OBD Guide
ENFRDEESPT

P1311

ION Sensing Module SEC Line 1 Circuit Fault

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • The Check Engine light comes on
  • Unstable engine idling
  • Reduced engine power
  • Increased fuel consumption
  • Possible misfires

Causes

  • Broken or damaged SEC signal line wiring
  • Short circuit in the ion control module circuit
  • Malfunction of the ion control module
  • Problems with module connector or contacts
  • Engine control unit malfunction

How to Fix

  1. Check the integrity of the SEC signal line wiring
  2. Check connections and connectors of the ion control module
  3. Carry out diagnostics of the ion control module
  4. If necessary, replace the ion control module
  5. Diagnose the engine control unit

Related codes

P1300P1312P1316
FRDEESPT