Injector Circuit Malfunction - Cylinder 8
The P0208 code indicates a malfunction in the electrical circuit of the fuel injector for cylinder 8. This means the powertrain control module (PCM) has detected an abnormal voltage or resistance in the injector circuit, which can prevent the injector from opening or closing properly, leading to fuel delivery issues.
1. Most Common Causes
- Cylinder 8 fuel injector with open or shorted internal coil
- Open, short-to-ground, or short-to-battery in the cylinder 8 injector control circuit wiring
- Cylinder 8 injector connector loose, corroded, or with damaged terminals
- Internal failure of the cylinder 8 injector driver (power transistor) inside the PCM
- Issues in the injector voltage supply circuit (relay, fuse, wiring)
2. Symptoms You Will Notice
- Engine misfire on cylinder 8
- Rough idle or hesitation
- Check Engine Light illuminated
- Decreased fuel economy and power loss
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect injector connector and wiring for damage or corrosion.
Step 3: Measure resistance of injector 8 (typically 11-18 ohms) and compare to other injectors.
Step 4: Check for power and ground at injector connector using a multimeter or test light.
Step 5: Perform a cylinder contribution test or injector balance test to confirm injector performance.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause engine misfire, catalytic converter damage, and poor performance. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, but replacing an injector can cost $200-$400 including parts and labor.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.