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.
DTC P1607: Powertrain Control Module Internal Circuit Malfunction
2004 Acura 3.5RLSECTION DTC P1607: Powertrain Control Module Internal Circuit Malfunction
WARNING: This page is about a different car, the 2003 Acura 3.2TL and 2003 Acura 3.2CL. However, it is still accessible from the selected car via links, so may be relevant.
- Perform PCM reset procedure. See PCM RESET PROCEDURE/CLEARING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM. Turn ignition switch on. Wait 30 seconds. If DTC P1607 does not set, go to next step. If DTC P1607 sets, substitute known-good PCM, then recheck. If symptom or indication goes away, replace original PCM.
- Turn ignition switch off. Turn ignition switch back on. Wait 10 seconds. If DTC P1607 sets, substitute known-good PCM, then recheck. If symptom or indication goes away, replace original PCM. If DTC P1607 does not set, problem is intermittent. System is okay at this time.
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.