What Does P1306 Mean?
P1306 indicates a fault in the kickdown relay pull-in circuit, which is part of the automatic transmission's kickdown system. The kickdown relay engages when the driver depresses the accelerator fully to command a downshift for maximum acceleration. A circuit fault here means the transmission may not downshift properly under wide-open throttle.
Common Causes
35%
Failed kickdown relay
25%
Open or shorted wiring in the kickdown relay circuit
20%
Faulty kickdown switch at the throttle body or accelerator pedal
15%
Corroded connector pins at the relay or TCM
5%
Transmission control module (TCM) driver circuit failure
Diagnostic Steps
1
Locate the kickdown relay and check for proper operation by listening for a click when actuated manually or via scan tool.
2
Measure continuity and resistance of the relay coil and verify voltage at the relay socket with key on.
3
Inspect wiring between the kickdown switch, relay, and TCM for opens, shorts, or chafing.
4
Test the kickdown switch operation at the throttle body — it should close at full throttle.
5
Check for related TCM codes that may indicate a broader transmission control issue.
Estimated Repair Cost
$75 - $350
Parts + labor, varies by vehicle and location
P1306 indicates a fault in the kickdown relay pull-in circuit, which is part of the automatic transmission's kickdown system. The kickdown relay engages when the driver depresses the accelerator fully to command a downshift for maximum acceleration. A circuit fault here means the transmission may no...
The most common cause of P1306 (Kickdown Relay Pull - In Circuit Fault) is: Failed kickdown relay
Typical repair costs for P1306 range from $75 to $350, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Loss of kickdown functionality reduces passing and merging acceleration capability. While not immediately dangerous, reduced response during overtaking maneuvers can be a safety concern.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1306 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automatic Transmission Control
Difficulty
Type
Manufacturer
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