MazicBay Diagnostics
MAZICBAYDiagnostics
Lookup DTC
FTC Reader Disclosure: When you purchase or register through links on our site, we may earn an affiliate commission at no extra cost to you. Read our Editorial & Advertising Policy.

P0203 on Dodge: Symptoms, Causes & Fix

Injector Circuit Malfunction - Cylinder 3

Official technical diagnostic wire for fault code P0203 specifically affecting Dodge vehicles (Charger, Challenger, Durango, Hornet, Journey).

Sensor Voltage Ref
0.1V – 5.0V Ref
Dodge Factory Standard
CAN Bus Speed
500 kbps CAN-FD
ISO 15765-4 Diagnostic Bus
Drivability Status
Not Recommended
Critical urgency level
Est. Repair Cost
$150 - $550 (DIY: $40 - $180)
Parts & Labor DIY
Model-Specific Diagnostic Wires

Select Your Dodge Model for P0203:

4 Models Available
Dodge Charger2020–2026
Dodge ChargerSedan • 5.7L / 6.4L 392 HEMI / 6.2L Hellcat (717HP–797HP) / Hurricane 3.0L Turbo
P0203 Fix & DLC Location
Dodge Challenger2020–2026
Dodge ChallengerCoupe • 3.6L Pentastar V6 (305HP) / 5.7L HEMI V8 / 6.2L Redeye Widebody (807HP)
P0203 Fix & DLC Location
Dodge Durango2021–2026
Dodge DurangoSUV • 3.6L Pentastar V6 (293HP) / 5.7L HEMI V8 (360HP) / 6.4L 392 SRT (475HP)
P0203 Fix & DLC Location
Dodge Hornet2023–2026
Dodge HornetSUV • 2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD)
P0203 Fix & DLC Location

1. Common Symptoms on Dodge Vehicles

When Dodge Engine Control Modules (ECM) trigger fault code P0203, drivers typically report:

Flashing Check Engine Light on Dodge Powertrains
Engine shaking and misfiring on Dodge Powertrains
Loss of power on Dodge Powertrains
P0303 companion code on Dodge Powertrains

2. Root Causes on Dodge Engines

Historical diagnostic claims across Dodge engines point to the following failure distribution:

55%
Cylinder 3 fuel injector open/short (Dodge OEM Part)
25%
Wiring harness chafed or broken (Dodge OEM Part)
12%
Corroded connector (Dodge OEM Part)
8%
PCM driver failure (Dodge OEM Part)

3. Step-by-Step Fix Protocol for Dodge

01
Test Cylinder 3 Injector Resistance

Measure coil resistance with multimeter (12–16 ohms nominal). on Dodge engines.

Required Tool: Digital Multimeter
02
Check Pulse with Noid Light

Confirm ECM is sending pulse ground signals. on Dodge engines.

Required Tool: Noid Light
03
Replace Fuel Injector 3

Install replacement OEM injector with fresh O-rings. on Dodge engines.

Required Tool: Socket Set, Fuel Line Tool
04
Clear Trouble Codes

Clear codes and confirm misfire counter is zero. on Dodge engines.

Required Tool: OBD-II Scanner
Recommended Parts & Testing Tools

Equipment for Diagnosing Dodge (P0203)

Prime Fast Delivery & Verified Fitment
Direct-Fit Replacement Part

Dodge OEM Replacement Sensor

4.7 / 5.0 (Verified Fit)

Direct-fit replacement assembly engineered to OEM tolerances for Dodge.

$45 – $95 Prime
Check Fitment on Amazon
Sensor Signal Voltage Meter

AstroAI Auto-Ranging Digital Multimeter

4.6 / 5.0 (Best Seller)

Essential for testing 0.1V–5.0V sensor reference signals, ground continuity (<0.20Ω), and harness resistance.

$29.99 Prime
View on Amazon
Top Mobile OBD-II Scanner

BlueDriver Bluetooth Pro OBDII Scan Tool

4.7 / 5.0 (50,000+ Reviews)

Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.

Compare OEM & Aftermarket Replacement Sensors for DodgeVerified direct-fit pricing from Denso, Bosch, Motorcraft, and ACDelco on Amazon.
Find Parts on Amazon
* As an Amazon Associate, MazicBay earns from qualifying purchases. Prices & availability subject to change.

4. Dodge P0203 Frequently Asked Questions

What does code P0203 mean on a Dodge?

On Dodge vehicles, P0203 indicates that the Engine Control Module (ECM) detected injector circuit malfunction - cylinder 3. This typically points to Cylinder 3 fuel injector open/short or Wiring harness chafed or broken.

Can I continue driving my Dodge with code P0203?

No. Do not drive with a dead fuel injector circuit on Cylinder 3. Because this code carries a Critical severity rating on Dodge powertrains, we recommend scanning live data values promptly to prevent secondary damage.

How much does it cost to fix code P0203 on a Dodge?

Estimated DIY parts cost ranges from $150 - $550 (DIY: $40 - $180), while professional shop repairs at an authorized Dodge dealership or independent specialist typically range from $180 to $380 including diagnostic labor.