OBD Guide

P21E7

Cylinder 6 Injector B Circuit High

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$28–89 (est.)

Symptoms

  • Unstable engine operation
  • Increased fuel consumption
  • Power Loss
  • Dips during acceleration
  • Check Engine Light Illuminates

Causes

  • Cylinder 6 injector malfunction
  • Open or short circuit in control circuit
  • Wiring Harness Problems
  • Engine control unit (ECU) malfunction
  • Corroded contacts or poor connection

How to Fix

  1. Check the resistance of the injector of cylinder 6
  2. Inspect the wiring harness and connections for damage.
  3. Check the voltage in the injector control circuit
  4. If necessary, replace the nozzle or repair the wiring
  5. Test the operation of the engine control unit

Related codes

Error P21E7 by Vehicle Brand