P0190 on Audi
Fuel Rail Pressure Sensor Circuit Malfunction
P0190 on Audi vehicles indicates fuel rail pressure sensor circuit malfunction. Au7o has documented this code across 1 Audi model — most commonly on TT. 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 Audi range from $150 to $6,000, 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 Audi by Model
Audi TT(1 issue)
- Cam Follower Wear (Damages Camshaft and HPFP)2008-2014
The 2.0 TFSI engine in the Mk2 TT (2008-2015, particularly 2008-2009 base and 2009-2014 TTS) uses a cam follower (bucket tappet) that rides on the camshaft to drive the high-pressure fuel pump (HPFP). This follower is a wear item that can get completely ground down over time, typically by 60,000-100,000 miles. When the follower wears through, it damages the camshaft lobe and HPFP, causing catastrophic engine damage requiring camshaft replacement ($2,000-$3,000), HPFP replacement ($800-$1,500), and potentially complete cylinder head rebuild ($4,000-$6,000). Symptoms include loss of power, rough running, metallic ticking, and fuel pressure faults. This is a KNOWN DEFECT requiring preventive inspection and replacement.
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What does P0190 mean on Audi?▼
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 Audi specifically, this code is documented across 1 model.
What causes P0190 on Audi vehicles?▼
Common causes on Audi: 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 Audi?▼
Repair costs on Audi range from $150 to $6,000, depending on the specific model and root cause.
Which Audi models have P0190 documented?▼
Au7o has documented P0190 on 1 Audi model: TT.