Cylinder 8 Injector Circuit Low
The P0282 code indicates that the Engine Control Module (ECM) has detected a low voltage or resistance condition in the electrical circuit for the fuel injector on cylinder 8. This typically means the injector circuit is drawing less current than expected, which can be caused by a faulty injector, wiring issues, or a poor electrical connection. The ECM monitors the injector driver circuit and sets this code when the voltage is below the specified threshold.
1. Most Common Causes
- Faulty fuel injector on cylinder 8
- Open or shorted wiring in the injector circuit
- Poor electrical connection at the injector or ECM
- Failed ECM (rare)
2. Symptoms You Will Notice
- Engine misfire on cylinder 8
- Rough idle or hesitation
- Check Engine Light illuminated
- Decreased fuel economy
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the injector connector and wiring for damage or corrosion.
Step 3: Measure resistance of cylinder 8 injector; compare to specification (typically 12-16 ohms).
Step 4: Check for voltage at the injector connector with key on; should be battery voltage on one pin.
Step 5: Use a noid light to test injector pulse while cranking; if no flash, check wiring and ECM output.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive for extended periods as it can cause misfire, catalytic converter damage, and poor performance. Limp home if necessary.
How much does it cost to fix?▼
The cost ranges from $150 to $400 depending on the cause. Injector replacement is typically $200-$300, while wiring repairs may be less.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.