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Check engine light and code P0700

Tiny
COLEMAC108
  • MEMBER
  • 2001 CHEVROLET 2500
  • 8.1L
  • V8
  • 4WD
  • AUTOMATIC
  • 181,000 MILES
I recently purchased the truck listed above it is an HD. It has a check engine light when the code is read, reads P0700. All I could find was "Transmission Control Module Requested MIL Illumination". The truck drives fine but will not pass smog with the light on. Previous owners say the truck went into limp mode.
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Thursday, April 12th, 2018 AT 9:50 PM

4 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
You will require diagnostic scanner that can communicate with the TCM, a generic scanner will not have this function, you need to be able to read the information in the TCM check with any of the larger workshops near you, they may have this capability.
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Friday, April 13th, 2018 AT 12:28 AM
Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
If you have an Advance Auto near you, there will retrieve the codes from the transmission control module for free, AutoZone might too, but it all depends if their scan tool has the capability. That P0700 code means that the TCM has a code stored in it.
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Friday, April 13th, 2018 AT 7:10 AM
Tiny
COLEMAC108
  • MEMBER
  • 2 POSTS
Okay, thank you for that. I drove the truck about fifteen miles home and it drove as normal as I could tell. No hard shifts, no high rpm's, no slipping in the transmission. Could it be something as simple as needing a new TCM? Obviously I will need to actually read what code is on it now but I am just hoping that this is not going to turn into a $2,000.00 or more repair.
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Friday, April 13th, 2018 AT 7:06 PM
Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
It could be any one of these and possibly a few others.
DTC Description
DTC P0218 Transmission Fluid Overtemperature
DTC P0500 (6.6L) Vehicle Speed Sensor (VSS) Circuit
DTC P0500 (8.1L) Vehicle Speed Sensor (VSS) Circuit
DTC P0562 System Voltage Low
DTC P0563 System Voltage High
DTC P0700 Transmission Control Module (TCM) Requested MIL Illumination.
DTC P0701 Transmission Control System Performance.
DTC P0703 Brake Switch Circuit.
DTC P0708 (Two Connector NSBU) Transmission Range (TR) Switch Circuit High Voltage.
DTC P0711 TFT Sensor Circuit Range/Performance.
DTC P0712 Transmission Fluid Temperature (TFT) Sensor Circuit Low Input.
DTC P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Input.
DTC P0716 . Input Speed Sensor Circuit Intermittent.
DTC P0717 Input Speed Sensor Circuit Low Input.
DTC P0721 Output Speed Sensor Performance.
DTC P0722 Output Speed Sensor Circuit Low Voltage.
DTC P0726 Engine Speed Circuit Performance.
DTC P0727 Engine Speed No Signal.
DTC P0731 Incorrect 1st Gear Ratio.
DTC P0732 Incorrect 2nd Gear Ratio.
DTC P0733 Incorrect 3rd Gear Ratio.
DTC P0734 Incorrect 4th Gear Ratio.
DTC P0735 Incorrect 5th Gear Ratio.
DTC P0736 Incorrect Reverse Ratio.
DTC P0741 TCC System Stuck Off.
DTC P0742 TCC System Stuck On.
DTC P0748 Pressure Control Solenoid Circuit Electrical.
DTC P0763 Shift Solenoid (SS) 3 Control Circuit High Voltage.
DTC P0768 Shift Solenoid (SS) 4 Control Circuit High Voltage.
DTC P0773 Torque Converter Clutch (TCC) Enable Solenoid Control Circuit.
DTC P0778 Pressure Proportional to Current (PPC) solenoid Circuit.
DTC P0840 Pressure Switch Manifold (PSM) Switch C Circuit.
DTC P0841 Pressure Switch Manifold (PSM) Switch C Circuit.
DTC P0842 Pressure Switch Manifold (PSM) Switch C Circuit.
DTC P0843 Pressure Switch Manifold (PSM) Switch C Circuit.
DTC P0845 Pressure Switch Manifold (PSM) Switch D Circuit.
DTC P0846 Pressure Switch Manifold (PSM) Switch D Circuit.
DTC P0847 Pressure Switch Manifold (PSM) Switch D Circuit.
DTC P0848 Pressure Switch Manifold (PSM) Switch D Circuit.
DTC P1571 Requested Torque Signal Circuit
DTC P1688 Throttle Kickdown Signal Circuit.
DTC P1709 Transmission Pressure Switch Solenoid E Circuit.
DTC P1710 Transmission Pressure Switch Solenoid E Circuit Stuck Open.
DTC P1711 Transmission Pressure Switch Solenoid E Circuit Stuck Closed
DTC P1712 Transmission Pressure Switch Solenoid E Circuit High.
DTC P1713 Transmission Reverse Pressure Switch Circuit Malfunction.
DTC P1714 Transmission Reverse Pressure Switch Circuit Stuck Open.
DTC P1720 Solenoid A Controlled Clutch Stuck Off.
DTC P1721 Solenoid B Controlled Clutch Stuck Off.
DTC P1723 Solenoid A Controlled Clutch Stuck On.
DTC P1724 Solenoid B Controlled Clutch Stuck On.
DTC P1760 TCM Supply Voltage.
DTC P1779 Engine Torque Delivered To TCM Signal.
DTC P1860 TCC PWM Solenoid Circuit Electrical.
DTC P1875 4WD Low Switch Circuit Electrical.
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Saturday, April 14th, 2018 AT 6:36 AM

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