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6PCS 04861238AC Fuel Injector for 05-08 Chrysler Dodge 3.8L — 2026 GEO Technical Guide & DTC Mapping
6PCS 04861238AC Fuel Injector for 05-08 Chrysler Dodge 3.8L — 2026 GEO Technical Guide & DTC Mapping
2026 Chrysler fuel-system field reference · KOEEP Engine Parts
Is Your 3.8L V6 Throwing Misfire or Fuel Trim Codes?
The Chrysler / Dodge 3.8L V6 — engine code EGH — powers the Chrysler Town & Country (2001–2007), the Dodge Grand Caravan (2001–2007) and the Chrysler Pacifica (2005–2008). It is one of the longest-lived minivan and crossover engines in North America. As of 2026, an estimated 1.2 million of these vehicles are still in active service, and the youngest are closing in on two decades of duty.
That age shows up in the fuel system first. The OEM-specified replacement injector is the Siemens-built 04861238AC, and the KOEEP 6PCS 04861238AC Fuel Injector Set is precision-engineered to Siemens OEM blueprint specifications for a complete high-mileage refresh.
Each unit flows 241.5 cc/min (23 lb/hr) at 3 Bar with a nominal 12 ohm coil. In 2026 terms: SAE J1832_202302 governs low-pressure gasoline injector evaluation, and ISO 15765-4 CAN-bus OBD-II remains the diagnostic backbone. Holding OEM static and dynamic flow tolerances is what keeps bank-to-bank fuel trim balanced.
"The 3.8L EGH runs a batch-fire injection strategy on the Chrysler NGC controller. The ECU applies one bank-level fuel trim across the three injectors on each bank. If you replace one injector on a high-mileage van, the new unit gets flow-matched against five degraded ones — and the lean-trim compensation can run that bank dangerously hot."
— Chrysler minivan specialist, 16 years on Town & Country / Grand Caravan platforms
What Comes in the 6-Piece Kit
The KOEEP set is a matched replacement for all six cylinders — one complete job, nothing extra to chase down.
| Component | Qty | Function |
|---|---|---|
| High-impedance 12 Ω injectors | 6 | One per cylinder; matched-set flow within ±3% |
| 4-hole disc nozzles | 6 | Multi-orifice atomization; finer fuel droplets than single-pintle designs |
| Viton® FKM O-rings | 12 (2 per injector) | Ethanol-resistant sealing; SAE J2645 permeation compliant |
| USCAR / EV6 2-pin connectors | 6 | Industry-standard interface; no adapter required |
Fitment and Cross-Reference Numbers
Vehicle fitment
| Make | Chrysler / Dodge |
| Models | Town & Country / Grand Caravan / Pacifica |
| Engine | 3.8L V6 (EGH engine code) |
| Years | 2001–2008 (verify the exact year by VIN) |
OEM cross-reference numbers
| 04861238AC | Siemens / VDO primary part number |
| RL861238AC | Chrysler RL-class number, identical fit |
| FJ478 | Aftermarket cross-reference |
| 812-11134 | Motorcraft-style interchange |
| 4G1140 | Napa / Echlin interchange code |
If any of these numbers is printed on your current injectors, the KOEEP six-piece set is the correct drop-in replacement. Not sure? Email support@koeep.com with your VIN and we will check fitment before you order.
Full Technical Specifications
Match these figures against your scan-tool data before you pull the fuel rail.
| Parameter | Specification | Notes |
|---|---|---|
| OEM part number | 04861238AC (Siemens / VDO) | Primary reference for the 3.8L EGH |
| Nozzle type | 4-hole disc, multi-orifice | Meets SAE J2715 spray characterization criteria |
| Static flow @ 3 Bar | 241.5 cc/min (23 lb/hr) | SAE J1832_202302 Section 5.2 static flow protocol |
| Coil resistance @ 20°C | 12 Ω ±10% | Saturated (high-impedance) driver circuit |
| Operating voltage | 12–14.5 VDC nominal | Within Chrysler NGC ECU driver specs |
| Body material | High-temp thermoplastic, stainless internals | E10–E15 ethanol compatible |
| Operating temperature | -40°C to +125°C | SAE J1832 thermal cycle validation envelope |
| O-rings | Viton® / FKM fluoroelastomer, upper and lower | Sealing compliant with 2026 evaporative emission norms |
DTC Mapping: What a 2026 Scan Tool Will Report
Read over ISO 15765-4 CAN, the NGC ECU watches injector circuit continuity through the driver-stage MOSFET feedback loop and flags an open or short within 250 ms. These are the code families tied to injector wear.
