Injector Circuit Malfunction - Cylinder 2
The P0202 code indicates a problem in the electrical circuit of the fuel injector for cylinder 2. This means the engine control module (ECM) has detected an open or short circuit in the injector wiring or a faulty injector itself. This can cause a misfire, rough idle, and reduced engine performance.
01. Most Common Causes
- Faulty fuel injector on cylinder 2
- Open or shorted wiring in the injector circuit
- Damaged connector at the injector
- Failed ECM (rare)
02. Symptoms You Will Notice
- Check Engine Light on
- Engine misfire or rough idle
- Poor acceleration and reduced power
- Increased fuel consumption
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm P0202 and check for related codes.
Step 2: Visually inspect the injector connector and wiring for damage or corrosion.
Step 3: Measure resistance of injector 2 (typically 12-16 ohms) and compare to other injectors.
Step 4: Perform a power and ground test at the injector connector with a multimeter.
Step 5: If wiring and injector are good, test the ECM output or swap injectors to isolate the issue.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause catalytic converter damage from unburned fuel. Short trips to a repair shop are okay.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, but can be higher if the injector or ECM needs replacement.