Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 58 (ENGINE CONTROLS [SELF-DIAGNOSTICS 2.3L])DIAGNOSTIC TESTSDTC P2108: THROTTLE ACTUATOR CONTROL MODULE - PERFORMANCEPOSSIBLE CAUSES
2008 Mazda 6 s Sport, 4D Hatchback, Standard
Possible Causes
2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Possible Causes
WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
Possible causes are:
- Connector or terminal malfunction
- Open circuit between throttle body 6-pin harness connector terminal "F" (White/Green wire) and PCM 30-pin harness connector terminal "4Y" (Brown/Black wire)
- Open circuit between throttle body 6-pin harness connector terminal "D" (White/Blue wire) and PCM 27-pin harness connector terminal "3K" (Pink/Blue wire)
- Short to ground circuit between throttle body 6-pin harness connector terminal "D" (White/Blue wire) and PCM 27-pin harness connector terminal "3K" (Pink/Blue wire)
- Open circuit between throttle body 6-pin harness connector terminal "E" (Black wire) and PCM 30-pin harness connector terminal "4AB" (Blue/White wire)
- Open circuit between throttle body 6-pin harness connector terminal "C" (Brown/Red wire) and PCM 27-pin harness connector terminal "3J" (Brown/Black wire)
- PCM malfunction
- Short to constant voltage supply circuit between throttle body 6-pin harness connector terminal "C" (Brown/Red wire) and PCM 27-pin harness connector terminal "3J" (Brown/Black wire)
- Short to constant voltage supply circuit between throttle body 6-pin harness connector terminal "F" (White/Green wire) and PCM 30-pin harness connector terminal "4Y" (Brown/Black wire)
- Short to ground circuit between throttle body 6-pin harness connector terminal "C" (Brown/Red wire) and PCM 27-pin harness connector terminal "3J" (Brown/Black wire)
- Short to ground circuit between throttle body 6-pin harness connector terminal "F" (White/Green wire) and PCM 30-pin harness connector terminal "4Y" (Brown/Black wire)
- TP sensor No. 1 malfunction
- TP sensor No. 2 malfunction
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.