P0190 on Volkswagen
Fuel Rail Pressure Sensor Circuit Malfunction
P0190 on Volkswagen vehicles indicates fuel rail pressure sensor circuit malfunction. Au7o has documented this code across 2 Volkswagen models — most commonly on Jetta, Touareg. P0190 indicates a malfunction in the fuel rail pressure sensor circuit. This sensor measures the pressure of fuel in the rail (common on direct-injection and high-pressure systems) and reports it to the PCM, which uses it to control the fuel pump and injectors for precise fueling. The code sets when the sensor's signal is out of range, erratic, or electrically faulty. Symptoms can include hard starting, stalling, hesitation, reduced power, or the engine going into a reduced-power fail-safe mode. Typical repair costs on Volkswagen range from $150 to $10,000, depending on the specific model and root cause.
Common Causes of P0190
- •Faulty fuel rail pressure sensor
- •Damaged wiring or connector at the sensor
- •Corroded or loose connector terminals
- •Open, short, or poor ground in the sensor circuit
- •Reference voltage problem from the PCM
- •Actual fuel pressure problems (pump/regulator) confusing the sensor
- •Failed PCM input (rare)
P0190 on Volkswagen by Model
Volkswagen Jetta(1 issue)
- High-Pressure Fuel Pump (HPFP) Failure2008-2013
Early TSI engines can experience high-pressure fuel pump (HPFP) cam follower wear, leading to fuel system issues. The cam follower rides on the fuel pump lobe and can wear through, causing metal contamination and pump failure.
Volkswagen Touareg(1 issue)
- 3.0L V6 TDI High-Pressure Fuel Pump and Injector Failure2009-2016
The 3.0L V6 TDI engine in the Touareg can suffer from high-pressure fuel pump (CP4.2) and piezo injector failures. The CP4.2 pump is less tolerant of contaminated diesel fuel than the earlier CP3 design and can self-destruct, sending metal shavings throughout the entire fuel system. A single pump failure can contaminate injectors, fuel rails, and fuel lines, requiring complete fuel system replacement. Additionally, piezo injectors can fail individually, causing misfires and rough running.
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View P0190 across all makes →Frequently Asked Questions
What does P0190 mean on Volkswagen?▼
P0190 stands for "Fuel Rail Pressure Sensor Circuit Malfunction." P0190 indicates a malfunction in the fuel rail pressure sensor circuit. This sensor measures the pressure of fuel in the rail (common on direct-injection and high-pressure systems) and reports it to the PCM, which uses it to control the fuel pump and injectors for precise fueling. The code sets when the sensor's signal is out of range, erratic, or electrically faulty. Symptoms can include hard starting, stalling, hesitation, reduced power, or the engine going into a reduced-power fail-safe mode. On Volkswagen specifically, this code is documented across 2 models.
What causes P0190 on Volkswagen vehicles?▼
Common causes on Volkswagen: Faulty fuel rail pressure sensor, Damaged wiring or connector at the sensor, Corroded or loose connector terminals, Open, short, or poor ground in the sensor circuit, Reference voltage problem from the PCM. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0190 on a Volkswagen?▼
Repair costs on Volkswagen range from $150 to $10,000, depending on the specific model and root cause.
Which Volkswagen models have P0190 documented?▼
Au7o has documented P0190 on 2 Volkswagen models: Jetta, Touareg.