P1124: Throttle Position Sensor Signal Out Of Self Test Range

MAZDA VOLKSWAGEN FORD LINCOLN MERCURY OTHER KIA SUBARU

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 P1124 Mean?

P1124 is a manufacturer-specific diagnostic trouble code: Throttle Position Sensor Signal Out Of Self Test Range. This code applies to MAZDA, VOLKSWAGEN, FORD, LINCOLN, MERCURY 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 P1124

⚠️ Check Engine Light (MIL) illuminated
⚠️ Abnormal signal from Throttle Position Sensor
⚠️ Related system may operate erratically
⚠️ Reduced engine performance

Common Causes

🔍 Throttle Position Sensor producing abnormal signal
🔍 Electromagnetic interference affecting Throttle Position Sensor signal
🔍 Wiring issue distorting Throttle Position Sensor signal

Frequently Asked Questions

What does P1124 mean?

P1124 indicates: Throttle Position Sensor Signal Out Of Self Test Range. The vehicle's computer has detected that the Throttle Position Sensor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1124?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1124 for extended periods may cause additional problems.

How much does it cost to fix P1124?

Repair costs for P1124 typically range from $80 to $300, 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 Throttle Position Sensor and related wiring
🔧 Replace faulty Throttle Position Sensor

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.