Freigh. M2 check engine light when idle

[RETIDEPXE]

"ecu 128" refers to engine. The "sld" you refer to is actually "sid". I found these codes for Cats on a Thompson Built Bus document online. Not sure what if the same for your year but I was able to diagnose which injector went bad on my '06 C9 using them. Looks like SID 231 has the terms "data loss of signal", "transmission link", just thinking outside the box here, you mentioned it affects the operation of the cruise, maybe you have a bad connection to, or bad speed sensor on the trans. You didn't mention what trans but mine has the sensor on the rt side of the Allison automatic, two wires, easy to find.

http://www.autobusthomas.com/pdf/MASTER_Fault_Codes_Combined_2013_2013.01.23.pdf



ECU128 Caterpillar
PID/SID FMI
108 3 barometric pres sensor voltage above normal or shorted high
108 4 barometric pres sensor voltage below normal or shorted low
108 2 barometric pres sensor erratic/incorrect data signal
110 3 coolant temp sensor voltage above normal or shorted high
110 4 coolant temp sensor voltage below normal or open circuit
110 0 coolant temp sensor temperature above normal range
110 11 coolant temp sensor very high coolant temperature
111 2 coolant level sensor invalid signal
111 3 coolant level sensor voltage above normal or shorted high
111 4 coolant level sensor voltage below normal or open circuit
111 1 coolant level sensor level below normal range
111 11 coolant level sensor very low coolant level
128 3 sec fuel level voltage below normal or shorted low
128 4 sec fuel level voltage above normal or shorted high
164 2 injection actuation pressure erratic signal
164 3 injection actuation pressure voltage above normal
164 4 injection actuation pressure voltage below normal
164 0 injection actuation pressure excessive pressure
164 11 injection actuation pressure system failure
168 2 ECM failure supply voltage intermittent
168 1 ECM failure supply voltage low
168 0 ECM failure supply voltage high
173 0 exhaust temperature derate for high exhaust temperature
173 11 exhaust temperature derate for very high exhaust temperature
186 4 PTO PTO shutdown switch v oltage low
186 14 PTO PTO shutdown switch occurance
190 0 engine speed overspeed warning
190 2 engine speed loos of data signal
190 11 engine speed erratic signal
224 11 theft deterent active signal
224 14 theft deterent active signal when cranking
231 2 J1939 data incorrect data fron J1939
231 11 J1939 data J1939 configuration
231 12 J1939 data loss of data signal
231 14 J1939 data transmission data link derate
232 3 5 volt supply voltage above normal
232 4 5 volt supply voltage below normal
232 3 sensor supply voltage above normal or shorted high
232 4 sensor supply voltage below normal or shorted low
246 11 brake pedal switch1 switch not responding
247 11 brake pedal switch2 switch not responding
251 12 injector power supply low voltage for injector power supply
251 2 ECM failure igniton power lost to ecm
252 11 ECU incorrect engine software
253 2 ECU customer or system parameters
253 14 ECU OEM parameter not programmed
311 14 ATD active regeneration inhibited due to low exhaust temperature
314 3 clean gas induction CGI pressure sensor voltage above normal
314 4 clean gas induction CGI pressure sensor voltage below normal
29
ECU128 Caterpillar
PID/SID FMI
315 2 clean gas induction CGI temp high
315 3 clean gas induction CGI temp sensor voltage above normal
315 4 clean gas induction CGI temp sensor voltage below normal
316 0 clean gas induction CGI flow rate high
316 3 clean gas induction CGI temp sensor voltage above normal
316 4 clean gas induction CGI temp sensor voltage below normal
316 11 clean gas induction CGI flow rate high
316 14 clean gas induction CGI flow rate low
317 5 clean gas induction CGI actuator shaft current below normal
317 6 clean gas induction CGI actuator shaft current above normal
324 0 ATD ATD differential pressure above limits
320 0 ATD ATD filter temperature high
320 1 ATD ATD filter temperature high
320 11 ATD ATD filter temperature very high
320 3 ATD ATD filter temperature sensor voltage above normal
320 4 ATD ATD filter temperature sensor voltage below normal
324 11 ATD ATD differntial pressure, high filter restriction
324 3 ATD ATD differential pressure voltage above normal
324 4 ATD ATD differential pressure voltage below normal
324 2 ATD ATD differential pressure signal erratic
324 1 ATD ATD differential pressure , filter restricted
324 0 ATD ATD differential pressure above limits
327 2 ATD ATD exhaust gas temperature 2 data drifted high
327 3 ATD ATD exhaust gas temperature 2 voltage above normal
327 4 ATD ATD exhaust gas temperature 2 voltage below normal
332 3 aftertreatment fuel pressure control aftertreatment fuel pressure sensor voltage above normal
332 4 aftertreatment fuel pressure control aftertreatment fuel pressure sensor voltage below normal
332 11 aftertreatment fuel pressure control aftertreatment fuel presuure high
333 5 aftertreatment fuel pressure control ARD solenoid current abovenormal
333 6 aftertreatment fuel pressure control ARD solenoid current above normal
334 5 aftertreatment fuel actuator ARD solenoid current below normal
334 6 aftertreatment fuel actuator ARD solenoid current above normal
335 5 aftertreatment ignition ARD ignition current below normal
335 6 aftertreatment ignition ARD ignition current above normal
336 3 aftertreatment 2 fuel pressure sensor voltage above normal
336 4 aftertreatment 2 fuel pressure sensor voltage below normal
336 11 aftertreatment 2 fuel pressure fuel pressure high
341 5 aftertreatment purge air actuator ARD purge air current below normal
341 6 aftertreatment purge air actuator ARD purge air current above normal
349 1 aftertreatment purge air actuator ARD purge air pressure low
349 7 aftertreatment purge air actuator ARD purge pressure not responding
350 5 aftertreatment air pressure control ARD solenoid current below normal
350 6 aftertreatment air pressure control ARD solenoid current above normal
350 7 aftertreatment air pressure control ARD solenoid not responding
356 11 ATD ARD failed to ignite
357 11 ATD ARD loss of ignition
360 11 aftertreatment parked regen manually disabled
373 3 ATD secondary differntial pressure sensor voltage above normal
373 4 ATD secondary differntial pressure sensor voltage below normal

