Fault code P1158 – a step-by-step guide to diagnosing and fixing it

The meaning of error code P1158 – Lack Of HO2S22 Switch - Sensor Indicates Rich

P1158: Causes, signs and repairs

Error code P1158 is displayed and the check engine light is on - what does this mean?

The DTC P1158 is a manufacturer-specific fault code that is recognized by the OBD system and indicates a problem with the fuel pump control system or fuel pressure regulation. This trouble code mainly occurs in vehicles from certain manufacturers and can have different meanings depending on the brand.

What causes can this error code have?

Defective fuel pump or fuel pump relay
Damaged or clogged fuel filter system
Faulty fuel pressure sensors
Loose or corroded plug connections in the fuel system
Defective fuel pressure regulation
Damaged cable connections to the fuel pump
Clogged fuel lines
Faulty engine control unit software

What symptoms occur in parallel with fault code P1158?

Starting problems: The vehicle is difficult to start or does not start at all
Loss of power: Noticeable reduction in engine power while driving
Irregular idling: Engine runs unevenly or stutters when idling
Fuel consumption: Increased consumption due to inefficient fuel supply
Jerking: Vehicle jerks especially when accelerating or under load
Stalling: Engine stalls while driving or when stationary

How can the problem with error code P1158 be rectified?

Correction requires a systematic diagnosis of the fuel system and appropriate repair measures.
Check the fuel pump and fuel pump relay and replace completely if defective, including checking the electrical connections
Replace the fuel filter and check the entire fuel line system for blockages and clean it
Test the fuel pressure sensor with a multimeter and replace with a new sensor if the readings are incorrect
Clean all plug connections in the fuel system, check for corrosion and treat with contact spray
Remove fuel pressure regulator, test and replace with new part if malfunctioning
Check wiring harness to fuel pump for damage and repair defective areas or replace cable
Update the engine control unit software or perform a reset and delete the fault memory

FAQ - Frequently asked questions about DTC P1158

Can I continue driving with error code P1158?

It is not advisable to continue driving with the code P1158, as fuel system problems can lead to sudden engine failure. You should visit a workshop at the first symptoms.

How much does it cost to repair error code P1158?

The repair costs vary between 150-800 euros, depending on the cause. A fuel filter costs around 50-150 euros, while a new fuel pump can cost 300-600 euros.

Is error code P1158 the same for all vehicle brands?

No, P1158 is a manufacturer-specific code and can have different meanings depending on the brand. The exact definition depends on the respective vehicle manufacturer.

Can I repair error code P1158 myself?

Simple work such as changing the fuel filter is possible, but more complex repairs to the fuel system should be carried out by specialists, as fuel is a fire hazard.

How often does error code P1158 occur?

The eobd code P1158 is relatively rare and mainly occurs in older vehicles or if the fuel system has not been properly maintained.

Can bad fuel cause error code P1158?

Yes, contaminated or poor quality fuel can clog fuel filters and damage pumps, which can lead to this fault code.

Vehicles in which fault code P1158 occurs most frequently

Fault code P1158 is a manufacturer-specific DTC and can indicate various fuel system problems, but is most common in the following vehicles:

Volkswagen: Golf, Passat, Polo, Jetta (1998-2010)
Audi: A3, A4, A6, TT (1999-2008)
SEAT: Ibiza, Leon, Cordoba, Toledo (2000-2009)
Škoda: Octavia, Fabia, Superb (2001-2010)
Ford: Focus, Fiesta, Mondeo (2002-2012)
Opel: Astra, Corsa, Vectra, Zafira (2003-2011)
BMW: 3 Series, 5 Series, X3, X5 (2004-2013)
Mercedes-Benz: C-Class, E-Class, A-Class (2005-2014)
If the code P1158 occurs in your vehicle, you should first determine the manufacturer-specific meaning and then have a systematic diagnosis of the fuel system carried out. As these are safety-relevant components, we recommend a visit to a specialist workshop to prevent further damage to the engine and ensure the fuel system is functioning properly.

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