.
The powertrain control module (PCM) uses the crankshaft position (CKP) sensor, input speed sensor (ISS) and output speed sensor (OSS) to determine engine speed, input shaft speed and output shaft speed. These sensor readings are used to determine the current gear ratio and RPM slip across the torque converter. The PCM uses this information from the sensors to determine if the commanded gear matches the actual gear. During normal driving conditions, the PCM will adapt main line pressure via the pressure control (PC) solenoid to prevent slipping and harsh shifts. Shift solenoid 2 is used to apply or release second gear clutch. The PCM controls 2nd gear by controlling the ground for shift solenoid 2. The PCM will turn the solenoid Off (open the driver circuit) when second gear is commanded On to apply 2nd clutch. Shift solenoid 2 is supplied ignition voltage from the fuel pump relay whenever the PCM commands the fuel pump relay On.
Do you know how to test main line pressure ? Also , with the valve body off air check clutch packs . Do you know how to do that ? How many miles on the trany ?

Auto Trans Rebuild Chapter 8 Air Check
Making sure clutch packs are good .

Jun 08, 2017 | 2005 Saturn SC2

1 Answer

Only runs in 1st and 2nd gear and reverse.


This is a fault mode in which the transmission either loses electrical power or the PCM deactivates all of the electronics. The transmission will default to max line pressure. The driver will have Reverse and 3rd, with manual 2nd available by putting the gearshift in 2 or 1 (doesn't matter). 1st, 4th, and TCC lockup will not be available. It will not hurt the car to drive it like this for short periods, but use manual 2nd to get the car moving, and be aware that the trans will generate more heat than normal while operating in limp-home mode due to increased torque converter slippage during 2nd gear starts and no lockup in 3rd gear.

Trans shifts into gear harshly, car feels sluggish off the line
, No 1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only available gears, CEL is on: Transmission is either in limp-home mode or has lost electrical power. If there are lots of error codes in the PCM, check the under hood fuse that powers the transmission, and if it pops again, look for a short in that circuit like an O2 sensor harness touching exhaust. Otherwise, check PCM codes for a particular fault in the transmission causing the PCM to put it in limp-home mode.

No 1st or 4th available; trans shifts 2nd to 3rd by itself in D or OD and locks the converter : ShiftA solenoid failed. Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.

Car goes into gear but feels very sluggish like the brakes are dragging, but it will roll easily (starts out in 4th gear), you manually shift to 2 to get it moving, once it's moving you put it back in OD and the car shifts 3rd to 4th on its own and locks the converter at the appropriate time: ShiftB solenoid failed: Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.

Dec 14, 2009 | 2006 Hummer H3

1 Answer

4L 60E - 2001 k1500 will not shift into 3-4. Oil is not burn't and stifts great into1-2


  • No 3rd or 4th gear: “3-4” clutches are worn out. R&R. The car is safe to drive (in 2) until you can get it fixed.
  • Trans shifts into gear harshly, car feels sluggish off the line, No 1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only available gears, CEL is on: Transmission is either in limp-home mode or has lost electrical power. If there are lots of error codes in the PCM, check the under hood fuse that powers the transmission, and if it pops again, look for a short in that circuit like an O2 sensor harness touching exhaust. Otherwise, check PCM codes for a particular fault in the transmission causing the PCM to put it in limp-home mode.
  • No 1st or 4th available; trans shifts 2nd to 3rd by itself in D or OD and locks the converter : Shift A solenoid failed. Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.
Check to see if your transmission is in the limp mode, which would only give you 2nd, 3rd and reverse gears. No 1st or 4th gear.

Nov 19, 2009 | 2003 GMC Sierra 1500

1 Answer

I have a 99 dodge dakota w the codes po 753 and po 720


Just ask for the 3,4 shift solenoid, in which case the transmission pan has to be taken off, the filter, and possibly the valve body to get at the solenoid, I don't have my manual right now, so I can't tell you which solenoid it is.
The speed sensor is usually screwed into the side of the tranny near the back end of it, don't confuse it with the back up light switch, that's screwed in somewhere in the center of the tranny. Hope this helped a little. Good Luck.

Oct 18, 2009 | 1999 Dodge Dakota

2 Answers

2002 Dodge Caravan with approx. 66,000 miles, check engine light came on, seemed to have stayed in 2nd gear. Could it be a pac solenoid transmission problem?


You need to find someone who can pull the codes from the transmission and see what kind of trans fault it is. If there is a fault in the trans the controller will put it into limp in mode which is 2nd gear locked. Won't shift out of 2nd...You need to pull the codes and see if it is internal in the trans or an external sensor-Good Luck

Oct 13, 2009 | 2002 Dodge Caravan

2 Answers

Code PO7056 and PO758


Those codes are for the B shift solenoid you either have a faulty solenoid or wire issue to that solenoid,the pan will have to come down the solenoid checked and the wiring from the PCM to the trans checked.I have seen alot of wiring rubbed thru ontop of the bell housing on this model.

Sep 27, 2009 | 2002 Chevrolet Blazer

1 Answer

I have a 97 Sunfire 2.2 automatic. ( 4 speed) I had a electrical problem and had to replace the under dash wiring harness. ( burned wires.) When replaced the car started and almost everything works. I have...


codes are for 1-2 & 2-3 shift solenoid if it was a fuse you would have more codes- abs light need to scan for codeI would check wires at trans connection known to go bad also ck pcm & wiring from pcm to trans that runs along under radiater core support

Sep 21, 2009 | 1997 Pontiac Sunfire

1 Answer

1998 chevy blazer


po 753 Shift solenoid A electrical problem po758Shift solenoid B electrical problem hope this helps

Apr 09, 2009 | 1998 Chevrolet Blazer

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