P2893 moderate

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.

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Keep driving?: Short distances only
DIY difficulty: hard
Estimated cost: $300 - $1,200 (parts and labor)

Check Your Fluid First

ANCEL AD310 OBD-II Scanner

Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.

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Read Transmission Codes

LAUNCH CRP123X (Reads All Systems)

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

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

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.