Ford F150 Pickup. Instruction — part 1385

propane fuel vaporizes at normal barometric pressure at temperatures above -42°C (-44°F), and expands
to 270 times its volume as a liquid. Unnecessary venting of propane fuel can create fire and health
hazards which could cause personal injury or death.

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Be alert for situations that may cause the propane fuel system to vent fuel. These include extremely hot
days, parking near a space heater, or hoisting a vehicle up near a ceiling heater. Release of propane fuel in
a confined area through the pressure relief valve could occur. The release of propane fuel in a confined
area could result in an accumulation of flammable vapors. If fuel is vented near a heat source, a fire or
explosion could occur.

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Do not use paint drying ovens for propane fueled vehicles. The heat of paint drying ovens will increase
the pressure in the fuel tanks. This could cause venting of propane fuel vapor into the oven and result in a
fire from the heat or sparks in the electrical equipment. If the fuel is confined inside an oven an explosion
may occur. When refinishing the body panels of a propane fueled vehicle use spot painting and drying
methods.

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If a confined area, such as a lubrication pit, has been subjected to propane gas the area should be
inspected for adequate oxygen levels by a local health department before being entered or personal injury
or death may occur.

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The fuel system pressure must be relieved before any component can be removed. The fuel tanks must be
evacuated prior to tank removal. Removal of components without pressure relief or tank evacuation can
cause propane fuel to escape into the air and cause injury or death.

DRIVE CYCLES

OBD-II BI-FUEL DRIVE CYCLE DESCRIPTION

OBD-II drive cycle is a pattern of driving in which the PCM will execute all OBD-II diagnostic monitors. Drive
cycle is used to detect first time faults, so that a DTC will be stored in compuvalve memory. When the same
fault is detected in two consecutive trips or if fault is emission related, compuvalve uses the trip information to
decide on whether to illuminate the Malfunction Indicator Light (MIL) will illuminate.

MIL will go off when the fault condition no longer exists or the vehicle is driven 2 miles with no fault. MIL will
also go off if the vehicle switches automatically to GAS mode. DTC will be stored in compuvalve memory until
vehicle has completed 40 drive cycles without repeat of fault.

OBD-II BI-FUEL DRIVE CYCLE

A drive cycle trip is defined as a key on, key off event in which PCM detects the following:

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Engine coolant temperature should exceed 158°F (70°C).

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Engine coolant temperature should change more than 68°F (20°C) after starting engine.

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Engine speed should exceed 400 RPM.

NOTE:

Rough road conditions may prevent certain steady state conditions and steady
accelerations from validating the transmission and load related monitors. On
models with Power Take-Off (PTO), disengage PTO system before performing
drive cycle.

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE Self-Diagnostics - Bi-Fuel - Gasoline/LPG

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Vehicle speed above 3 MPH.

SUMMARY

If no DTC exists but driveability problem still exists, proceed to TROUBLE SHOOTING - NO CODES - BI-
FUEL - GASOLINE/LPG article for symptom diagnosis or intermittent diagnostic procedures.

DIAGNOSTIC TROUBLE CODE DEFINITIONS

DIAGNOSTIC TROUBLE CODE DEFINITIONS

NOTE:

Prior to performing any system test, see HOW TO USE SYSTEM TESTS under
SYSTEM TESTS. On some models, PCM is capable of storing some body DTCs.
If any "B" DTCs are retrieved (example DTC B1213), see appropriate MODULE
COMMUNICATIONS NETWORK article in ACCESSORIES & EQUIPMENT to
determine test to perform.

NOTE:

If Powertrain Control Module (PCM) is replaced, new PCM must be programmed.
See POWERTRAIN CONTROL MODULE RESET under PROGRAMMING. If
Alternate Fuel Control Module (AFCM) is replaced, perform AFCM reset
procedure. See COMPUVALVE RESET under PROGRAMMING. For AFCM
related DTC definitions, see DIAGNOSTIC TROUBLE CODE DEFINITIONS table.
For PCM related DTC definitions, see DIAGNOSTIC TROUBLE CODE
DEFINITIONS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.

DTC

Description

Go To Test

P0107

Manifold Absolute Pressure Sensor Circuit Low Input

DB

P0108

Manifold Absolute Pressure Sensor Circuit High Input

DB

P0112

Intake Air Temperature Sensor Circuit Low Input

(1)

P0113

Intake Air Temperature Sensor Circuit High Input

(1)

P0117

Engine Coolant Temperature Sensor Circuit Low Input

(1)

P0118

Engine Coolant Temperature Sensor Circuit High Input

(1)

P0131

HO2S Circuit Low Voltage (HO2S-11)

H

P0132

HO2S Circuit High Voltage (HO2S-11)

H

P0134

HO2S Circuit No Activity Detected (HO2S-11)

H

P0151

HO2S Circuit Low Voltage (HO2S-21)

H

P0152

HO2S Circuit High Voltage (HO2S-21)

H

P0154

HO2S Circuit No Activity Detected (HO2S-21)

H

P0171

System Too Lean (Bank No. 1)

H

P0172

System Too Rich (Bank No. 1)

H

P0174

System Too Lean (Bank No. 2)

H

P0175

System Too Rich (Bank No. 2)

H

P0182

Fuel Rail Temperature Sensor Circuit Low Input

DA

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE Self-Diagnostics - Bi-Fuel - Gasoline/LPG

CONNECTOR IDENTIFICATION & LOCATION

CONNECTOR VIEWS

P0183

Fuel Rail Temperature Sensor Circuit High Input

DA

P0192

Fuel Rail Pressure Circuit Low Input

DC

P0193

Fuel Rail Pressure Circuit High Input

DC

P0603

Internal Control Module KAM Error

(2)

P2195

HO2S Signal Stuck Lean (HO2S-11)

H

P2196

HO2S Signal Stuck Rich (HO2S-11)

H

P2197

HO2S Signal Stuck Lean (HO2S-21)

H

P2198

HO2S Signal Stuck Rich (HO2S-21)

H

U1011

(3)

SCP Invalid Or Missing Engine Air Intake Data

U

U1071

(3)

SCP Invalid Or Missing Engine Sensor Data

U

U1073

(3)

SCP Invalid Or Data For Engine Coolant

U

U1260

(3)

SCP Single Ended (+) Circuit Failure

UA

U1261

(3)

SCP Single Ended (-) Circuit Failure

UA

U1262

(3)

SCP Communication Bus Fault

UA

U2015

(3)

Signal Link Fault (Non SCP)

UC

(1)

See DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - CNG, FLEX-
FUEL & GASOLINE article.

(2)

Clear DTC and repeat QUICK TEST . Perform COMPUVALVE CHECK. See COMPUVALVE
CHECK under QUICK TEST. If DTC resets, replace compuvalve. See REMOVAL &
INSTALLATION - F150 PICKUP - BI-FUEL - GASOLINE/LPG article.

(3)

All network DTCs listed are Continuous Memory DTCs.

NOTE:

For connector views referred to in diagnostic tests, and circuit functions, see
Fig. 3 -Fig. 35 . In-line harness connectors are identified by "M" (male) or
"F" (female) to identify connector sides.

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE Self-Diagnostics - Bi-Fuel - Gasoline/LPG

Fig. 3: Identifying ALT Fuel Switch Harness Connector C4013F Terminals
Courtesy of FORD MOTOR CO.

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE Self-Diagnostics - Bi-Fuel - Gasoline/LPG