What Does P0892 Mean?
The PCM or TCM has detected an intermittent signal on the transmission control module power relay sense circuit. The sense voltage is fluctuating between expected and unexpected values, indicating a connection that is making and breaking contact. This intermittent condition can cause the TCM to momentarily lose power verification, leading to sporadic transmission control issues.
Common Causes
35%
Loose or corroded connector pins at the TCM power relay or TCM
25%
Intermittent open or short in the sense circuit wiring due to chafing or heat damage
20%
TCM power relay with worn or pitted contacts causing intermittent connectivity
15%
Poor ground connection at the TCM or relay causing voltage fluctuations
5%
Vibration-induced disconnection in harness routing near engine or exhaust
Diagnostic Steps
1
Perform a wiggle test on the TCM power relay connector, TCM connector, and associated wiring while monitoring the sense circuit voltage with a multimeter or scan tool live data.
2
Inspect the TCM power relay connector and TCM connector for backed-out pins, corrosion, or spread terminals; clean and reseat as necessary.
3
Remove the TCM power relay and inspect the contacts for pitting or carbon buildup; replace if signs of arcing are present.
4
Check the TCM ground points for corrosion and tightness; clean and retorque ground bolts.
5
If the fault persists, use a digital storage oscilloscope on the sense circuit to capture intermittent dropouts while driving.
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The PCM or TCM has detected an intermittent signal on the transmission control module power relay sense circuit. The sense voltage is fluctuating between expected and unexpected values, indicating a connection that is making and breaking contact. This intermittent condition can cause the TCM to mome...
The most common cause of P0892 (TCM Power Relay Sense Circuit Intermittent) is: Loose or corroded connector pins at the TCM power relay or TCM
Typical repair costs for P0892 range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Intermittent power relay sense faults can cause momentary TCM confusion leading to unexpected gear changes, brief limp mode activation, or delayed shifts during critical driving situations.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0892 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission
Difficulty
Type
Generic (SAE)
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