Conditions for Setting the DTC
WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban 3500 HD, and 2018 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
P0751
- 1st gear is commanded.
- TCM detects a gear ratio of 1.09 - 1.20.
- Gear slip is greater than 400 RPM for 2 s.
- The above conditions have to occur 8 times to set.
P0752
- 3rd gear is commanded.
- Transmission has achieved 1st or 2nd gear.
- Gear slip is 400 RPM for 1.5 s.
- TCM commands 4th gear if the above condition exist and detects a gear ratio of 3.82 - 4.22 for 1.5 s.
- The above conditions have to occur 5 times.