Fuel Delivery

Tank to injector tip — lift pump, filter, high-pressure pump, rail, regulator and injectors. On direct-injection and diesel systems the pressures involved are extreme, which makes both the diagnostic care and the failure consequences greater than on older port-injected engines.

902 códigos · 22 componentes · 15 parámetros en vivo

Seguir

WhatsApp Telegram X Correo electrónico

Componentes

Parámetros en vivo que conviene vigilar

PID	Parámetro	Unidad	Conversión
01:03	Fuel system status Whether fuelling is running open-loop or closed-loop, per bank. Open loop means the module is ignoring the oxygen sensors and using a fixed map — expected when cold, a fault when warm.	—	Bit-encoded
01:06	Short term fuel trim — Bank 1 The module's immediate fuelling correction, moving constantly as the oxygen sensor switches. Positive means it is adding fuel to correct a lean condition. Read alongside long term trim — short term swinging while long term sits high tells a different story from both being high.	%	(A / 1.28) − 100
01:07	Long term fuel trim — Bank 1 The learned, persistent correction the module has settled on. This is the parameter behind P0171 and P0172, and the one worth comparing at idle versus higher load: a vacuum leak drives it strongly positive at idle and less so under load, while a fuel delivery problem does the reverse.	%	(A / 1.28) − 100
01:08	Short term fuel trim — Bank 2 Bank 2's immediate correction. Comparing the two banks is the fastest way to separate a bank-specific fault from a shared one.	%	(A / 1.28) − 100
01:09	Long term fuel trim — Bank 2 Bank 2's learned correction. Both banks drifting together points at the airflow sensor, fuel pressure or the evaporative system; one bank alone points at that bank's injectors, gasket or sensor.	%	(A / 1.28) − 100
01:0A	Fuel pressure Gauge fuel pressure, where a sensor is fitted. Coarse resolution compared with the dedicated rail pressure PIDs, and absent on many vehicles.	kPa	A × 3
01:22	Fuel rail pressure relative to manifold Rail pressure measured relative to manifold vacuum, which is what actually determines injector flow. More diagnostically meaningful than absolute pressure on port-injected engines.	kPa	0.079 × ((256 × A) + B)
01:23	Fuel rail gauge pressure Rail pressure for direct injection and diesel systems, where pressures run far higher. Compare commanded against actual across the load range — that comparison is the core of diagnosing P0087 and P0088.	kPa	10 × ((256 × A) + B)
01:2F	Fuel tank level input Fuel level as a percentage. More than a gauge reading — several monitors are inhibited when the tank is very low or very full, which is why some faults will not reproduce until the level is right.	%	A × 100 / 255
01:44	Commanded air-fuel equivalence ratio Target mixture expressed as lambda, where 1.0 is stoichiometric. Reading the target alongside what the wideband sensor actually reports is how you tell a fuelling problem from a sensor problem.	λ	((256 × A) + B) × 2 / 65536
01:51	Fuel type Declared fuel type. Worth confirming on flexible-fuel and dual-fuel vehicles, since it changes which monitors run and what mixture targets apply.	—	Enumerated
01:52	Ethanol fuel percentage Measured ethanol content. A value that never changes after refuelling with a different blend indicates the composition sensor has stopped responding.	%	A × 100 / 255
01:59	Fuel rail absolute pressure Absolute rail pressure on high-pressure systems. The parameter to watch when diagnosing the P0087 to P0094 group, and the one to compare against an independent gauge when a drifting sensor is suspected.	kPa	10 × ((256 × A) + B)
01:5D	Fuel injection timing When injection occurs relative to top dead centre. On a diesel this governs combustion noise, emissions and peak cylinder pressure, so a deviation is heard as much as measured.	°	(((256 × A) + B) / 128) − 210
01:5E	Engine fuel rate Instantaneous fuel consumption. Comparing this against expected consumption at a known load is a quick way to confirm that a suspected rich condition is real rather than inferred from trim values.	L/h	((256 × A) + B) / 20

Códigos de falla

Crítica 2

Alta 300

Moderada 182

Baja 11

Información, no instrucciones

CarGeek es una obra de referencia, no un manual de taller. Sus páginas se escriben a partir de fuentes públicas y de lo que otras personas han comprobado, nunca a partir de la documentación de servicio del fabricante, de modo que pueden ser incorrectas o incompletas para su vehículo concreto. Parte de lo que describen entraña un riesgo real: alta tensión, combustible a presión, energía acumulada y piezas calientes o en movimiento.

Antes de actuar sobre cualquier indicación, hágala verificar por una persona con formación técnica siguiendo el procedimiento propio del fabricante para su vehículo. Nada de lo que hay aquí sustituye ese procedimiento.

Trabajando en este sistema

Sé el primero en documentarlo

Todavía no se ha publicado nada sobre esto. Todo lo que haya encontrado vale la pena anotarlo — incluso un callejón sin salida le ahorra a alguien esa misma tarde.

Lo que hace que valga la pena leerlo:

El coche — marca, modelo, año y motor. La misma avería se comporta distinto en cada uno.
Lo que mediste, no solo lo que cambiaste.
Qué lo solucionó de verdad — o que nada lo hizo, que también conviene saber.

Iniciar sesión o crear una cuenta para agregar lo que encontró sobre Fuel Delivery.