P1798: Output Speed Sensor 2 Circuit Range Performance

VOLKSWAGEN OTHER JAGUAR MAZDA NISSAN

Severity

Medium

System

Manufacturer-Specific Powertrain

Last reviewed: Jan 1, 0001 Last updated: Jan 1, 0001

Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.

Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).

Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.

What Does P1798 Mean?

P1798 is a manufacturer-specific diagnostic trouble code: Output Speed Sensor 2 Circuit Range Performance. This code applies to VOLKSWAGEN, OTHER, JAGUAR, MAZDA, NISSAN vehicles. Unlike generic OBD-II codes, manufacturer-specific codes are defined by the vehicle maker and may only apply to certain makes and models.

Symptoms of P1798

⚠️ Check Engine Light (MIL) illuminated
⚠️ Output Speed Sensor 2 not operating within expected parameters
⚠️ Reduced efficiency or performance of related system
⚠️ Reduced engine performance

Common Causes

🔍 Output Speed Sensor 2 degraded or contaminated
🔍 Mechanical wear or binding in Output Speed Sensor 2
🔍 Incorrect Output Speed Sensor 2 installed (wrong part number)
🔍 Related system mechanical issue affecting Output Speed Sensor 2 readings

Frequently Asked Questions

What does P1798 mean?

P1798 indicates: Output Speed Sensor 2 Circuit Range Performance. The vehicle's computer has detected that the Output Speed Sensor 2 is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1798?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1798 for extended periods may cause additional problems.

How much does it cost to fix P1798?

Repair costs for P1798 typically range from $50 to $250, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect and clean Output Speed Sensor 2
🔧 Replace degraded Output Speed Sensor 2
🔧 Check for related mechanical issues affecting readings

1
Find your vehicle above
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.