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.
Monitored & Set Conditions
DTC P1698 is monitored only on vehicles equipped with automatic transmission, with the ignition on and battery voltage more than 10.0 volts. DTC will set when no bus messages are received from the Transmission Control Module (TCM) for 20 seconds. This is a 2-trip fault. See TRIP INDICATOR under ON-BOARD DIAGNOSTICS under SELF-DIAGNOSTIC SYSTEM.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.