What Does P2801 Mean?
The PCM has detected that the Transmission Range Sensor 'B' signal is present but does not match expected parameters for the current operating conditions. The signal may be out of range, implausible compared to sensor A, or not correlating with vehicle speed and engine load.
Common Causes
30%
Misadjusted or loosely mounted transmission range sensor B
25%
Worn or damaged internal shift linkage, detent lever, or manual valve
20%
Failing transmission range sensor with intermittent or inconsistent readings
15%
External shift linkage misadjustment or binding preventing accurate position detection
10%
Contaminated or damaged TR sensor contacts due to transmission fluid degradation
Diagnostic Steps
1
Step 1: Compare live data readings from TR sensor A and TR sensor B across all shifter positions; note any discrepancies
2
Step 2: Verify external shift linkage adjustment and smooth operation through all gear positions
3
Step 3: Check TR sensor mounting bolt torque and verify sensor is properly seated on transmission case
4
Step 4: Inspect internal shift linkage through transmission pan if external adjustment doesn't resolve issue
5
Step 5: Perform TR sensor relearn/adaptation procedure per manufacturer specifications if available
Estimated Repair Cost
$175 - $600
Parts + labor, varies by vehicle and location
The PCM has detected that the Transmission Range Sensor 'B' signal is present but does not match expected parameters for the current operating conditions. The signal may be out of range, implausible compared to sensor A, or not correlating with vehicle speed and engine load.
The most common cause of P2801 (Transmission Range Sensor "B" Circuit Range/Performance) is: Misadjusted or loosely mounted transmission range sensor B
Typical repair costs for P2801 range from $175 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Transmission may shift harshly, fail to shift properly, or vehicle may exhibit unexpected movement when shifter is moved. Backup camera and lights may activate incorrectly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2801 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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