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P1870 CHEVROLET - Transmission Component Slipping

Possible causes
- Trailer towing may set code
- Check transmission fluid level
- Internal transmission fault
What does this mean? What does this mean?
Tech notes

User Submitted Video
What does this mean? What does this mean?
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1870 Chevrolet Description

With the engine speed over 500 rpm for 5 seconds, Fuel Shutoff inactive, throttle angle from 8.5-35%, Transaxle not in First gear, Transaxle gear range is D4, Transmission Fluid Temperature (TFT) Sensor input 68-266°F, engine torque from 50-200 ft-lbs, engine vacuum 0-105 kPa, Torque Converter Clutch (TCC) commanded on and at Max apply for over 5 seconds, the Powertrain Control Module (PCM) detects a TCC slip speed of over 200 rpm for over 5 seconds, all conditions met for 3 times with TCC commanded off each time in between cycles.

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