What does fault code P22F3 mean?

The control module has detected a fault in the Cylinder 7 Alternative Fuel Fuel Injector Control Circuit High (P22F3). The signal is above the upper threshold, typically from an open circuit, poor connection, or a short to battery voltage. The fault is isolated to cylinder 7, positioned in the central engine thermal core. This directly impacts individual cylinder volumetric efficiency, firing synchronization, and dedicated harness branch loading. Measurements: • Cylinder 7 Injector – Coil Resistance (Resistance (Ω)): 11.5 - 15.5 Ω (port) / 0.5 - 3.0 Ω (direct injection) [Condition: Connector disconnected at 20°C (cylinder 7)] • Cylinder 7 Injector – Injection Pulse at 360° crank angle (Signal (ms)): 2.5 - 4.5 ms idle / 1.5 - 20 ms under load [Condition: Engine running] • Cylinder 7 Injector – Supply Voltage (Voltage (V)): 11.8 - 14.4 V (port) / up to 65 - 90 V boost (direct) [Condition: Ignition ON / engine running] Oscilloscope: Scope the control side for Cylinder 7 Injector. The trace must show pull-down to < 0.2 V at open, flat saturation, and an inductive spike (40 - 90 V) phase-offset to 360° crank angle. (Scale: 1 ms/div, 20 V/div)

What are the symptoms of fault code P22F3?

Sensor signal is pegged at the upper voltage limit (5 V / supply rail) Power hesitation and micro-misfires during hard acceleration under elevated thermal engine load. Check Engine Light (MIL) illuminated Possible drivability or power reduction Risk of failing an emissions inspection

What causes fault code P22F3?

Most likely: Open circuit on signal wire, spread terminal pin, or short to power feed at Cylinder 7 Alternative Fuel Fuel Injector Control Circuit High Cylinder 7 isolated routing: Dedicated harness branch degradation and individual manifold runner variation on cylinder 7. Likely: Chafed or pinched wiring harness along the signal path to Cylinder 7 Alternative Fuel Fuel Injector Control Circuit High Possible: Internal mechanical wear or carbon deposits inside Cylinder 7 Alternative Fuel Fuel Injector Control Circuit High Rare: Defective internal output driver or reference circuit in the control module for Cylinder 7 Alternative Fuel Fuel Injector Control Circuit High

How do you fix fault code P22F3?

Swap the component on cylinder 7 to cylinder 4 and clear DTCs to confirm if the fault follows the part. Measure signal terminal voltage with ignition ON and sensor unplugged to determine if ECM pull-up is active or harness is shorted to 12V. Verify loaded supply voltage and harness terminal pins at Cylinder 7 Alternative Fuel Fuel Injector Control Circuit High. Check circuit continuity and ground-side voltage drop (< 0.05 V) for Cylinder 7 Alternative Fuel Fuel Injector Control Circuit High. Perform fuel rail pressure-drop / balance test to identify leaking, stuck, or clogged injectors. Mechanic tip: Pair a current clamp with your voltage channel on the scope. The distinct dip in the current ramp marks the physical pintle lift — no dip means the coil is energized but the needle is mechanically seized.

Standard EOBD

P22F3 - Sylinder 7 Alternative Drivstoffinjektor – styrekrets høyt signal

Q: What are the symptoms of fault code P22F3?

Sensor signal is pegged at the upper voltage limit (5 V / supply rail) Power hesitation and micro-misfires during hard acceleration under elevated thermal engine load. Check Engine Light (MIL) illuminated Possible drivability or power reduction Risk of failing an emissions inspection

Q: What causes fault code P22F3?

Most likely: Open circuit on signal wire, spread terminal pin, or short to power feed at Cylinder 7 Alternative Fuel Fuel Injector Control Circuit High Cylinder 7 isolated routing: Dedicated harness branch degradation and individual manifold runner variation on cylinder 7. Likely: Chafed or pinched wiring harness along the signal path to Cylinder 7 Alternative Fuel Fuel Injector Control Circuit High Possible: Internal mechanical wear or carbon deposits inside Cylinder 7 Alternative Fuel Fuel Injector Control Circuit High Rare: Defective internal output driver or reference circuit in the control module for Cylinder 7 Alternative Fuel Fuel Injector Control Circuit High

Q: How do you fix fault code P22F3?

