Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that a part of the car's engine that helps it go faster is getting too hot.
The P12D8 code indicates that the temperature of the wastegate 'B' in the turbocharger or supercharger system is higher than the acceptable limit.
The wastegate is a component in turbocharged engines that helps control the boost pressure by diverting exhaust gases away from the turbocharger's turbine wheel. The 'B' designation refers to a specific wastegate or sensor in the system. If the temperature of this wastegate exceeds the threshold, it can lead to performance issues or damage.
• Check Engine Light (CEL) is on
• Reduced engine performance
• Unusual noises from the turbocharger area
• Faulty wastegate temperature sensor
• Excessive engine load or overboost conditions
• Blocked or restricted exhaust flow
Turbocharger: A device that increases an engine's efficiency and power output by forcing extra air into the combustion chamber.
Wastegate: A valve that controls the flow of exhaust gases to the turbocharger's turbine.
• Use an OBD-II scanner to confirm the P12D8 code
• Inspect the wastegate temperature sensor and wiring for damage
• Check for any exhaust restrictions or leaks
• Replace the wastegate temperature sensor if faulty
• Repair or replace any damaged wiring or connectors
• Clear any blockages in the exhaust system
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram 1500
• Regularly inspect and maintain the turbocharger system
• Avoid excessive engine loads
• Ensure proper exhaust flow
Engine Performance
• Avoid driving aggressively until the issue is resolved
• Have the vehicle inspected by a professional mechanic
Check with the vehicle manufacturer; turbocharger components may be covered under the powertrain warranty.
This code has become more common with the increased use of turbocharged engines in modern vehicles.
Moderate – It should be addressed soon to avoid potential engine damage.
Ignoring this code can lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle under load conditions
The wastegate is typically located near the turbocharger, which is mounted on the exhaust manifold.
Q: Can I drive with the P12D8 code?
A: It's not recommended to drive for long periods with this code active, as it can lead to further engine damage.
Q: What happens if I ignore this code?
A: Ignoring this code can result in reduced engine performance and potential damage to the turbocharger.
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