What Does P2805 Mean?
The PCM has detected a mismatch or inconsistency between transmission range sensor 'A' and sensor 'B' signals. These sensors report the gear selector position, and when their readings don't correlate properly, the PCM flags this code.
Common Causes
35%
Faulty or misaligned transmission range sensor
30%
Damaged or corroded wiring/connectors between sensors and PCM
20%
Misadjusted transmission shift linkage or cable
10%
Internal transmission mechanical failure affecting sensor mounting
5%
PCM software needs update or PCM failure
Diagnostic Steps
1
Step 1: Perform a visual inspection of both transmission range sensors and verify proper mounting and alignment
2
Step 2: Use scan tool to monitor live data from both range sensors while shifting through all gear positions
3
Step 3: Inspect wiring harness and connectors for damage, corrosion, or loose connections at both sensors
4
Step 4: Check and adjust shift linkage/cable alignment per manufacturer specifications
5
Step 5: Test sensor resistance and voltage output values against specifications; replace faulty sensor if out of range
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The PCM has detected a mismatch or inconsistency between transmission range sensor 'A' and sensor 'B' signals. These sensors report the gear selector position, and when their readings don't correlate properly, the PCM flags this code.
The most common cause of P2805 (Transmission Range Sensor "A"/"B" Correlation) is: Faulty or misaligned transmission range sensor
Typical repair costs for P2805 range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may fail to start in Park, start in wrong gear, or shift erratically. May experience unexpected movement when starting.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2805 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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