Maxus Fault Code
Free · no signupP0698
Multiple Sensor Codes / Engine Dead Pedal
System
Electrical / Engine
Symptom
Multiple Sensor Codes / Engine Dead Pedal
Diagnosis & fix steps
LOGIC: Sensor Reference Voltage Module "C" Circuit Low (5V Ref Drop).
ACTION: Disconnect low-pressure EGR, boost sensor, and AC pressure switch one by one while watching 5V bus voltage on a multimeter to isolate the internally shorted sensor.
Red Seal field insights
Shared 5V Supply Rail: An internal short to ground inside any single engine sensor on the 5V "C" rail drags down the whole circuit, blinding multiple critical sensors simultaneously.
Same code keeps coming back?
That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.
Read before you touch anything
- This is general reference information, not a repair manual. It is for trained, qualified technicians.
- Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
- Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
- You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
- Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.
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