Interchange Part Number : 9970, A0011596601Replaces OE Number : 9970, A0011596601
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NGKGlow PlugManufacturer #9970
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NGK REGULAR CLASS GLOW PLUG, SOLD INDIVIDUALLY
Offers short pre-heat time and improved cold start; Designed to meet increasing restriction on exhaust emissions; Improves the starting performance of diesel engines and contributes to the reduction of exhaust gas emissions.
P0683 Code: Glow Plug Control Module to PCM Communication CircuitA glow plug is a heating device with 12 volts from the battery. The PCM controls the glow plug depending on the engine’s temperature. If the PCM receives a signal from the sensors indicating a cold engine, it will instruct the glow plug control module (GPCM) to turn on the
P0676 Code: Cylinder #6 Glow Plug Circuit / OpenIn a typical system, the engine management computer determines when to use glow plugs to help the engine start when the engine is cold. The glow plug timer module grounds the glow plug relay to send power to the glow plugs.
P0381 Code: Glow Plug/Heater Indicator CircuitThe powertrain control module (PCM) monitors and retrieves information like coolant temperature when you start your engine. It does this to check if your engine is hot enough to function properly.
Can You Drive With a Lit Glow Plug Light? Plus Related FAQsPro Tips are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.
Where Are the Glow Plugs Located?The powertrain control module controls most glow plugs in newer vehicles. The glow plugs turn on or off, depending on the engine’s temperature.
A glow plug connected to 12 volts with the housing grounded; glow plugs get extremely hot really fast, as you can see here. | Image Source: Richard McCuistian
Tips
P0678 Code: Cylinder #8 Glow Plug Circuit / OpenThe check engine light will likely illuminate as soon as the PCM detects a faulty glow plug. There might not be any immediate symptoms since the engine can still start if there’s only one faulty glow plug. However, you’re more likely to experience the following symptoms if the weather is