P1420moderate severityPowertrain
Secondary Air Injection Module Short to Positive
on 1997-2024 Porsche 718 Boxster 2.7L H6 · RWD
What this code means
The ECU detected a short to positive voltage in the secondary air injection control module circuit. The secondary air system cannot operate correctly for cold-start emission reduction.
Symptoms
- Check Engine Light
- Failed emissions test
- Abnormal engine sound on cold start
Common causes
- Wiring short in secondary air module circuit
- Faulty secondary air injection module
- Damaged connector
- Relay failure
- Corroded wiring
Diagnostic steps
- Test secondary air module circuit for shorts
- Inspect wiring and connector
- Test secondary air pump relay
- Check for voltage at module connector
- Test secondary air pump operation
Repair notes
Repair the wiring short or replace the secondary air injection control module.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1