Cummins fault code 2764
Exhaust Gas Pressure 1: reading above normal (moderately severe)
What it means
Cummins' description: Exhaust Gas Pressure 1 - Data Valid But Above Normal Operating Range - Moderately Severe Level.
SPN 1209 is Engine Exhaust Gas Pressure 1. FMI 16 means the value is clearly above normal operating range. It's the middle 'high' level.
The engine (compression) brake and exhaust back pressure valve help slow the truck and warm up the engine and aftertreatment. The ECM controls them with solenoids and monitors their position.
What the lamp means
An amber (yellow) warning lamp means the engine can usually keep running, but the fault should be repaired soon, ideally the same day.
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
A brake code that set once and the engine brake still works on all settings.
Schedule a repair
The engine brake doesn't work on one or more settings, or slow warm-up. Get it fixed. You're relying more on the service brakes.
Stop and get help
Back pressure valve stuck closed (big power loss, overheating exhaust), or no engine brake on steep grades with a heavy load. Don't haul heavy until it's repaired.
Common causes
The sensor reading itself is out of range or the condition is real, so look at the system:
- Exhaust back pressure valve stuck from soot
- Engine brake out of adjustment
What you can check before calling
- Test whether the engine brake works on each setting
- Listen for the back pressure valve moving at startup
- Look for damaged wiring near the exhaust
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: QSX 15, 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 Engine brake and exhaust back pressure codes
- 2368 SPN 1112 FMI 3
Engine Brake Actuator Driver 3 Circuit: circuit voltage high / shorted high - 2367 SPN 1073 FMI 3
Engine Brake Actuator Driver Output 2 Circuit: circuit voltage high / shorted high - 2365 SPN 1112 FMI 4
Engine Brake Actuator Driver Output 3 Circuit: circuit voltage low / shorted low - 2363 SPN 1073 FMI 4
Engine Brake Actuator Driver Output 2 Circuit: circuit voltage low / shorted low - 2183 SPN 1072 FMI 4
Engine Brake Actuator Driver 1 Circuit: circuit voltage low / shorted low - 2182 SPN 1072 FMI 3
Engine Brake Actuator Driver 1 Circuit: circuit voltage high / shorted high
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 2764 mean?
Cummins fault code 2764 is J1939 SPN 1209 FMI 16: Exhaust Gas Pressure 1 - Data Valid But Above Normal Operating Range - Moderately Severe Level. In plain terms: exhaust gas pressure 1: reading above normal (moderately severe).
Can I keep driving with Cummins code 2764?
Usually for a short time, if the engine runs normally and no other warnings are on. Get it diagnosed soon, because many amber codes lead to a derate if ignored. Look at the green, yellow and red examples on this page to judge your situation.
What is the SPN and FMI for Cummins code 2764?
SPN 1209 identifies the part or system (Engine Exhaust Gas Pressure 1). FMI 16 describes the type of failure: reading above normal (moderately severe).
What usually causes Cummins code 2764?
The most common causes are: exhaust back pressure valve stuck from soot; engine brake out of adjustment.
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.