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: Engine Control Module/Powertrain Control Module Internal Circuit Malfunction
Perform ECM/PCM reset procedure. See ECM/PCM RESET PROCEDURE/CLEARING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM. Turn ignition switch on. Wait 40 seconds. If DTC P1607 does not reset, problem is intermittent. System is okay at this time. If DTC P1607 resets, update Engine Control Module/Powertrain Control Module (ECM/PCM) or substitute with known-good ECM/PCM. If symptom or indication goes away, replace original ECM/PCM.
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.