P1171 — 17 documented meanings by make
Documented by: AUDI, CHEVROLET (DAEWOO), CHEVROLET (USA), CITROEN, FORD, HONDA, ISUZU, JAGUAR, KIA, MAZDA, NISSAN, OPEL / VAUXHALL, PEUGEOT, SAAB, SEAT, SKODA, SSANGYONG, SUZUKI, VOLKSWAGEN, VOLVO — the meaning can differ between manufacturers
P1171 does not mean the same thing on every car — manufacturers reuse the number for different faults. 20 makes document it: Audi, Chevrolet (Daewoo), Chevrolet (USA), Citroen, Ford, Honda, Isuzu, Jaguar, Kia, Mazda, Nissan, Opel / Vauxhall, Peugeot, Saab, SEAT, Skoda, SsangYong, Suzuki, Volkswagen, Volvo. Find your make below.
| Make | Documented meaning | Points at |
|---|---|---|
| Audi | Angle sender 2 for throttle valve drive, G188, implausible signal | range or performance |
| SEAT | Angle sender 2 for throttle valve drive, G188, implausible signal | range or performance |
| Skoda | Angle sender 2 for throttle valve drive, G188, implausible signal | range or performance |
| Volkswagen | Angle sender 2 for throttle valve drive, G188, implausible signal | range or performance |
| Chevrolet (Daewoo) | Fuel trim system lean during power enrichment | |
| Chevrolet (USA) | Fuel trim system lean during power enrichment | |
| Citroen | Rotor sensor | |
| Citroen | Fuel shut-off solenoid circuit | |
| Citroen | EDC15C2 engine stop test by injector cut-off | fuel injector |
| Ford | Rotor sensor | |
| Ford | All cylinders combustion too lean | |
| Honda | Fuel system lean during acceleration | |
| Isuzu | Fuel system lean during acceleration | |
| Jaguar | System too lean - banks 1 and 2 (lean fuel fault) | |
| Kia | Throttle valve sticking | |
| Mazda | Rotor sensor | |
| Nissan | Inlet error | |
| Opel / Vauxhall | Fuel supply system lean during power enrichment | |
| Peugeot | Fuel Stepper Motor Malfunction | |
| Saab | Closed loop lean mixture | |
| Saab | Short term fuel trim, maximum value, air/fuel too lean | |
| SsangYong | Minimum drive pulse, MDP, learning on injector nr. 1 | fuel injector |
| Suzuki | Engine control unit, ECU, internal fault | control module |
| Volvo | Fuel adaptation, bank 1 |
P1171 on Audi, SEAT, Skoda, Volkswagen
On Audi, SEAT, Skoda, Volkswagen vehicles P1171 is documented as: Angle sender 2 for throttle valve drive, G188, implausible signal. P1171 is stored when the ECU sees range or performance on the circuit named in the code. That describes how the circuit is behaving, not which part has failed — the wiring, the connector and the component itself can all produce it, which is why the checks below start with the cheapest.
Usually one of: Sensor reading is inside its electrical range but does not match reality; Contamination or deposits changing what the sensor sees; A mechanical fault upstream that the sensor is correctly reporting; Sensor drifted with age without failing outright.
Check first, cheapest first:
- Compare the live value against a second sensor or a known-good figure — this code is about plausibility, not a dead circuit
- Look for the mechanical cause first: leaks, restrictions or wear that would genuinely produce this reading
- Clean the sensor if it is the type that fouls
- Check freeze-frame data to see under what conditions it triggered
- Replace the sensor only after the mechanical side is ruled out
Related Audi, SEAT, Skoda, Volkswagen codes:
P1171 on Jaguar
On Jaguar vehicles P1171 is documented as: System too lean - banks 1 and 2 (lean fuel fault). P1171 is stored when the ECU sees malfunction on the circuit named in the code. That describes how the circuit is behaving, not which part has failed — the wiring, the connector and the component itself can all produce it, which is why the checks below start with the cheapest.
Usually one of: Wiring or connector fault in the circuit; Component failed electrically; Supply or ground problem feeding the circuit; Controlling module fault, though this is the least common of the four.
Check first, cheapest first:
- Read all stored codes — a general fault code is often the symptom of a more specific one
- Inspect the connector and wiring for the named component
- Check supply and ground at the component
- Measure the component against specification
- Replace the component once wiring and supply are ruled out
Related Jaguar codes:
P1171 on Peugeot
On Peugeot vehicles P1171 is documented as: Fuel Stepper Motor Malfunction. P1171 is stored when the ECU sees malfunction on the circuit named in the code. That describes how the circuit is behaving, not which part has failed — the wiring, the connector and the component itself can all produce it, which is why the checks below start with the cheapest.
Usually one of: Wiring or connector fault in the circuit; Component failed electrically; Supply or ground problem feeding the circuit; Controlling module fault, though this is the least common of the four.
Check first, cheapest first:
- Read all stored codes — a general fault code is often the symptom of a more specific one
- Inspect the connector and wiring for the named component
- Check supply and ground at the component
- Measure the component against specification
- Replace the component once wiring and supply are ruled out
Related Peugeot codes:
P1171 on SsangYong
On SsangYong vehicles P1171 is documented as: Minimum drive pulse, MDP, learning on injector nr. 1. P1171 points at fuel injector. The standard definition names the system involved; which part inside it has actually failed is what the checks below establish, cheapest first.
Related SsangYong codes:
P1171 on Suzuki
On Suzuki vehicles P1171 is documented as: Engine control unit, ECU, internal fault. P1171 is stored when the ECU sees malfunction on control module. That describes how the circuit is behaving, not which part has failed — the wiring, the connector and the component itself can all produce it, which is why the checks below start with the cheapest.
Usually one of: Wiring or connector fault in the circuit; Component failed electrically; Supply or ground problem feeding the circuit; Controlling module fault, though this is the least common of the four.
Check first, cheapest first:
- Read all stored codes — a general fault code is often the symptom of a more specific one
- Inspect the connector and wiring for the named component
- Check supply and ground at the component
- Measure the component against specification
- Replace the component once wiring and supply are ruled out
Related Suzuki codes:
Which one is yours
A generic OBD reader gives you the number, not which of these meanings your manufacturer assigned to it. To get to the specific one:
- Use a brand-specific scanner — VCDS for VAG, INPA or ISTA for BMW, XENTRY for Mercedes, Forscan for Ford. It shows the manufacturer's own text rather than the generic one.
- Read all stored codes together — the neighbouring ones usually point at which system is involved and narrow the list.
- Check freeze-frame data: the RPM, temperature and load at the moment it triggered indicate which system was active.
- If you have no brand scanner, tell me the make and model below and I will tell you which of these applies to your car.
Code family
P1xxx is manufacturer-specific code (VW/Audi, BMW, Mercedes, Toyota etc. have different meanings for the same code number).
Severity
Manufacturer-specific codes need a brand scanner (VCDS for VAG, INPA for BMW, STAR for Mercedes).
That is what holds for P1171 in general. From here it depends on your engine — tell me which car it is and what it does, and I will give you the steps for it: real procedures, torque figures and diagrams instead of general advice.
Why TorqFix for your car?
Above is what the code means and why it appears. TorqFix goes further — it gives you specific procedures, torque values, wiring diagrams and pinouts for your exact engine, not generic steps for every car. Real workshop data (127,000+ diagrams, 10,000+ procedures), interpreted by AI in your language.
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Code breakdown
Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
The same code can mean different things on different makes. Match the meaning to your make before acting on it.
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