Just checked my truck and I'm getting a P0477 Exhaust Pressure Control Relay Low code. Anyone have an idea what this means?

Also, when I hold down the trip reset button and turn the key to on, the display spits out C 447, S 116, and what appears to be . 281. Any idea what these mean?

Thanks.

 

So, I guess I have stumped everyone?

 

The text “C Code” is displayed in the odometer VFD for about three seconds. If there is no stored fault information, the display will show two pairs of zeroes in the format “00” “00”, which indicate that the display of fault information is done. If there is stored fault information, two sets of two-digit alpha and alpha-numeric fault codes will appear in the odometer display for a three second interval. The first pair of digits represents a Diagnostic Trouble Code (DTC), or fault code for the instrument cluster. The second pair of digits is a counter for the number of ignition key cycles that have occurred since the displayed DTC was set. The instrument cluster will continue to display additional sets of two pairs of digits at three second intervals until all of the stored codes have been displayed, which is again signaled by a code of “00” “00”. Refer to the Instrument Cluster Failure Message table for a description of each fault code that the instrument cluster displays. If an instrument cluster fault is displayed, use a DRBIII® scan tool to diagnose the problem. Refer to the appropriate diagnostic information.

Instrument Cluster Diagnostic Trouble Codes
01 Airbag warning indicator output circuit shorted
02 Airbag warning indicator output circuit open
03 ABS indicator output circuit shorted
04 ABS indicator output circuit open
05 MIL indicator output circuit shorted
06 MIL indicator output circuit open
07 Wait to start indicator output circuit shorted
08 Wait to start indicator output circuit open
0B BTSI output circuit shorted or open
0C PRNDL switch input circuit shorted
0D PRNDL switch input circuit open
20 Panel dimmer input circuit shorted
21 Panel dimmer input circuit open
22 Headlamp switch input circuit shorted
23 Headlamp switch input circuit open
24 Turn hazard switch input circuit shorted
25 Turn hazard switch input circuit open
26 Panel illumination output circuit shorted or open
27 Courtesy/dome lamp output circuit shorted or open
28 Glovebox/map lamp output circuit shorted or open
29 Cargo lamp output circuit shorted or open
40 Wiper switch input circuit shorted
41 Wiper switch input circuit open
42 Wash/beam input circuit open
60 Passenger door lock switch input circuit shorted
61 Passenger door lock switch input circuit open or short to voltage
62 Passenger door lock switch input circuit stuck
63 Driver door lock switch input circuit shorted
64 Driver door lock switch input circuit open or short to voltage
65 Driver door lock switch input circuit stuck
66 All door lock output circuit shorted to ground or voltage
67 All door unlock output circuit shorted to ground or voltage
68 Driver door unlock output circuit shorted to ground or voltage
69 Passenger cylinder lock switch input circuit shorted
6B Passenger cylinder lock switch input circuit stuck
6C Driver cylinder lock switch input circuit shorted
6E Driver cylinder lock switch input circuit stuck
80 Incorrect odometer value found
81 Remote radio switch circuit high
82 Remote radio switch circuit stuck
A0 Internal module FLASH memory checksum failure
A1 Internal module bootloader failure
A3 BATTERY voltage open
A4 Ignition RUN/START circuit rationality check
A5 TCCM messges not received
A6 Ignition UNLOCK circuit rationality check
A7 VIN checksum error
A8 VIN previously stored
A9 PCI Bus internal failure
AA PCM messages not received
AB TCM messages not received
AC ABS messages not received
AD FCM messages not received
AE ACM messages not received
AF SKIM messages not received
B0 RKE fob battery low
B1 RKE module communication link
B2 Cluster mismatch

 

Thanks wreedCTD. Any thoughts on the P0477 code?

 

P0477-LOW VOLTAGE ON THE ENGINE BRAKE DRIVER
For a complete wiring diagram Refer to Section 8W.
² When Monitored:
When the ignition is on.
² Set Condition:
When the signal from the engine brake driver output does not match the signal from the engine brake driver
feedback.
Possible Causes
WIRING HARNESS
ENGINE BRAKE DRIVER RELAY
FUSED B+ OPEN
ENGINE BRAKE DRIVER SIGNAL CIRCUIT OPEN
INTERMITTENT CONDITION
ENGINE BRAKE DRIVER SIGNAL CIRCUIT SHORTED TO BATTERY NEGATIVE
ECM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)

 

Any idea what is the ENGINE BRAKE DRIVER?

Thanks for the help!

 

negative sir hopefully someone will chime in. i got that directly out of 06 service manual.

 

Thanks.....

 

Pauly did you every find out what caused the p0477 code, mine just threw it today?

 

Not really. It went away on its own after a couple weeks. The only thing I came up with was I had my exhaust brake harness unplugged for a couple days, and I think that triggered the code. It went away after I plugged it back in.

 

Mine threw the same same code. It only throws it though when I use my remote start. Anyone else find anything on this.

 

Do all of you guys have remote starters? My truck also threw the code p0477 and I think that it has something to do with the remote starter. My truck also threw P0513 incorrect immobilizer key. I think im rippin out the remote starter.

 

No remote start here.

 

To those of you with the remote starts......sounds like the installer didn't hook up one of the power supplys at the ignition switch. That code will get set if the engine and everything else is running, and the exh. brake solenoid doesn't have power. Have them double check the install!

 

does anyone know what the 37 or 70 c code means. It came up on my odemeter after leaving my wife sit yesterday. It will not start and we are not sure where to start. We were wandering if an aftermarket remote start would have anything to do with it. we have an 03 dodge 2500 with 104,000 miles on it.