Intermediate Shaft Speed Sensor A Circuit Intermittent
The P0794 code means the vehicle's onboard diagnostic system has detected: Intermediate Shaft Speed Sensor A Circuit Intermittent. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $150 - $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.
Affiliate links — we earn a commission at no extra cost to you.
Common Symptoms
- Check Engine Light on
- Intermittent intermediate speed signal
- Shift quality degradation
- Transmission may enter limp mode
Probable Causes (Ranked by Likelihood)
- Loose intermediate shaft speed sensor A connection Very High
- Contaminated or degraded transmission fluid High
- Wiring or connector fault in the circuit Moderate
- TCM internal circuit failure Low
Frequently Asked Questions
What does P0794 indicate?
P0794 indicates a problem with the intermediate shaft speed sensor a circuit intermittent. This affects the transmission control module's ability to properly manage shift timing and quality.
Should I continue driving with this code?
You can drive short distances at reduced speeds, but the transmission may shift harshly or enter limp mode. Continued driving with transmission codes can lead to additional damage and more expensive repairs.
Is this an internal transmission problem?
Not necessarily. Many transmission codes are caused by external issues like wiring faults, sensor failures, or fluid condition. Proper diagnosis can often identify issues that can be repaired without opening the transmission.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Use a scan tool to monitor Intermediate Shaft Speed Sensor A data
-
Check transmission fluid level and condition
-
Inspect the transmission wiring harness and connector for damage or corrosion
-
Compare sensor readings to manufacturer specifications at various operating conditions
Sources 2
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)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Commonly Affected Vehicles
- 2010-2020 Ford F-150
- 2012-2019 Chevrolet Silverado
- 2011-2020 Toyota Camry
- 2009-2019 Honda Accord
Related Codes
Explore More
Was this helpful?
Send this to whoever is fixing the car — your mechanic, or the person asking what the light means.