Cummins fault code 6498
Engine Intake Throttle Actuator Position Sensor Circuit- Voltage above normal, or shorted to low source: circuit voltage low / shorted low
What it means
Cummins' description: Engine Intake Throttle Actuator Position Sensor Circuit- Voltage above normal, or shorted to low source.
SPN 51 is Engine Intake Throttle Actuator Position Sensor Circuit. FMI 4 means the voltage on the circuit is lower than possible for a good sensor, usually a short to ground, a damaged harness, or a failed sensor.
Some Cummins engines have an electronic intake throttle to help regeneration and a smooth shutdown. Others have an air shutoff valve that can stop the engine in an emergency.
What the lamp means
This code normally doesn't turn on a dash lamp. It's logged in the ECM for a technician to see, and often explains another active code.
Green, yellow, red: three ways this can look
The same code can be a quick fix or a reason to shut down. Match your situation to the closest example.
Keep an eye on it
An informational code reminding you a shutoff test is due.
Schedule a repair
Rough running, slow regens, or throttle codes that keep coming back. Have it cleaned or replaced.
Stop and get help
Engine shuts down or won't start because the air shutoff is closed or stuck. It needs a technician on site.
Common causes
FMI 4 is an electrical or signal fault, so start with the circuit:
- Throttle actuator or position sensor wiring fault
- Air shutoff valve sensor or circuit fault
If the circuit checks out, the reading may be real. Other possibilities: throttle plate sticking from soot and oil; air shutoff tripped and not reset; air shutoff maintenance test overdue.
What you can check before calling
- Check whether the air shutoff has been tripped and needs resetting
- Look for oil and soot buildup at the intake throttle
Clearing the code without fixing the cause usually brings it right back, and on emissions systems it can restart derate timers.
Engines and sources
Listed by Cummins for: QSB 6.7, QSL 9, QSX 15, QSB 4.5, QSF 3.8, QSG 12. Cummins uses the same fault code numbers across its electronic engines, including on-highway models like the ISB/B6.7, ISL/L9 and ISX/X15, though not every code applies to every engine or software level. Source: Cummins Tier 4 Fault Codes. Always confirm with Cummins service information (QuickServe) for your engine serial number.
Same SPN, other failure types
Related Intake throttle and air shutoff codes
- 6496 SPN 3464 FMI 5
Electronic Throttle Control Actuator Driver Circuit- Current Below Normal or Open Circuit: circuit open / current low - 6494 SPN 3464 FMI 4
Electronic Throttle Control Actuator Driver Circuit- Voltage above normal, or shorted to low source: circuit voltage low / shorted low - 6493 SPN 3464 FMI 3
Electronic Throttle Control Actuator Driver Circuit- Voltage above normal, or shorted to high source: circuit voltage high / shorted high - 5292 SPN 520809 FMI 31
Excessive Time Since Last Engine Air Shutoff Maintenance Test: condition exists - 5221 SPN 3667 FMI 2
Engine Air Shutoff Status: erratic or intermittent signal - 4484 SPN 3667 FMI 7
Engine Air Shutoff: not responding / out of adjustment
Look up another code
Cummins fault code (like 1922), J1939 SPN and FMI (like SPN 3251 FMI 0), or an OBD-II code (like P0420).
Questions
What does Cummins fault code 6498 mean?
Cummins fault code 6498 is J1939 SPN 51 FMI 4: Engine Intake Throttle Actuator Position Sensor Circuit- Voltage above normal, or shorted to low source. In plain terms: engine intake throttle actuator position sensor circuit- voltage above normal, or shorted to low source: circuit voltage low / shorted low.
Can I keep driving with Cummins code 6498?
Usually, yes. This code doesn't normally turn on a lamp by itself, but check for other active codes that might be more serious. Look at the green, yellow and red examples on this page to judge your situation.
What is the SPN and FMI for Cummins code 6498?
SPN 51 identifies the part or system (Engine Intake Throttle Actuator Position Sensor Circuit). FMI 4 describes the type of failure: circuit voltage low / shorted low.
What usually causes Cummins code 6498?
The most common causes are: throttle actuator or position sensor wiring fault; air shutoff valve sensor or circuit fault.
Diesel down in the Midlands?
We work on Cummins-powered pickups, vans and medium-duty trucks across Lexington, Columbia and the Midlands, on site at your yard or roadside.