Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car has a sensor that checks the temperature of the exhaust gases. This code means that the sensor is saying the temperature is too high.
The Engine Control Module (ECM) has detected that the voltage from the EGR temperature sensor is higher than the expected range.
The Exhaust Gas Recirculation (EGR) system helps reduce emissions by recirculating a portion of the exhaust gases back into the engine. The EGR temperature sensor monitors the temperature of these gases. A 'Circuit High' code indicates that the sensor is sending a voltage signal higher than the ECM's preset threshold, which might suggest a faulty sensor or wiring issues.
• Check Engine Light is on
• Possible decrease in engine performance
• Increased emissions
• Faulty EGR temperature sensor
• Wiring issues such as short to power
• Faulty ECM
EGR: Exhaust Gas Recirculation
ECM: Engine Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the EGR temperature sensor and its wiring for damage.
• Test the sensor with a multimeter to check for proper resistance and voltage.
• Replace the EGR temperature sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance and inspection of the EGR system.
• Ensure the vehicle's electrical system is in good condition.
• Use quality fuel to reduce carbon buildup.
Sensor Issue
• Have the vehicle inspected by a professional if you're not familiar with car repairs.
• Avoid driving for extended periods if the Check Engine Light is on.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code has been associated with EGR system issues in vehicles with advanced emissions control systems.
Moderate – Address the issue to prevent potential engine performance problems.
Ignoring emissions-related codes can lead to increased pollution and potential legal issues in areas with strict emissions laws.
• Engine at operating temperature
• Vehicle idling or under light load
The EGR temperature sensor is typically located near the EGR valve or in the exhaust manifold.
Q: Can I drive my car with a P04E8 code?
A: It's possible to drive short distances, but it's best to fix the issue soon to avoid potential engine damage.
Q: How do I know if my EGR temperature sensor is bad?
A: Symptoms include the Check Engine Light, poor engine performance, and increased emissions.
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