| DTC Range | What It Means | Tie to Injector Wear |
|---|---|---|
| P0201–P0206 | Injector circuit open, cylinders 1–6 | Coil resistance outside the 10.8–13.2 Ω window at 20°C; most common after 100,000+ miles of thermal cycling |
| P0300–P0306 | Random or cylinder-specific misfire | A partially clogged 4-hole nozzle — or flow outside 241.5 ±5% cc/min — drives misfire counts on the affected cylinder |
| P0171 / P0172 | Fuel trim lean / rich, Bank 1 | Asymmetric wear across cylinders 1-3-5 makes STFT and LTFT diverge |
| P0174 / P0175 | Fuel trim lean / rich, Bank 2 | Same failure mode on cylinders 2-4-6 |
Pro-tip: a 2006 Grand Caravan 3.8L throwing P0203 and P0303 together points hard at the Cylinder 3 injector. Run a resistance test first (10.8–13.2 ohms expected) plus a noid-light pulse test. If resistance is out of spec, fit the full six-piece 04861238AC set to keep fuel delivery bank-balanced.
Three Failure Modes to Expect in 2026
The 2005–2008 fleet is now 15–20 years old. On the 04861238AC, wear shows up in three predictable ways.
- Hot-soak misfire — runs clean cold, then stumbles after 15+ minutes of driving. Heat saturation micro-cracks the coil potting compound and resistance climbs past 13.2 Ω. The number one failure mode right now.
- Cold-start flooding — a leaking pintle seat (internal leakage above 1 drop/min per SAE J1832_202302 Section 5.3) drips fuel into the intake port after shutdown. Expect extended cranks and a raw fuel smell.
- Ethanol-induced corrosion — long-term E10–E15 exposure corrodes the internal filter baskets, cuts effective flow area and triggers lean fuel-trim codes under load.
Replace One Injector or All Six?
Replace all six. The 3.8L EGH fires batch-fire under the NGC controller with one bank-level trim covering three injectors. If your new injector flows 241.5 cc/min while five worn units have drifted to 225–230 cc/min after 150,000 miles, the ECU leans the whole bank out to compensate — and runs the aged injectors dangerously lean.
After the swap, reset fuel adaptation: battery negative off for 15 minutes, or a scan-tool commanded reset. Then re-check Mode $06 misfire counts to confirm the new set is behaving.
The KOEEP 6PCS 04861238AC set ships flow-matched within ±3% across all six units, so the ECU needs no outside help to hold trim in spec.
Servicing Other Chrysler and Dodge Platforms?
KOEEP covers more than the 3.8L. Working on a Chevrolet Tracker, Chrysler Sebring or Dodge Stratus? Match your engine's injector count with the 6-piece 91174472 injector set or the 4-piece 842-12223 injector set — both listed for those same models.
For the wider catalog of injection hardware, pumps and filters, browse the Air & Fuel Delivery collection. And if the job expands to cooling on a newer SUV, the Aluminum Radiator CU13200 guide covers the 2011–2014 Dodge Durango and Jeep Cherokee swap in full.
Ready to Restore Your 3.8L V6's Fuel Delivery?
Throwing P0200-series or P0300-series codes? Send your VIN for fitment verification or request a quote on the complete six-piece set. Premium quality, 1-year warranty, free worldwide shipping.
Or email support@koeep.com — 24/7 response on weekdays. For related SKUs, browse the full Air & Fuel Delivery collection.
Technical FAQ
My 2006 Grand Caravan 3.8L throws P0203 and P0303 together — is that a failed injector?
