P0408 Chrysler Code - Exhaust Gas Recirculation Sensor 'B' Circuit High
Quick Answer
Early Exhaust Gas Recirculation (EGR) systems components include an EGR Valve, an Engine Control Module (ECΜ) Controlled Vacuum Switch Valve or EGR Solenoid, and an EGR Vacuum Modulator. Common causes include Faulty EGR volume control solenoid valve, Carbon built up on EGR valve, EGR volume control solenoid valve harness is open or shorted. 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 volume control solenoid valve, Carbon built up on EGR valve, EGR volume control solenoid valve harness is open or shorted.
- 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.
Code P0408 Chrysler Description
The EGR system on recently built vehicles uses a step motor to control the flow rate of EGR from the exhaust manifold. This motor has four winding phases. It operates according to the output pulse signal of the ECΜ. Two windings are turned ON and OFF in sequence. Each time an ON pulse is issued, the valve opens or closes, changing the flow rate. When no change in the flow rate is needed, the ECΜ does not issue the pulse signal. Α certain voltage signal is issued so that the valve remains at that particular opening.
What are the Possible Causes of the DTC P0408 Chrysler?
- Faulty EGR volume control solenoid valve
- Carbon built up on EGR valve
- EGR volume control solenoid valve harness is open or shorted
- EGR volume control solenoid valve circuit poor electrical connection
- Faulty EGR temperature sensor and circuit
How to Fix the DTC P0408 Chrysler?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0408 Chrysler code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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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.
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