ok my dad has a 2003 duramax and he has got a p0087 and a p0540. ever sence the codes have popped up he says his truck smells like deisel bad in the engine and when he gives it gas and lets off it runs rough then gos to the smooth idle almost like a old powerstroke if that helps. help please

 

Check your engine oil see if there is diesel fuel in there. If there is take it to the dealer immediately, tow it dont drive it

 

there is no diesel in the oil

 

how about the exhaust?

 

BTW the P0540


CIRCUIT DESCRIPTION
The engine control module (ECM) uses an intake air heater (IAH) to warm the incoming air for proper cylinder combustion. The ECM grounds the control coil of the IAH relay to energize the heater during cold operation. If the ECM detects voltage on the IAH circuit when the relay is commanded OFF, or incorrect voltage when the relay is commanded ON, a DTC will set.

CONDITIONS FOR RUNNING THE DTC

• The battery voltage is between 10-18 volts .
• The intake air temperature (IAT) is less than 23°C (73°F) with the engine running.

OR

• The coolant temperature is less than 49°C (121°F) with the ignition ON, engine OFF for more than 3 seconds .

CONDITIONS FOR SETTING THE DTC
The heater line voltage is more than 8.1 volts with the relay OFF.

OR

The heater line voltage is between 3.8-8.1 volts with the ignition OFF.

AND

The heater line voltage is less than 0.5 volt below battery voltage with the ignition ON.

OR

The heater line voltage is less than 3.8 volts with the relay OFF.

AND

The reference line voltage is low with the relay OFF.

ACTION TAKEN WHEN THE DTC SETS

• The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
• The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC

• The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
• A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
• Clear the MIL and the DTC with a scan tool.

TEST DESCRIPTION

 

and the run through on testing it

 

the P0087.

CIRCUIT DESCRIPTION
The engine control module (ECM) monitors fuel rail pressure (FRP) using the FRP sensor. If the sensor indicates a pressure less than the commanded rail pressure plus a possible transitional overshoot, the ECM will set diagnostic trouble code (DTC) P0087 for fuel rail pressure too low.

CONDITIONS FOR RUNNING THE DTC

• DTCs P0192, P0193, or P1635 are not set.
• The ignition is ON.

CONDITIONS FOR SETTING THE DTC
The actual FRP is less than 0.0 MPa at 0-400 RPM .

OR

The actual FRP is less than 22.5 MPa at more than 600 RPM .

ACTION TAKEN WHEN THE DTC SETS

• The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
• The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.
• The ECM will limit fuel injection.

CONDITIONS FOR CLEARING THE MIL/DTC

• The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
• A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
• Clear the MIL and the DTC with a scan tool.

DIAGNOSTIC AIDS
A restricted fuel supply line may cause DTCs P0087 and P1093 to set at the same time. Refer to Fuel System Diagnosis (Single Tank) or Fuel System Diagnosis (Dual Tanks). See: Component Tests and General Diagnostics

 

Updates??

 

Please update.

 

Closing: lack of activity.