P21D0

Symptoms

• Unstable engine operation
• Misfire in cylinder 2
• Increased fuel consumption
• Difficulty starting the engine
• Check Engine Light Is On

Causes

• Broken injector control circuit wires
• Cylinder 2 injector malfunction
• Short circuit in the circuit
• Poor contact in the injector connector
• Malfunction of the injector driver in the ECU

How to Fix

1. Check the integrity of the injector control circuit wires
2. Measure the resistance of the injector of cylinder 2
3. Check the contacts of the injector connector
4. Check the presence of a control signal from the ECU
5. If necessary, replace the injector

Related codes

Error P21D0 by Vehicle Brand