P0408 Chrysler Code - Exhaust Gas Recirculation Sensor 'B' Circuit High
Quick Answer
The P0408 code for Chrysler vehicles refers to a problem with the Exhaust Gas Recirculation (EGR) sensor 'B' circuit being detected as too high. Common causes include Faulty EGR Sensor: The EGR sensor itself may be malfunctioning, causing the circuit to read higher voltage levels, Wiring Issues: Damaged or corroded wiring connections to the EGR sensor can lead to circuit high readings, EGR Valve Stuck Open: If the EGR valve is stuck in the open position, it can cause the sensor to detect high voltages. 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
- P0408 Chrysler indicates Exhaust Gas Recirculation Sensor 'B' Circuit High.
- Common causes
- Common causes include Faulty EGR Sensor: The EGR sensor itself may be malfunctioning, causing the circuit to read higher voltage levels, Wiring Issues: Damaged or corroded wiring connections to the EGR sensor can lead to circuit high readings, EGR Valve Stuck Open: If the EGR valve is stuck in the open position, it can cause the sensor to detect high voltages.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0408 Chrysler Description
The P0408 code for Chrysler vehicles refers to a problem with the Exhaust Gas Recirculation (EGR) sensor 'B' circuit being detected as too high. The EGR system is responsible for recirculating a portion of the engine's exhaust gas back into the intake manifold to reduce emissions and control combustion temperatures. The EGR sensor 'B' is used to monitor the position of the EGR valve and ensure it is functioning correctly.
Common Causes of P0408 Chrysler
- Faulty EGR Sensor: The EGR sensor itself may be malfunctioning, causing the circuit to read higher voltage levels.
- Wiring Issues: Damaged or corroded wiring connections to the EGR sensor can lead to circuit high readings.
- EGR Valve Stuck Open: If the EGR valve is stuck in the open position, it can cause the sensor to detect high voltages.
- Carbon Buildup: Accumulated carbon deposits in the EGR system can interfere with sensor readings and lead to circuit high issues.
- ECM Malfunction: A malfunctioning Engine Control Module (ECM) can also trigger this code by providing incorrect voltage readings to the sensor.
Symptoms of P0408 Chrysler
- Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
- Reduced Engine Performance: The vehicle may experience a lack of power, hesitation, or rough idling due to improper EGR system operation.
- Increased Emissions: High levels of emissions may be detected during emissions testing as a result of the malfunctioning EGR sensor.
- Poor Fuel Efficiency: The vehicle may experience decreased fuel efficiency due to improper EGR system function.
- Engine Stalling: In severe cases, the engine may stall or have difficulty starting if the EGR system is not functioning properly.
How to Fix P0408 Chrysler
- Diagnose the Issue: Use a scan tool to retrieve the specific diagnostic trouble codes and pinpoint the exact cause of the problem.
- Inspect EGR Sensor: Check the EGR sensor and its wiring for any visible damage or corrosion.
- Test EGR Valve: Test the EGR valve for proper operation and clean or replace it if necessary.
- Check Wiring: Inspect the wiring connections to the EGR sensor for any loose or damaged wires and repair as needed.
- Clear Codes: After completing repairs, clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0408 Chrysler
The cost of repairing a P0408 code on a Chrysler vehicle can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair costs for this type of problem can range from $100 to $300, including parts and labor. Keep in mind that diagnostic time and labor rates can vary, so it's recommended to consult with a certified mechanic or dealership for a more accurate estimate based on your vehicle's make and model.
When is the Code Detected?
Need more information about the P0408 Chrysler code?
Need more information on how to fix the P0408 Chrysler code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0408 Chrysler code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0408 Chrysler Code
1. What are common symptoms of OBDII code P0408 in a Chrysler vehicle?
When the Exhaust Gas Recirculation (EGR) sensor 'B' circuit registers high, you may experience symptoms like reduced engine performance, rough idling, decreased fuel efficiency, and potential stalling.
2. What can cause the OBDII code P0408 in a Chrysler vehicle?
The P0408 code in a Chrysler is typically triggered by issues such as a faulty EGR sensor 'B', damaged wiring in the EGR circuit, or a malfunctioning EGR valve.
3. How serious is the OBDII code P0408 in a Chrysler vehicle?
While the P0408 code may not cause immediate harm to your vehicle, it can lead to decreased performance and increased emissions if left unresolved. It is recommended to address the issue promptly to prevent further damage.
4. Can I continue driving my Chrysler with the OBDII code P0408 present?
It is not advisable to ignore the P0408 code in your Chrysler as it can impact your vehicle's performance and fuel efficiency. Continuing to drive with this code present may lead to further issues down the line.
5. How can I diagnose the OBDII code P0408 in my Chrysler vehicle?
Diagnosing the P0408 code involves using an OBDII scanner to retrieve the specific fault code. Additionally, a thorough inspection of the EGR sensor 'B', wiring, and EGR valve is recommended to pinpoint the exact cause.
6. What are some repair tips for fixing the OBDII code P0408 in a Chrysler?
Repairing the P0408 code may involve replacing the faulty EGR sensor 'B', repairing damaged wiring, or cleaning/replacing the EGR valve. It is crucial to follow manufacturer guidelines and use quality parts for the repair.
7. Can I reset the OBDII code P0408 in my Chrysler without fixing the underlying issue?
Resetting the P0408 code without addressing the root cause will only temporarily clear the error code. The issue will likely reappear once the ECU detects the fault again, so it is best to fix the problem first.
8. How much does it typically cost to repair the OBDII code P0408 in a Chrysler?
The cost of repairing the P0408 code in a Chrysler can vary depending on the exact cause of the issue, labor rates, and parts needed. It is recommended to obtain quotes from reputable mechanics or dealerships for an accurate estimate.
9. Are there any preventive maintenance steps to avoid the OBDII code P0408 in a Chrysler?
Regularly servicing your vehicle, including EGR system inspections and cleaning, can help prevent issues like the P0408 code from occurring. Following the manufacturer's maintenance schedule and using quality components are key preventive measures.
10. Can a DIY enthusiast fix the OBDII code P0408 in a Chrysler at home?
While some experienced DIYers may be able to tackle the repairs associated with the P0408 code, it is recommended to have a professional mechanic diagnose and fix the issue to ensure proper repair and prevent further complications.
Discuss the causes and fixes for P0408 Chrysler OBDII Code
Code P0408 Chrysler comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.