Secondary Air Injection Module Short to Positive
2011-2017 Audi A8 3.0L Supercharged V6
Description
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.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1420 on Other Vehicles
Common Questions
What does code P1420 mean on a 2011-2017 Audi A8?
P1420 stands for "Secondary Air Injection Module Short to Positive". 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.
What are the symptoms of P1420 on a Audi A8?
Common symptoms of P1420 include: Check Engine Light, Failed emissions test, Abnormal engine sound on cold start.
What causes P1420 on a 2011-2017 Audi A8?
Common causes of P1420 include: Wiring short in secondary air module circuit, Faulty secondary air injection module, Damaged connector, Relay failure, Corroded wiring.