 

[jamom123]

Thanks for all the help everyone.

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[jamom123]

I wonder if the coding is different for CAT and MBE?

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[BobWolf]

If youre showing codes I would recommend you do the wiggle test and clean all of the connectors on the engine and transmission that you can reach. Windy conditions and movement form simply driving will eventually loosen any connector. Brake cleaner works best then give them a quick spray with silicone I prefer CRC or castle. Allot of the time just a little too much looseness or crud or corrosion at a connector is enough to raise havoc or at least turn on that pesky engine light.

If you're oil pressure is off the top three suspects oil pressure sending unit, Injection Control Pressure valve/sensor, and Injection Pressure Regulator sensor. These all work together to regulate idle, oil and fuel rail pressure. I still recommend checking everything you can find and reach.

Here is how I check connectors and for electrical shorts and repair them.

1) Before touching it, look for damage, and or corrosion. If its corroded green or white powdery, swollen wire insulation especially at a connector, leave it alone if you're on the road, what little contact you have may make the difference of you being a driver and a pedestrian. Remember that corrosion was once metal and may still be conducting some current.

2) If it looks o.k. try light gentle traction... By that I mean don't try this when you're all piszed off. Check to see if see if it pulls or wiggles easy this usually means the terminals are worn and all you need to replace is the pigtail or the connector guts. Rebuilding a connector is usualy cheaper not rocket science it requires basic hand tools and some patience. Deutsch style connectors used in automotive applications are usually solderless connectors but, some connectors require a crimping tool to crimp the connectors tight enough. You can assure better quality and eliminate then tool by soldering the connectors its not a deal killer if you can crimp them tight enough but solder is dead nuts.

3) Now for the rocket science as you have to get info from the dealer and you have to talk to the idiots that have no mechanical skill and here them say "Derrrr, we have to plug it in to find the problem, Derrrr..." Yes you guessed it, I have very little to no patience with most dealer service writers and try to avoid taking the truck into them.

Try to find out what the supply voltages to the sensors. Also, what the circuit and sensor ohm ranges are. Use a digital volt/ohm meter and see if it is in specs have someone shake the wire harnesses if you show dropped supply voltage, no supply voltage, infinite resistance, or the resistance fluctuates allot you need to chase the harness and find the damaged wire. If a sensor is out of range, pull it check it for damage, or crud inside, Sometimes you can get away with a good cleaning. Reinstall it test it again if its still out of range, the sensor is bad, swap it out. Don't forget to check all the sensors, connectors, circuits, and wiring harnesses and parts covered by that circuit as a bad sensor reading may be a result of a failed component or additional sensor. Sensors are expensive, so check everything before swapping anything don't do as the dealership does.

4) If there is oil or crud or LIGHT CORROSION in other words, its not caked on and you can see healthy metal terminals both in the plug and the part / sensor an old tooth brush and a can of break clean will clean the connector and sensor up nicely. Give them both a shot of silicone spray and put them together and a quick top coat for good measure doesn't hurt.

When you solder automotive connectors you can use 50/50 lead solder or lead free silver but make sure you use a rosin core solder or acid based flux or it wont hold. Rosin core works best for small and delicate work. After the repair cools, use shrink tubing or tape. I like to paint on some liquid electrical tape as a top coat as a good measure.

Last try to secure wire harnesses so they don't move Nylon zip ties, electrical grommets, and rubber coated metal wire clamps, and liquid electrical tape are perfect. Best part is you can buy them at Home Depot cheaper than the parts store. Also, try to make a relief/ drip loop below the level of the sensor or part so it will allow some wiggle room and keep water out of the socket.

You have the rest of your weekend planed for you.. Good luck let me know how you make out.

Bob Wolf.

 

[tknight]

So what's the general thought
Leave your motor oily and dirty or keep it pressure washed and clean?
Oil on surfaces keep corrosion to a lesser amount I think

 

[jamom123]

Thanks bob for the info.

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[BobWolf]

So what's the general thought
Leave your motor oily and dirty or keep it pressure washed and clean?
Oil on surfaces keep corrosion to a lesser amount I think

DOT will write you up if you're engine is oily. As far as electrical connectors are concerned, clean is king.

 

[BobWolf]

Thanks bob for the info.

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Anytime, I try to help.

 

[jamom123]

Might try checking the connections to the cruise switches and/or replacing the switches. The cruise set button will also flash the ck engine light thereby counting out the codes while driving down the road, so, make sure your cruise on/off switch is on when hitting set/resume switch or else your ck engine light will flash out codes for a period of time.

Thanks for the help. RETIDEPXE

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