What Does P2843 Mean?
The Shift Fork D position sensor circuit is reading higher voltage than the TCM's maximum acceptable threshold. This high voltage prevents accurate gear position feedback.
Common Causes
35%
Open circuit in sensor ground or signal return wire
30%
Shift fork position sensor internal failure with open circuit
20%
Short to voltage in sensor signal wire
15%
Damaged or corroded connector causing high resistance
Diagnostic Steps
1
Step 1: Check for proper ground connection at sensor by measuring voltage drop between sensor ground and battery negative
2
Step 2: Disconnect sensor and measure voltage at sensor connector pins from TCM
3
Step 3: Test for short to battery voltage in signal circuit using voltmeter
4
Step 4: Inspect all wiring for damage, especially near hot exhaust components or sharp edges
5
Step 5: Test sensor resistance and operation using manufacturer specifications
Estimated Repair Cost
$350 - $1,600
Parts + labor, varies by vehicle and location
The Shift Fork D position sensor circuit is reading higher voltage than the TCM's maximum acceptable threshold. This high voltage prevents accurate gear position feedback.
The most common cause of P2843 (Shift Fork "D" Position Circuit High) is: Open circuit in sensor ground or signal return wire
Typical repair costs for P2843 range from $350 to $1,600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May result in incorrect gear selection or transmission entering fail-safe mode. Vehicle may experience reduced performance or limited gear availability.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2843 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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