<!-- from fixya rte -->Can A DTC P0750 Generate A DTC P0706? - Cars & Trucks

Are there any DTC's - diagnostic trouble codes ?in the PCM / BCM ? You have third an fourth below 50 mph but above 50 it down shifts to 2nd gear ,is this what your saying or you don't have 3rd or 4th gears at all ? Which engine did yours come with ? 2.2 L or 4.3 L You trans can set several DTC'S an not all will turn on the check engine light .
DTC B2722 (4.3 L) DTC P0218 (2.2 L) DTC P0218 (4.3 L) DTC P0502 (2.2 L) DTC P0502 (4.3 L) DTC P0503 (2.2 L) DTC P0503 (4.3 L) DTC P0705 (2.2 L) DTC P0706 (4.3 L) DTC P0711 (2.2 L) DTC P0711 (4.3 L) DTC P0712 (2.2 L) DTC P0712 (4.3 L) DTC P0713 (2.2 L) DTC P0713 (4.3 L) DTC P0719 (2.2 L) DTC P0719 (4.3 L) DTC P0724 (2.2 L) DTC P0724 (4.3 L) DTC P0740 (2.2 L) DTC P0740 (4.3 L) DTC P0741 (4.3 L) DTC P0742 (2.2 L) DTC P0742 (4.3 L) DTC P0748 (2.2 L) DTC P0748 (4.3 L) DTC P0751 (2.2 L) DTC P0751 (4.3 L) DTC P0752 (4.3 L) DTC P0753 (2.2 L) DTC P0753 (4.3 L) DTC P0756 (2.2 L) DTC P0756 (4.3 L) DTC P0757 (4.3 L) DTC P0758 (2.2 L) DTC P0758 (4.3 L) DTC P0785 (2.2 L) DTC P0785 (4.3 L) DTC P1810 (2.2 L) DTC P1810 (4.3 L) DTC P1860 (2.2 L) DTC P1860 (4.3 L) DTC P1870 (2.2 L) DTC P1870 (4.3 L) DTC P1875 (4.3 L) .
Shift Pattern This category contains the following topics:
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One forward gear only

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Two forward gears only

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Gear missing or slipping

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No upshift or slipping upshift

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No downshifts

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Non-First gear start

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Refer to First Gear Range Only - No Upshift .

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Refer to Third Gear Only .

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Refer to Second/Third Gear Only or First/Fourth Gears Only .

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Refer to Slips in First Gear .

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Refer to Slipping or Harsh 1-2 Shift .

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Refer to No 2-3 Shift or 2-3 Shift Slips, Rough or Hunting .

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Refer to No 3-4 Shift, Slips or Rough 3-4 Shift .

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Refer to No Part Throttle or Delayed Downshifts .

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Refer to Second Gear Start .

code p 0706 refers to transmission range (TR) sensor/switch--range /performance problem===causes---wiring---TR sensor /switch
check for clean contacts in the harness connections -replace the sensor

try looking here
http://www.aboutautomobile.com/DTC/P0733/Ford

the code is for a malfunctioning shift control or range switch basically tells the vehicle what gear it is in... these sometimes corrode up and cause this dtc to be set semi common for the mdx .

P0750-Low Reverse SOLENOID CIRCUIT

This DTC is strictly an electrical fault and cannot be caused by any internal transmission failure other than an open in the Transmission Solenoid/TRS Assembly. If the Transmission Solenoid/TRS Assembly is in need of replacement - do not replace the Valve Body.

To replace the TRS assembly you need to remove the valve body first and then the TRS assembly is mounted on top of the valve body.

DTC P0708 - Transmission Range Sensor Circuit High Input

Check your transmission range sensor. There is a connector located where the cable attaches to the tranny on the back (firewall side). Be sure its connected and seated properly.

From what I understand the "range sensor" is basically the Input Turbine Speed Sensor. Be sure the connector for this is also clean. This code is also set by the Nuetral Safety switch. Check the switch with a multi meter to be sure its working properly.

Also, check your Engine Coolant Temperature Sensor. This sensor is used by the PCM to help control tranny operations.

Also, can check this additional information for 1998 Saturn SL1...

DTC P0706
The PCM determines which gear is selected by a combination of opens and grounds in circuits 771, 772, and 773 at the transaxle park/neutral
position switch. Each combination indicates a specific selection on the
manual shift quadrant, P, R, N, D, 2, or 3. Circuit 776 is either open
or grounded to produce an even number of grounded circuits, 771, 772,
773, and 776. Invalid data indicates that the sum of the grounded
circuits 771, 772, 773, and 776, in 1 of the manual shift quadrants is
equal to an odd number.

Conditions for Setting the DTC
DTC P0706 is set when the PCM has detected an invalid bit pattern for
more than 3.5 seconds, twice per ignition cycle.

The difference between DTC P0706 and DTC P0705 is that a possible bit pattern error due to misadjustment could set a DTC P0706.

Test Description
1. This step verifies the conditions for DTC P0706 still exist.
2. If the shift cable or switch is misadjusted, a DTC P0706 may set
while in certain gear shift positions.
3. DTC P0706 may set due to 1 or more circuits being shorted to
ground. By disconnecting the switch, the PCM should read all circuits as high and the scan tool should display OPEN.
4. This step will isolate an open circuit. As each individual circuit
is grounded, the PCM/TCM should see the low signal and the tool should display INVALID.
5. The PCM/TCM supplies a 12 volt signal to each transaxle park/neutral position switch circuit. This step tests for that voltage.
6. DTC P0706 may have been set due to 1 of the circuits being shorted
to voltage. This step verifies if a short to voltage exists.

Repair Verification
Monitor DTC menu Code Status for Pass Since Code Clear and Pass This Ignition Cycle. When both have passed, the repair is verified.

Criteria for pass:
* No active DTC set.
* Two valid selector positions are decoded. You must move the
shifter to obtain a pass.

Diagnostic Aids
When the PCM detects a fault in the circuit, an open, ground, or short,
the PCM will open the circuit internally to protect the circuit.

If no circuit problems can be detected, check the shift cable and switch
adjustment.

Important
Refer to the chart from DTC P0705.

This DTC will cause the transaxle to start out in 2nd gear.

Hope helps (remember rated this).

replace your trans range sensor or {trs}

im not a trans. expert but would verify the range sensor (gear indicating sensor) is working properly and the L/R solenoid is ok. those are the 2 suspects for your problem