What Does P1092 Mean?
The tumble generator valve on the left bank is stuck in the open position. This valve controls intake air turbulence for better combustion efficiency and emissions control. The PCM has detected the valve is not responding to close commands.
Common Causes
35%
Carbon buildup or debris preventing valve closure
30%
Failed tumble valve actuator motor
20%
Broken or disconnected valve linkage
10%
Wiring or connector issues to actuator
5%
Failed PCM output driver
Diagnostic Steps
1
Step 1: Visually inspect tumble valve actuator and linkage for physical damage or disconnection
2
Step 2: Test actuator operation using bidirectional scanner controls while observing valve movement
3
Step 3: Check voltage and ground at actuator connector with key on
4
Step 4: Remove and inspect valve for carbon buildup, binding, or mechanical failure
5
Step 5: Test actuator motor resistance and operation on bench if removed
Estimated Repair Cost
$150 - $450
Parts + labor, varies by vehicle and location
The tumble generator valve on the left bank is stuck in the open position. This valve controls intake air turbulence for better combustion efficiency and emissions control. The PCM has detected the valve is not responding to close commands.
The most common cause of P1092 (Tumble generator valve #2 (LH) malfunction (stuck open)) is: Carbon buildup or debris preventing valve closure
Typical repair costs for P1092 range from $150 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but may experience reduced fuel economy and slightly rougher idle. Engine performance minimally affected under most conditions.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1092 to identify the root cause.
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Quick Info
Category
Powertrain
System
Air Intake System
Difficulty
Type
Manufacturer
Recommended Tools
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