P1508 – Honda DTC

Honda DTC P1508 – IAC Valve Circuit Failure

DTC P1508 meaning on Honda

DTC P1508 indicates a failure in the IAC (Idle Air Control) Valve Circuit on a Honda vehicle. The IAC valve is responsible for regulating the engine’s idle speed by controlling the amount of air entering the engine.

Honda DTC P1508 symptoms

• Fluctuating or high idle speed
• Engine stalling at idle
• Poor acceleration
• Check Engine Light illuminated

Honda DTC P1508 causes

• Faulty IAC valve
• Wiring or connector issues in the IAC circuit
• PCM (Powertrain Control Module) failure

Honda DTC P1508 seriousness

The DTC P1508 should be addressed promptly as it can lead to drivability issues such as stalling and poor acceleration. Ignoring this code may result in further damage to engine components.

How to diagnose DTC P1508 on Honda

1. Use a scan tool to retrieve the DTC and freeze frame data
2. Inspect the IAC valve and its wiring for any visible damage
3. Check the connector for corrosion or poor connection
4. Perform a voltage test on the IAC circuit

How to fix DTC P1508 on Honda

1. Replace the faulty IAC valve if necessary
2. Repair any damaged wiring or connectors in the IAC circuit
3. If the PCM is diagnosed as the issue, it may need to be replaced or reprogrammed

How to erase DTC P1508 on Honda

1. After the repair is completed, use a scan tool to clear the DTC
2. Start the engine and ensure the code does not return