2003 Saturn Vue sluggish shifting

Tiny
ZIGGYSKEIR
  • MEMBER
  • 2003 SATURN VUE
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 103,000 MILES
In "D" and "I" the auto is very sluggish. Starting and shifting. In "L" however, the auto is pretty decent. We have had it serviced regularly and religiously. Any thoughts?

thnx - richard
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Saturday, September 18th, 2010 AT 12:32 PM

7 Replies

Tiny
SATURNTECH9
  • EXPERT
First of all thank you so much for your donation. SO the transmission shift's good?Or is there a problem with the shifting?You say it's sluggish meaning the engine correct?Also could you please go to a auto part's store like auto zone and have them scan your car for code's if you have any please post the code number's. Let me know what you find.
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Saturday, September 18th, 2010 AT 9:48 PM
Tiny
ZIGGYSKEIR
  • MEMBER
Hi Louie, thnx for the reply. I do not have the codes yet. On Monday I will probably go to my mechanic. The purpose of this inquiry was to get some edification. A guide for a budget. I am guessing this is more than l fluids and hoping that we are not looking at a new or rebuild.

In Neutral the engine seems to run fine and the sound does not change when we put it gear, other than the normal. However, when we accelerate there is nothing to speak of. Certainly not what we are used to. It seems to be transmission, but I really do not know much about cars.

It is an automatic. You pocked up on that, I'm sure.

Best - richard
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Saturday, September 18th, 2010 AT 10:16 PM
Tiny
SATURNTECH9
  • EXPERT
If were talking about a engine power issue and the shifting is ok then were talking about an engine issue most likely. Let's start with what code's you have if you have any. Let me know what you find with the code's.
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Sunday, September 19th, 2010 AT 10:50 AM
Tiny
ZIGGYSKEIR
  • MEMBER
Hey Louis, Now this has happened a few times in my life, but it always baffles me, since the car is a machine and not organic. The problem seems to have gone away. We have been driving the car since the last note without a problem. The light is off and the engine and tranny seem to be fine. Go figure.

Thnx for your response. Next time I will check codes or otherwise have a stronger knowledge base (if possible) before writing.

Best - r
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Wednesday, September 22nd, 2010 AT 10:08 AM
Tiny
SATURNTECH9
  • EXPERT
Those went away on there own problem's are both baffling and usually come back eventually but let's hope for the best with yours. Keep me posted and check code's if it happens again.
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Wednesday, September 22nd, 2010 AT 11:46 AM
Tiny
ZIGGYSKEIR
  • MEMBER
Hey Louis,

I have some codes for you P1791, P0056, P0161, P2138, P0700. The mechanic suggested that mechanically the car is sound but the problems with certain sensors may be affecting the performance. Makes sense to me, but I am a woodworker!

Best - r
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Wednesday, October 6th, 2010 AT 10:10 AM
Tiny
SATURNTECH9
  • EXPERT
P0056 is The heated oxygen (HO2S) bank 2 sensor 2 is threaded into the front exhaust pipe directly behind the cylinder 2, 4, 6 pre-converter (cylinders 2, 4, 6 are closest to front of dash). The sensor is used by the ECM to determine the oxygen storage capability of the pre-converter, fuel trim biasing (time held lean or rich) and certain techniques used to diagnose DTCs associated with the pre-catalyst oxygen sensor. The sensor is equipped with a heater to provide additional heat to speed up sensor activation time. The ECM controls the heater by supplying a ground to circuit 5036. The ECM will pulse the heater until it has determined exhaust pipe moisture has evaporated (engine run time between 0 and 200 seconds ). After that, the ECM will command the heater On at a 100% duty cycle for 10 seconds , after which it will turn Off the heater for a very short amount of time to test for an open/low voltage condition. The ECM will continue to do this unless the exhaust gas temperature exceeds 850 C (1562 F ). The heater will be pulsed if this limit is exceeded. When the heater is commanded Off (circuit not grounded), the voltage level at the ECM should be high (ignition voltage). When the heater is commanded On (circuit grounded), the voltage level at the ECM should be low. The ECM heater feedback circuit uses a pull-up voltage (2.6-4.6 volts ), which allows the ECM to individually differentiate between an open, short to ground or short to voltage. DTC P0056 will set if the ECM detects an open heater control circuit when HO2S bank 2 sensor 2 is commanded Off with the engine cranking/running.