Swap the component on cylinder 7 to cylinder 4 and clear DTCs to confirm if the fault follows the part. Measure signal terminal voltage with ignition ON and sensor unplugged to determine if ECM pull-up is active or harness is shorted to 12V. Verify loaded supply voltage and harness terminal pins at Cylinder 7 Alternative Fuel Fuel Injector Control Circuit High. Check circuit continuity and ground-side voltage drop (< 0.05 V) for Cylinder 7 Alternative Fuel Fuel Injector Control Circuit High. Perform fuel rail pressure-drop / balance test to identify leaking, stuck, or clogged injectors. Mechanic tip: Pair a current clamp with your voltage channel on the scope. The distinct dip in the current ramp marks the physical pintle lift — no dip means the coil is energized but the needle is mechanically seized.

Relatert:Sylinder 7 Alternative Drivstoffinjektor, Ledningsnett og kontakter, Styreenhet (ECM/PCM)

System

Drivlinje (Motor og girkasse)

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Teknisk beskrivelse

Styreenheten registrerer en feil i Sylinder 7 Alternative Drivstoffinjektor (P22F3). Signalet ligger over øvre terskel, som regel på grunn av brudd, dårlig kontakt eller kortslutning mot spenning. Feilen er isolert til sylinder 7, plassert i motorens sentrale termiske kjerne. Dette påvirker sylinderens fyllingsgrad og tenningssynkronisering.

Multimeter Målepunkter & Nominelle Verdier

Målepunkt / Komponent	Måletype	Nominelt Målområde	Målevilkår
Sylinder 7 injektor – spolemotstand	Motstand (Ω)	11.5 - 15.5 Ω / 0.5 - 3.0 Ω	Frakoblet ved 20°C (sylinder 7)
Sylinder 7 injektor – pulsbredde ved 360° veivvinkel	Signal (ms)	2.5 - 4.5 ms tomgang	Motor i gang

Sylinder 7 injektor – spolemotstandMotstand (Ω)

Børverdi:11.5 - 15.5 Ω / 0.5 - 3.0 Ω

Frakoblet ved 20°C (sylinder 7)

Sylinder 7 injektor – pulsbredde ved 360° veivvinkelSignal (ms)

Børverdi:2.5 - 4.5 ms tomgang

Motor i gang

Oscilloskop Kurveformanalyse

1 ms/div, 20 V/div

Mål styresiden for Sylinder 7 injektor; spenningsfall ved åpning og induktiv spiss ved lukking.

Mulige årsaker

Brudd i signalledningen, løst kontaktpunkt eller kortslutning til pluss ved Sylinder 7 Alternative Drivstoffinjektor

Sylinder 7:Individuell ledningsgren og fyllingsgrad for sylinder 7.

Gnagd eller klemt ledningsnett fram til Sylinder 7 Alternative Drivstoffinjektor

Mekanisk slitasje eller sotbelegg i Sylinder 7 Alternative Drivstoffinjektor

Defekt driver eller referanseutgang i styreenheten for Sylinder 7 Alternative Drivstoffinjektor

Symptomer

Sensorsignalet ligger låst ved øvre spenningsgrense (5 V / matespenning)

Nøling og ujevn gange under hard akselerasjon med varm motor.

Motorlampe (MIL) lyser

Mulig redusert kjørbarhet eller effekt

Risiko for underkjent EU-kontroll

Anbefalt tiltak

Bytt komponenten på sylinder 7 over til sylinder 4 og slett feilkoden for å verifisere om feilen flytter seg.

Mål signalspenning med tenning PÅ og frakoblet sensor for å skille ECM pull-up fra kortslutning til 12V.

Sjekk matespenning og kontaktstykke ved Sylinder 7 Alternative Drivstoffinjektor.

Mål kontinuitet og jordspenningsfall (< 0.05 V) for Sylinder 7 Alternative Drivstoffinjektor.

Utfør trykkfallstest for å avdekke dryppende eller tette injektorer.

Mekanikerens tips

Bruk strømtang sammen med spenningsmåling på oscilloskopet. Knekkpunktet på strømkurven bekrefter fysisk nålløft.

Relaterte feilkoder

P2233

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P2212

NOx-sensor varmerføler – periodisk signal (Bank 1 sensor '1')

P226C

Ladetrykksregulering 'A' – treg respons

P2204

NOx-sensor – periodisk signal (Bank 1 sensor '1')

Målepunkt / Komponent

Måletype

Nominelt Målområde

Målevilkår

Sylinder 7 injektor – spolemotstand

Motstand (Ω)

11.5 - 15.5 Ω / 0.5 - 3.0 Ω

Frakoblet ved 20°C (sylinder 7)

Sylinder 7 injektor – pulsbredde ved 360° veivvinkel

Signal (ms)

2.5 - 4.5 ms tomgang

Motor i gang