codes need help
#1
codes need help
Long story real short: My dad was pulling a hill with the **** trailor and the CEL came on. I got it home and it turns out i have a 0148 and an 0251. His predaor was on 100. What caused the 0251? Did he pop the RV, if so where is it and can i reset it? If it was because of rail pressure would a dual feed line fix the problem? I have not pulled the dip stick yet but i will by tomorrow. I doubt anything else is wrong because the truck still runs good and has no hiccups.
He will have a quadzilla commander to monitor all of this stuff in about 4 weeks. I told him not to run it but o well. That is classified under NMP.
He will have a quadzilla commander to monitor all of this stuff in about 4 weeks. I told him not to run it but o well. That is classified under NMP.
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#8
Not yet i will have gauges for it in probably about 2 weeks. The light went out today probably becauyse of the starts. I did notice that as i shift there is a weirds noise at about 2500 from the engine and with the pred on 100 it does not seem to pull like it used to.
#9
#10
Okay thanks for the help but i know what the code is. What i dont know is what could have thrown it, what to check for, where to start and what all could be involved with it.
#12
P0251-CP3 PUMP REGULATOR CONTROL
WHEN MONITORED
When the ignition is on.
SET CONDITION
The ECM detects a discrepancy between the PWM supplied to the Electronic Fuel Control Actuator and the PWM returned from the Electronic Fuel Control Actuator.
POSSIBLE CAUSES
WHEN MONITORED
While the engine is running.
SET CONDITION
A deviation between the fuel pressure set point and the actual fuel pressure.
POSSIBLE CAUSES
I would check this first
Ignition on, engine not running.
Disconnect the Fuel Control Actuator (FCA) harness connector.
Connect an incandescent test light across the Fuel Control Actuator driver circuit and the Fuel Control Actuator return circuit at the fuel control actuator harness connector.
Observe the test light.
The ECM will perform a self test of the circuit which should momentarily flash the test light brightly, one time, approximately 20 seconds after being connected.
NOTE:
YES: Replace the Fuel Pump.
my guess is fuel pump.....if not that then I say FCA.
good luck
WHEN MONITORED
When the ignition is on.
SET CONDITION
The ECM detects a discrepancy between the PWM supplied to the Electronic Fuel Control Actuator and the PWM returned from the Electronic Fuel Control Actuator.
POSSIBLE CAUSES
- Fuel pump
- (K181) Fuel control actuator driver open
- (K31) Return circuit open from FCA to ECM
- (K181) Fuel control actuator driver circuit shorted to external voltage
- (K31) Fuel control actuator return circuit shorted to external voltage
- (K31) FCA return circuit shorted to (K181) FCA driver circuit
- (K181) Fuel control actuator driver circuit shorted to ground
- (K181) Fuel control actuator driver circuit shorted to another circuit
- (K31) Fuel control actuator return circuit shorted to another circuit
- Intermittent condition
- ECM
WHEN MONITORED
While the engine is running.
SET CONDITION
A deviation between the fuel pressure set point and the actual fuel pressure.
POSSIBLE CAUSES
- Others DTC's present
- Fuel leaks
- Fuel control actuator
- Fuel pressure sensor
- Cascade overflow valve
- Check valve damaged or blocked
- Fuel return lines obstruction, damage, or debris.
- Lift pump flow
- Air in fuel system
- Leaking fuel injectors or high pressure connectors
- Pressure limiting valve
- High pressure fuel pump
- Intermittent condition
I would check this first
Ignition on, engine not running.
Disconnect the Fuel Control Actuator (FCA) harness connector.
Connect an incandescent test light across the Fuel Control Actuator driver circuit and the Fuel Control Actuator return circuit at the fuel control actuator harness connector.
Observe the test light.
The ECM will perform a self test of the circuit which should momentarily flash the test light brightly, one time, approximately 20 seconds after being connected.
NOTE:
- Check connectors - Clean/repair as necessary.
- Compare test light brightness to that of a direct connection to the battery.
YES: Replace the Fuel Pump.
my guess is fuel pump.....if not that then I say FCA.
good luck