Circuit Failure

[Xelab4]

I have a 1999 S10 2wd 4door chevy Blazer.

 

The check engine soon light for the last 2000 miles intermittenly comes on and off. Sometimes for 200 miles at a time either way.

 

I checked the code and it says P1875. It is either "Transmission Transfer Case 2-wheel driveSolenoid Circuit failure" or Transmission Automatic Hall Effect Sensor Power Circuit Failure"

 

The truck is worth $4000 according to Kelly BB. Am I looking at $2000 bucks to repair or is this something that is a matter of changing a sensor. I have a bud that is a shade tree man could this be taken care of outside a shop?

 

Any suggestions to a remedy? The truck runs great I can't distinguish a proplem at all when I drive it except the light sometimes is illuminated.

 

Xela

[ChevyTech007]

Subject: Lack of Power and the Vehicle has Shifted to 4th Gear with TCC Engaged by 20 MPH (32 KMH) - keywords 4L60E 4L80E 233E 236 241 243E 246 246EAU 261 263 263EAU 4482 4484 T150 P1875 #PIP3026A - (11/22/2005)

 

 

 

Models: 1993-2006 All Light Duty Trucks And Utilities

 

 

 

 

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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

 

Condition/Concern:

Transmission may have quick upshifts and is in fourth gear with TCC applied by 20 mph (32 kph). Sometimes DTC P1875 may accompany concern. The customer may also describe the condition as a lack of power, chuggle, miss, shake, or surge. This condition can also occur on 2WD models.

 

Recommendation/Instructions:

The ECM, PCM, or VCM may believe that the Transfer Case is in 4low and change the shift pattern accordingly. Use the Tech I /Tech II to verify the status of the 4low input. If the 4low input status is "YES" or "ENABLED" with the Transfer Case in 2WD or 4WD High or if this is a 2WD vehicle then the 4low signal circuit is shorted to ground. This could be caused be the 4low circuit being shorted to ground or the TCCM and or ECM, PCM, or VCM is taking the circuit to ground.

 

Disconnect the TCCM "If Equipped". If concern goes away, replace TCCM. If concern is still present go to step 2.

Remove 4low signal circuit from ECM, PCM, or VCM connector and if concern goes away inspect the 4low signal circuit for being shorted to ground. If concern is still present with the 4low signal circuit removed from ECM, PCM, or VCM connector then replace the ECM, PCM, or VCM.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.