P0120 on Renault: How to Diagnose & Fix
Throttle/Pedal Position Sensor Circuit Malfunction
1 Renault model · 1 documented issue · $100-$500 repair
P0120 on Renault by model: symptoms, diagnosis and fix
The Megane displays an "Injection Fault" warning on the dashboard, which can be triggered by numerous sensors and components. Common causes include the crankshaft position sensor, throttle body, and fuel pressure regulator.
Common Symptoms
- Injection fault warning
- Engine stalling
- Difficult starting
- Loss of power
How to Fix
Diagnose with Renault CLIP or compatible diagnostic tool to identify the specific fault code. Common fixes include crankshaft sensor replacement, throttle body cleaning, and fuel pressure regulator replacement.
Sources for this issue (1)
P0120 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0120 mean on a Renault?
P0120 stands for "Throttle/Pedal Position Sensor Circuit Malfunction." This code indicates a malfunction in the throttle position or accelerator pedal position sensor circuit. These sensors tell the computer how far the throttle plate is open or how far you've pressed the pedal, which the computer uses to control engine power and, on drive-by-wire systems, the throttle itself. When the signal is out of range, erratic, or doesn't make sense relative to other inputs, P0120 sets. Symptoms can include hesitation, surging, stalling, or the vehicle entering a reduced-power 'limp' mode for safety. On Renault it is documented across 1 model: Megane.
What are the most common causes of P0120?
The most common causes of P0120 are: Failed throttle position sensor, Corroded or loose TPS/pedal sensor connector, Damaged or shorted sensor wiring, Carbon buildup or a sticking throttle body, Worn throttle body or throttle plate, Poor sensor reference voltage or ground, Faulty accelerator pedal position sensor, Faulty PCM/ECM (rare). The specific cause varies by vehicle.
How much does it cost to fix P0120 on a Renault?
Published repair estimates on Renault range from $100 to $500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0120 on a different make?
View P0120 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.