P1408 Code - EGR Flow Out Of Self Test Range
Quick Answer
The P1408 code indicates that the exhaust gas recirculation (EGR) flow is out of the self-test range set by the vehicle's computer. Common causes include Faulty EGR valve, Clogged EGR passages, Malfunctioning EGR sensor. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P1408 indicates EGR Flow Out Of Self Test Range.
- Common causes
- Common causes include Faulty EGR valve, Clogged EGR passages, Malfunctioning EGR sensor.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
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Code P1408 Description
The P1408 code indicates that the exhaust gas recirculation (EGR) flow is out of the self-test range set by the vehicle's computer. The EGR system is responsible for reducing nitrogen oxide emissions by recirculating a portion of the engine's exhaust gas back into the intake manifold. When the EGR flow is outside of the expected range, it can lead to poor engine performance, increased emissions, and potential damage to the catalytic converter. This issue can be caused by a faulty EGR valve, clogged EGR passages, or a malfunctioning EGR sensor.
Common Causes of P1408
- Faulty EGR valve
- Clogged EGR passages
- Malfunctioning EGR sensor
- Vacuum leak in the EGR system
- Carbon buildup in the EGR system
Symptoms of P1408
- Rough idle or stalling
- Decreased fuel efficiency
- Engine knocking or pinging
- Check Engine Light illuminated
- Failed emissions test
How to Fix P1408
- Diagnose the EGR system using a scan tool to confirm the P1408 code.
- Inspect the EGR valve for proper operation and replace if necessary.
- Clean out any clogged EGR passages or replace any damaged components.
- Test the EGR system after repairs to ensure proper function.
- Clear the trouble code and perform a test drive to verify that the issue has been resolved.
Cost to Fix P1408
The cost of repairing a P1408 code can vary depending on the specific cause of the issue. In general, replacing a faulty EGR valve can cost between $150 and $300, while cleaning out clogged passages may cost around $100 to $200. Labor costs can range from $80 to $150 per hour, and overall, the total repair bill may fall between $200 to $500. It's recommended to get a detailed quote from a trusted mechanic or dealership to get an accurate estimate for your vehicle.
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Code P1408 Information for Specific Makes
- P1408 Audi — EGR Temperature Sensor Signal Too High
- P1408 BMW — Tank Fill Level Left Signal
- P1408 Buick — Intake Manifold Pressure Sensor Circuit
- P1408 Cadillac — Intake Manifold Pressure Sensor Circuit
- P1408 Chevrolet — Intake Manifold Pressure Sensor Circuit
- P1408 Ford — EGR Flow Out Of Self-Test Range
- P1408 GMC — Intake Manifold Pressure Sensor Circuit
- P1408 Jaguar — EGR Flow Out Of Self Test Range
- P1408 Lincoln — EGR Flow Out Of Self-Test Range
- P1408 Mazda — EGR Out Of Self Test Range
- P1408 Mercury — EGR Flow Out Of Self-Test Range
- P1408 Suzuki — Manifold Differential Pressure Sensor Circuit Malfunction
- P1408 Volkswagen — EGR Temperature Sensor Signal Too High
Frequently Asked Questions about P1408 Code
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