P1481 on Chevrolet
EATX RPM Pulse Performance
P1481 on Chevrolet vehicles indicates eatx rpm pulse performance. Au7o has documented this code across 1 Chevrolet model — most commonly on TrailBlazer. The PCM did not receive the expected transmission RPM pulse signal from the TCM/output speed source used to correlate engine and transmission speed. It commonly accompanies misfire-monitor disablement and shift quality complaints. Typical repair costs on Chevrolet range from $300 to $700, depending on the specific model and root cause.
Common Causes of P1481
- •Failed output or input speed sensor
- •Open or shorted RPM pulse wire between the TCM and PCM
- •Internal transmission wear producing implausible speed data
- •Corroded transmission connector
- •Failed transmission control module
P1481 on Chevrolet by Model
Chevrolet TrailBlazer(1 issue)
- Electric Fan Clutch Failure2002-2009
The TrailBlazer uses an electronically controlled viscous fan clutch that fails, causing overheating in traffic or when towing. A failed fan clutch can also cause excessive fan engagement, creating a loud roaring noise and reduced fuel economy.
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View P1481 across all makes →Frequently Asked Questions
What does P1481 mean on Chevrolet?▼
P1481 stands for "EATX RPM Pulse Performance." The PCM did not receive the expected transmission RPM pulse signal from the TCM/output speed source used to correlate engine and transmission speed. It commonly accompanies misfire-monitor disablement and shift quality complaints. On Chevrolet specifically, this code is documented across 1 model.
What causes P1481 on Chevrolet vehicles?▼
Common causes on Chevrolet: Failed output or input speed sensor, Open or shorted RPM pulse wire between the TCM and PCM, Internal transmission wear producing implausible speed data, Corroded transmission connector, Failed transmission control module. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1481 on a Chevrolet?▼
Repair costs on Chevrolet range from $300 to $700, depending on the specific model and root cause.
Which Chevrolet models have P1481 documented?▼
Au7o has documented P1481 on 1 Chevrolet model: TrailBlazer.