P2881 moderate

Transmission Output Speed Sensor B Circuit

The P2881 code means the vehicle's onboard diagnostic system has detected: Transmission Output Speed Sensor B 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 output speed sensor B operation
Transmission shifting irregularly
Check Engine Light on
Possible transmission overheating

Probable Causes (Ranked by Likelihood)

Faulty output speed sensor B Very High
Wiring damage in output speed sensor B 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 output speed sensor B operation
Inspect wiring and connectors for damage
Monitor output speed sensor B parameters with scan tool

Frequently Asked Questions

What is the output speed sensor B?

The output speed sensor B 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.