P0208 medium Severity

P0208: Injector Circuit/Open – Cylinder 8

Check engine light illuminated, rough idle, misfire on cylinder 8, reduced power and fuel efficiency

Overview

P0208 indicates an electrical malfunction in the fuel injector circuit for cylinder 8, typically caused by wiring issues, faulty injector, or PCM driver faults, leading to misfire and drivability issues.

Common Symptoms

  • Check engine light illuminated
  • Rough idle and engine vibration
  • Misfire specifically on cylinder 8
  • Reduced acceleration and power
  • Decreased fuel economy
  • Possible increased emissions

Most Common Causes

Faulty fuel injector on cylinder 8 high

Internal injector coil or connector can fail causing open circuit

Wiring harness damage to injector circuit high

Broken, frayed, or corroded wiring including poor connector contacts

Poor electrical connection at injector or PCM medium

Corroded or loose pins can create intermittent faults

PCM/ECM driver circuit failure medium

Internal PCM transistor (driver) fault can cause low voltage

Diagnostic Steps

  1. Connect professional OBD-II scanner and confirm P0208 and any related codes
    Expected: Code P0208 present with freeze frame data
    Interpretation: Confirms injector circuit fault for cylinder 8
  2. Visually inspect wiring harness and injector connector for damage, corrosion, or loose pins
    Expected: No visible wiring damage or corrosion
    Interpretation: Good wiring reduces probability of open/short circuit; if damaged, repair and retest
  3. Measure voltage at injector connector with ignition on
    Expected: Approximately 12V supply
    Interpretation: Low voltage suggests wiring or PCM driver issue
  4. Measure injector resistance with multimeter
    Expected: Resistance in manufacturer specified range
    Interpretation: Out of range indicates faulty injector
  5. Use noid light or oscilloscope to confirm injector pulse signal
    Expected: Injector receives proper pulse signal when engine cranks
    Interpretation: No pulse indicates PCM or wiring fault

Repair Solutions

Repair or replace damaged wiring and connectors medium
Estimated Cost: $50 - $300

Fix broken harness, pins, or corrosion first before replacing components

Replace faulty fuel injector on cylinder 8 medium
Estimated Cost: $150 - $500

Injector replacement costs vary by vehicle and part quality

Replace PCM/ECM (if internal driver fault confirmed) hard
Estimated Cost: $600 - $1200

PCM replacement and programming required; rare but possible

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Assuming dirty injector is cause (P0208 is an electrical circuit issue)
  • Replacing injector without testing wiring and PCM driver

Frequently Asked Questions

What is the definition of the P0208 engine code?

The P0208 code stands for Injector Circuit/Open – Cylinder 8. This generally indicates an issue with the Fuel System system.

Should I stop driving if I have P0208?

With a severity level of medium, check engine light illuminated, rough idle, misfire on cylinder 8, reduced power and fuel efficiency

What are the symptoms of P0208?

The most typical signs are: Check engine light illuminated, Rough idle and engine vibration, Misfire specifically on cylinder 8.

What parts fail when P0208 is set?

This code is frequently triggered by: Faulty fuel injector on cylinder 8, Wiring harness damage to injector circuit, Poor electrical connection at injector or PCM.

Is P0208 expensive to fix?

The cost varies significantly based on the root cause. For example, replacing a Repair or replace damaged wiring and connectors typically costs between $50 and $300, while fixing a Replace PCM/ECM (if internal driver fault confirmed) can range from $600 to $1200.

Does P0208 affect Ford, Toyota, or Honda?

P0208 is not specific to any one brand. It can appear on Ford, Dodge, Toyota, Honda, Jeep, and other vehicles.

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