Transmission Gear Ratio Monitoring Circuit
The P2893 code means the vehicle's onboard diagnostic system has detected: Transmission Gear Ratio Monitoring Circuit. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $300 - $1,200 (parts and labor)
Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.
Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.
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Common Symptoms
- Abnormal gear ratio monitoring system operation
- Transmission shifting irregularly
- Check Engine Light on
- Possible transmission overheating
Probable Causes (Ranked by Likelihood)
- Faulty gear ratio monitoring system Very High
- Wiring damage in gear ratio monitoring system circuit High
- Contaminated or low transmission fluid Moderate
- TCM internal malfunction Low
Frequently Asked Questions
What is the gear ratio monitoring system?
The gear ratio monitoring system is a component within the transmission system that helps manage shift quality and overall transmission operation.
Can I drive with this code?
Short distance driving may be possible at reduced speeds, but have it diagnosed soon to prevent further damage.
Is this expensive to fix?
Repair costs depend on whether the issue is wiring, a sensor, or internal component failure. Wiring repairs are typically under $500, while internal repairs can exceed $1,000.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Scan for DTCs and review freeze frame data
-
Test gear ratio monitoring system operation
-
Inspect wiring and connectors for damage
-
Monitor gear ratio monitoring system parameters with scan tool
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Commonly Affected Vehicles
- 2010-2020 Toyota Camry
- 2012-2019 Honda Accord
- 2014-2020 Nissan Altima
- 2013-2020 Subaru Outback
Related Codes
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