P1240 on SEAT
Manufacturer-Specific Injector / Fuel System Circuit Fault
P1240 on SEAT vehicles indicates manufacturer-specific injector / fuel system circuit fault. Au7o has documented this code across 1 SEAT model — most commonly on Ibiza. P1240 is a manufacturer-specific powertrain code, generally associated with a fuel injector or fuel-system circuit fault, though the exact assignment differs by manufacturer. On several platforms it indicates a problem in a specific cylinder's injector circuit (often referenced as cylinder 4) or a related fuel-control/power-supply issue. A fault here can disrupt precise fuel delivery and lead to rough idle, misfire, and reduced performance. Confirm the exact meaning with make-and-model service information. Typical repair costs on SEAT range from $300 to $1,800, depending on the specific model and root cause.
Common Causes of P1240
- •Faulty or open fuel injector (cylinder-specific)
- •Wiring, connector, or harness fault in the injector circuit
- •Injector power-supply or ground problem
- •Corroded or loose electrical connections
- •Faulty injector driver in the PCM/ECM
- •Fuel-system pressure or delivery fault (some makes)
- •Internal PCM/ECM fault
P1240 on SEAT by Model
SEAT Ibiza(1 issue)
- Ibiza / Leon 1.6 TDI Common-Rail Injector Failure2009-2020
The 1.6 TDI common-rail engine in Ibiza Mk4/5, Leon Mk2/3 (and across VW Group small diesels) suffers Bosch injector failure typically at 100,000-180,000 km. Symptoms: rough cold start, individual-cylinder misfire, sometimes back-leak overwhelming the rail pressure regulator. Injector copper washers often re-seal poorly after the first removal.
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View P1240 across all makes →Frequently Asked Questions
What does P1240 mean on SEAT?▼
P1240 stands for "Manufacturer-Specific Injector / Fuel System Circuit Fault." P1240 is a manufacturer-specific powertrain code, generally associated with a fuel injector or fuel-system circuit fault, though the exact assignment differs by manufacturer. On several platforms it indicates a problem in a specific cylinder's injector circuit (often referenced as cylinder 4) or a related fuel-control/power-supply issue. A fault here can disrupt precise fuel delivery and lead to rough idle, misfire, and reduced performance. Confirm the exact meaning with make-and-model service information. On SEAT specifically, this code is documented across 1 model.
What causes P1240 on SEAT vehicles?▼
Common causes on SEAT: Faulty or open fuel injector (cylinder-specific), Wiring, connector, or harness fault in the injector circuit, Injector power-supply or ground problem, Corroded or loose electrical connections, Faulty injector driver in the PCM/ECM. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1240 on a SEAT?▼
Repair costs on SEAT range from $300 to $1,800, depending on the specific model and root cause.
Which SEAT models have P1240 documented?▼
Au7o has documented P1240 on 1 SEAT model: Ibiza.