Chevrolet P1870: Transaxle Component Slipping (4T60-E)

What Does The Chevrolet P1870 Code Mean?

Engine started, vehicle driven to a speed of 30-82 at an engine speed of 1000-3000 rpm, Fuel Shutoff inactive, TP angle from 8-35%, commanded gear not in 1st gear and the gear range is D4.

What Are The Potential Causes Of The Chevrolet P1870 Code?

• 1-2 shift solenoid valve has sediment, damage or leaking seals
• 2-3 shift solenoid valve has sediment, damage or leaking seals
• 3-2 shift solenoid valve has sediment, damage or leaking seals
• Valve body regulator apply valve stuck or regulator is scored

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources

• 2000 Chevrolet Camaro and Pontiac Firebird Service Manual – Volume 1, page 249.
• GM, 2013, Service Bullettin – Prior To Any Circuit Testing.
• GM, 2016, Service Bullettin – MIL Illumination Harsh 1-2 Shift And P0894 Or P1870 Setting After Torque Converter Or Transmission
  Replacement.
• GM, 2015, Service Bullettin – MIL Illumination Harsh 1-2 Shift And P0894 or P1870 Setting After Torque Converter Or Transmission
  Replacement.
• GM, 2003, Service Bullettin – Transmission Slipping or Torque Converter Clutch (TCC) Inoperative with No SES Light Displayed and No DTC P1780 (Reprogram PCM and Diagnose Vehicle Using P1870 Diagnostic Table).