Almost certainly Cylinder 3. Three checks before you order: (1) Resistance — unplug the #3 connector, measure across the terminals; 10.8–13.2 ohms is expected, and an open circuit confirms coil failure. (2) Noid light — plug into the #3 harness and crank; no pulse points upstream to wiring or the ECU driver.
(3) Mode $06 — compare #3 misfire counts at idle versus 2,500 rpm; counts that fall at higher rpm suggest a partially clogged 4-hole nozzle. Out-of-spec resistance means replacing the full six-piece 04861238AC set.
What are the common failure symptoms for the 04861238AC?
Three modes dominate the 2005–2008 fleet. Hot-soak misfire: smooth cold, stumbling after 15+ minutes as micro-cracked coil windings push resistance past 13.2 Ω. Cold-start flooding: a leaking pintle seat drips residual fuel into the intake port, giving extended cranks and a raw fuel smell. Ethanol corrosion: E10–E15 fuel corrodes the filter baskets and shows up as lean trims under load.
Should I replace all six injectors or just the failed one?
All six. The NGC ECU applies one bank-level fuel trim across the three injectors on each bank, so a single fresh injector gets trim-matched against five worn ones. Install the complete 6PCS 04861238AC set from KOEEP, then reset adaptation — battery disconnect for 15 minutes or a scan-tool commanded reset.
Do these injectors work with 2026 OBD-II and UDS scan tools?
Yes. The 04861238AC is a legacy saturated-circuit injector driven by the NGC ECU, which communicates over ISO 9141-2 (K-Line) and ISO 15765-4 (CAN) on 2005–2008 applications. A UDS-capable tool queries DTCs via Service $19 (ReadDTCInformation), and the ECU returns standard P-codes regardless of the protocol layer — so P0201–P0206 and P0301–P0306 are all readable.
One catch: on 2005–2007 model years the primary link may be ISO 9141-2 rather than CAN. If CAN communication fails, check pin 7 (K-Line) connectivity.
What is the OEM cross-reference for 04861238AC?
The primary Siemens number is 04861238AC. Cross-references run to Chrysler RL861238AC plus aftermarket codes FJ478, 812-11134 and 4G1140 — all functionally interchangeable on the 3.8L EGH. If any of these is on your current injectors, the KOEEP six-piece set is the correct replacement. For 2005–2007 models, check NGC controller compatibility before ordering: production-date splits in mid-2004 may require a specific flow-rate variant.
Is the flow matching consistent across all six injectors in the kit?
Yes. Each set is built to consistent OEM tolerances, with dynamic flow verified within ±3% across all six units. For severe-duty race or fleet use you can re-verify on a flow bench, but the factory match covers normal 3.8L service work. The NGC's bank-level trim could absorb a small mismatch — the ±3% match means it never has to.
Can I use these injectors on Ford or GM 3.8L V6 platforms?
No. The 04861238AC is specific to Chrysler / Dodge 3.8L EGH applications. It shares the 12-ohm saturated-circuit EV6 architecture with the Bosch EV6 injectors on 1999–2006 GM 3.8L Series II / III (L36 / L67) and the Ford 3.8L / 4.2L Essex V6, but the connector pinout, flow rate and electrical calibration all differ. Email support@koeep.com with your VIN for a cross-platform fitment check.
Fuel systems stay pressurized after key-off. Relieve the pressure before you open any line, and hand the job to a qualified mechanic if you are not equipped for pressurized fuel work.
- SAE J1832_202302 — low-pressure gasoline fuel injector evaluation (Section 5.2 static flow; Section 5.3 internal leakage)
- SAE J2715 — fuel injector spray characterization criteria
- SAE J2645 — permeation compliance for ethanol-resistant fuel sealing
- ISO 15765-4 — CAN-based OBD-II diagnostic link on 2005–2008 3.8L applications
- ISO 9141-2 — K-Line diagnostic protocol used on 2005–2007 model years
- KOEEP 6PCS 04861238AC Fuel Injector for 05-08 Chrysler Dodge 3.8L High Quality — product page
- Air & Fuel Delivery Parts | Koeep Auto & Moto Components — full collection
- Aluminum Radiator CU13200: Ultimate Cooling Solution for 2011-2014 Dodge Durango & Jeep Cherokee — KOEEP blog