When it comes to diagnosing and fixing issues related to the Chevrolet P2771 Code, it is important to understand the root cause of the fault. In this article, we will discuss the causes and solutions related to the P2771 Code. The P2771 Code is defined as Four Wheel Drive (4WD) Low Switch Circuit and the description includes a range of DTCs, system voltage, engine speed, vehicle speed, TP angle, gear range, and TFT. This article will provide a thorough explanation of the causes and solutions related to the Chevrolet P2771 Code.
Causes and Solutions of Chevrolet P2771 Code
| Causes | Solutions |
|---|---|
| The TCCM calculated transfer case ratio is not consistent with the position of the transfer case shift control switch. | Check the transfer case shift control switch and TCCM. |
| The TCSCS indicates 4WD LOW range and the TCCM calculated transfer case range indicates 4WD HIGH. | Repair any wiring or connector defects. |
| No throttle position (TP) sensor DTCs P0122, or P0123. | Replace the TP sensor. |
| No OSS assembly DTCs P0722 or P0723. | Replace the OSS assembly. |
TCCM Calculated Transfer Case Ratio
The Transfer Case Control Module (TCCM) determines the transfer case ratio based on the position of the transfer case shift control switch. When the TCCM calculated transfer case ratio is not consistent with the position of the transfer case shift control switch, the P2771 code will be triggered. In this case, the cause of the P2771 code is the transfer case shift control switch.
TCSCS Indicates 4WD Low Range and TCCM Calculated Transfer Case Range
When the Transfer Case Shift Control Switch (TCSCS) indicates 4WD LOW range and the TCCM calculated transfer case range indicates 4WD HIGH, the P2771 code will be triggered. In this case, the cause of the P2771 code is any wiring or connector defects.
No Throttle Position (TP) Sensor DTCs
When there are no Throttle Position (TP) sensor DTCs P0122, or P0123, the P2771 code will be triggered. In this case, the cause of the P2771 code is the TP sensor.
No OSS Assembly DTCs
When there are no Output Shaft Speed (OSS) assembly DTCs P0722 or P0723, the P2771 code will be triggered. In this case, the cause of the P2771 code is the OSS assembly.
Conclusion
The Chevrolet P2771 Code is an important code to understand when diagnosing and fixing issues related to the four-wheel-drive system. This article provided an in-depth explanation of the causes and solutions related to the P2771 Code. The root causes of the P2771 Code include the TCCM calculated transfer case ratio being inconsistent with the position of the transfer case shift control switch, the TCSCS indicating 4WD LOW range and the TCCM calculated transfer case range indicating 4WD HIGH, no throttle position (TP) sensor DTCs P0122 or P0123, and no OSS assembly DTCs P0722 or P0723. The corresponding solutions to the P2771 Code include checking the transfer case shift control switch and TCCM, repairing any wiring or connector defects, replacing the TP sensor, and replacing the OSS assembly. If you are experiencing issues with the Chevrolet P2771 Code, it is important to follow the troubleshooting steps outlined in this article to identify and fix the issue.
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