Accelerator Pedal Position Lost on J1939
What does DD-898-9 mean?
The DD-898-9 (Detroit Diesel DD Series) diesel fault code means: Accelerator Pedal Position Lost on J1939. This is a serious severity code.
Common Symptoms
- Check Engine Light / Amber Warning Lamp illuminated
- No throttle response / limp
Probable Causes (Ranked by Likelihood)
- Failed accelerator pedal module Likely
- CAN break to pedal Likely
Step-by-Step Diagnostic Procedure
Read APP1/APP2 live values via DDDL.
Inspect pedal connector for bent pins.
Replace electronic pedal assembly if it reports no data.
Frequently Asked Questions
What is Detroit Diesel fault code DD-898-9?
Detroit Diesel fault DD-898-9 (SPN 898 FMI 9) indicates: Accelerator Pedal Position Lost on J1939. It is a serious-severity fault and is commonly seen on DD13/DD15/DD16 engines in Freightliner and Western Star chassis.
Can I drive my Freightliner or Western Star with fault DD-898-9?
It depends on severity. Critical and serious faults trigger derate or engine shutdown — do not continue driving. Moderate faults usually allow continued operation short-term but schedule repair to prevent cascading aftertreatment damage.
How much does it cost to fix Detroit Diesel fault DD-898-9?
Typical repair cost is $1,200-$3,800. Sensor/harness fixes fall at the low end; turbo actuator, injector, aftertreatment component, or head gasket repairs fall at the high end. Detroit DDDL software and sometimes factory parameter reset are required for proper reset.