DTC PARAMETERS
DTC P0056 will set if HO2S bank 2 sensor 2 heater feedback voltage is between 2.6 and 4.6 volts (ECM pull-up voltage) indicating an open circuit when heater is commanded Off when:

* Condition exists for longer than 0.5 seconds
* Engine speed is greater than 40 rpm
* Main relay voltage is between 8.0 and 18.0 volts

DTC P0056 diagnostic runs continuously once the above conditions have been met.

P0056 is a type B DTC.

DIAGNOSTIC AIDS
To locate an intermittent problem. use Scan tool to monitor DTC P0056 LAST TEST just after the engine is started. The ECM will pulse the heater On and Off from anywhere between 0 and 200 seconds , then the ECM will turn it Off briefly every 10 seconds . Wiggling wires while watching for a change from PASSED to FAILED during the Off command may locate the area where an open in the wiring may exist.

Heater element resistance: 7.0-20.2 ohms .P0161 is The heated oxygen (HO2S) bank 2 sensor 2 is threaded into the front exhaust pipe directly behind the cylinder 2, 4, 6 pre-converter (cylinders 2, 4, 6 are closest to front of dash). The sensor is used by the ECM to determine the oxygen storage capability of the pre-converter, fuel trim biasing (time held lean or rich) and certain techniques used to diagnose DTCs associated with the pre-catalyst oxygen sensor. The sensor is equipped with a heater to provide additional heat to speed up sensor activation time. The ECM calculates the efficiency of the sensor heating element by calculating the internal sensor (NOT HEATER) resistance based on actual current and signal voltage measurements on circuit 1670 after the engine has been running a certain length of time. As temperature increases, the sensor internal resistance will decrease. The ECM compares modeled sensor resistance values to the measured values based on the calculated sensor temperature (exhaust gas temperature). If the heater is working properly, the internal sensor resistance will decrease at a certain rate based on the exhaust gas temperature. If the resistance takes too long to decrease or is too high after a certain amount of engine run time, the heater is assumed to be heating insufficiently. DTC P0161 will set if the calculated internal sensor resistance is too high after a certain length of engine run time indicating an inefficient heating element.

DTC PARAMETERS
DTC P0161 will set if the HO2S bank 2 sensor 2 calculated sensor resistance (based on the actual signal voltage and actual signal current) is greater than 63 ohms when:

* Engine run time is greater than 10 seconds
* Exhaust pipe moisture has evaporated (calculated engine run time between 0 and 200 seconds )
* Calculated converter temperature is between 330 and 585 C (626 and 1085 F )
* Main relay voltage is between 10.5 and 18 volts
* No HO2S bank 2 sensor 2 heater circuit DTCs have been set

DTC P0161 diagnostic runs continuously once the above conditions have been met.

P0161 is a type B DTC.

DIAGNOSTIC AIDS
If DTC P0160 is also set, diagnose that DTC first. An open in the sensor signal or sensor return may set this DTC.

Make sure no corrosion is present in the HO2S bank 2 sensor 2 harness connector and that all terminals (heater AND signal) are contacting correctly. If OK, replace the HO2S bank 2 sensor 2.

Heater element resistance: 7.0-20.2 ohms


http://www.2carpros.com/forum/automotive_pictures/416332_2003_vue_rear_o2_sensor_bank_2_sensor_2_1.jpg



http://www.2carpros.com/forum/automotive_pictures/416332_2003_vue_code_p1791_part1_1.jpg



http://www.2carpros.com/forum/automotive_pictures/416332_2003_vue_code_p1791_part2_1.jpg



http://www.2carpros.com/forum/automotive_pictures/416332_2003_vue_code_p1791_part3_1.jpg



http://www.2carpros.com/forum/automotive_pictures/416332_2003_vue_code_p1791_part4_1.jpg



http://www.2carpros.com/forum/automotive_pictures/416332_2003_vue_code_p1791_part5_1.jpg



http://www.2carpros.com/forum/automotive_pictures/416332_2003_vue_code_p1791_part6_1.jpg


I would start with the code p1791 first with the bullitine that will cover all your code's except your o2 sensor code's.I also emailed you some info let me know what you find.
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Thursday, October 7th, 2010 AT 2:29 PM

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