P0202 Injector Circuit Malfunction Cylinder 2

Definition: The P0202 code indicates that the engine control module (ECM) has detected a malfunction in the injector circuit for cylinder 2. This could be due to an electrical issue such as a short or open circuit, or a problem with the fuel injector itself.

p0202 – Injector Circuit Malfunction Cylinder 2

Typical Severity: Moderate

Common Causes

P0202 Injector Circuit Malfunction Cylinder 2

Common Causes:

• Faulty fuel injector in cylinder 2
• Open or short circuit in the wiring harness connected to injector in cylinder 2
• Poor electrical connection related to injector in cylinder 2
• Faulty Engine Control Module (ECM)

 

Common Misdiagnosis

OBD2 Code: P0202

Description: Injector Circuit Malfunction Cylinder 2

Common Misdiagnosis: Replacing the fuel injector without checking for wiring issues or a faulty PCM (Powertrain Control Module).

 

Common Diagnostic Steps

OBD2 Code: P0202

Description: Injector Circuit Malfunction – Cylinder 2

• Check the injector connector for corrosion or damage.
• Inspect the wiring harness for any signs of wear, fraying, or disconnection.
• Test the fuel injector resistance using a multimeter to ensure it is within specifications.
• Verify that there is proper voltage at the injector connector when the engine is running.
• Perform a continuity test on the wiring between the injector and the Engine Control Module (ECM).
• Swap injectors between cylinders to see if the problem follows the injector or stays with cylinder 2.
• If applicable, check for any ECM updates or technical service bulletins related to this issue.