P1481 on 2002-2009 Chevrolet TrailBlazer — EATX RPM Pulse Performance
1 vehicles · 1 makes · $300-$700 repair
Most Reported On
P1481 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2002-2009 Chevrolet TrailBlazer, with repair costs ranging from $300 to $700.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
P1481 does not use the standard P/B/C/U prefix. It may be a manufacturer-specific code, so verify that a scanner supports your exact year, model and module before buying.
FAQ
What does P1481 mean?
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.
What are the most common causes of P1481?
The most common causes of P1481 are: 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. The specific cause varies by vehicle.
How much does it cost to fix P1481?
Repair costs for P1481 range from $300 to $700, depending on the vehicle and root cause.
Which vehicles are affected by P1481?
Au7o has documented P1481 across 1 vehicle models from 1 manufacturers: Chevrolet.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.