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Common Ford OBD II (P1) Enhanced Codes |
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The Diagnostic Trouble Codes (DTCs) listed below are some of the most commonly reported on 1996 and newer Ford vehicles. The SUPER AutoScanner Kit CP9150 and the SUPER AutoScanner CP9145 can retrieve both Generic and Enhanced DTCs to the tool. Although the SPANISH AutoScanner CP9138S, AutoScanner CP9135 and PocketScan CP9125 are not designed to retrieve these enhanced codes, many Ford vehicles will send both generic and enhanced codes as well.
Please note that these DTC definitions are provided for reference only. We recommend that you consult a service manual for your vehicle before actually attempting repairs.
If the definition of your code is not listed below, you can use our online code lookup application:
CODE LOOKUP
You can also call our Technical Support department at 1-800-228-7667 (8:00 - 6:00 EST, Monday - Friday), or email your request to tech_support@actron.com.
Many of the larger public library systems keep a fairly complete inventory of factory service manuals in their reference sections. These manuals will contain code definitions and other troubleshooting information that can be very helpful. To order a book containing a complete list of codes for GM, Ford and Chrysler or Asian OBD II vehicles, please visit www.autodatapubs.com.
P1131 Lack Of HO2S1 Switches, Lean (Bank 1, Sensor 1)
P1137 Lack Of HO2S1 Switches, Lean (Bank 1, Sensor 2)
These codes usually do not indicate a problem with the O2 sensor. Rather, the O2 sensor is correcting rich due to an overly lean air/fuel ratio. Check Base Engine Idle, EGR, Fuel System and Air Induction System.
Bank 1 refers to the bank of cylinders containing Cylinder #1.
Sensor 1 refers to the O2 sensor closest to the exhaust manifold.
Sensor 2 refers the O2 sensor downstream of the catalytic converter.
P1132 Lack Of HO2S1 Switches, Rich (Bank 1, Sensor 1)
P1138 Lack Of HO2S1 Switches, Rich (Bank 1, Sensor 2)
These codes usually do not indicate a problem with the O2 sensor. Rather, the O2 sensor is correcting lean due to an overly rich air/fuel ratio. Check Base Engine Idle, EGR, Fuel System and Air Induction System.
Bank 1 refers to the bank of cylinders containing Cylinder #1.
Sensor 1 refers to the O2 sensor closest to the exhaust manifold.
Sensor 2 refers the O2 sensor downstream of the catalytic converter.
P1151 Lack Of HO2S1 Switches, Lean (Bank 2, Sensor 1)
P1157 Lack Of HO2S2 Switches, Lean (Bank 2, Sensor 2)
These codes usually do not indicate a problem with the O2 sensor. Rather, the O2 sensor is correcting rich due to an overly lean air/fuel ratio. Check Base Engine Idle, EGR, Fuel System and Air Induction System.
Bank 2 refers to the bank of cylinders opposite Cylinder #1.
Sensor 1 refers to the O2 sensor closest to the exhaust manifold.
Sensor 2 refers the O2 sensor downstream of the catalytic converter.
P1152 Lack Of HO2S1 Switches, Rich (Bank 2, Sensor 1)
P1158 Lack Of HO2S2 Switches, Rich (Bank 2, Sensor 2)
These codes usually do not indicate a problem with the O2 sensor. Rather, the O2 sensor is correcting lean due to an overly rich air/fuel ratio. Check Base Engine Idle, EGR, Fuel System and Air Induction System.
Bank 2 refers to the bank of cylinders opposite Cylinder #1.
Sensor 1 refers to the O2 sensor closest to the exhaust manifold.
Sensor 2 refers the O2 sensor downstream of the catalytic converter.
P1381 Over Advanced Timing
Over-advanced timing is detected. The PCM detected that the Variable Cam Timing "VCT" position indicated that the camshaft timing was over-advanced when compared to a calibrated limit.
Possible causes are:
Camshaft timing improperly set.
No oil flow to piston chamber.
Low oil pressure.
VCT (variable cam timing) solenoid stuck closed.
Camshaft advance mechanism binding (VCT unit).
P1383 Over Retarded Timing
Over-retarded timing is detected. The PCM detected that the Variable Cam Timing "VCT" position indicated that the camshaft timing was over-retarded when compared to a calibrated limit
Possible causes are:
Camshaft timing improperly set.
No oil flow to piston chamber.
VCT (variable cam timing) solenoid stuck open.
Camshaft advance mechanism binding (VCT unit).
P1401 DPF EGR Sensor
Possible cause: excessive carbon buildup in the EGR valve and intake passage.
P1405 DPF-EGR Sensor Upstream Hose Off or Plugged
P1406 DPF-EGR Sensor Downstream Hose Off or Plugged
These codes are set by the engine computer detecting a vacuum leak or vacuum hose being plugged on the Differential Pressure Feedback Exhaust Gas Recirculation (DPF-EGR) sensor. The upstream and downstream hoses are located on the intake manifold. Use a vacuum pump to test the line for a blockage or leak.
P1443 EVAP Vacuum System, Purge or VMV Fault
Several conditions can cause this code to be set. A loose or broken gas cap, a damaged carbon canister, damaged or plugged fuel vapor hose, a damaged purge solenoid, Purge Flow (PF) sensor or Vapor Management Valve (VMV) are all possible causes. A multimeter or scan tool can be used to test the components.
P1506 Idle Air Control Overspeed Error
P1507 Idle Air Control Underspeed Error
A vacuum leak, a damaged IAC assembly, a stuck IAC valve or throttle valve typically sets one or both of these codes. The IAC can be checked with a scan tool, sensor tester or multimeter. A vacuum leak is one of the most common causes and can be checked with a vacuum pump.
P1537 Intake Manifold Runner Control Open (Bank 1)
P1538 Intake Manifold Runner Control Open (Bank 2)
The long and short intake manifold runners are part of the intake system. The Intake Manifold Runner Controls (IMRC) open and close a valve depending on driving conditions. Misrouted cables, a damaged IMRC housing or springs, binding or disconnected lever/shaft or seized gears can cause this code to be set.
Bank 1 refers to the bank of cylinders containing Cylinder #1.
Bank 2 refers to the bank of cylinders opposite Cylinder #1.
P1744 TCC (Torque Converter Clutch) Solenoid
PCM received a signal that the TCC had failed with the TCC in the off position.
Possible causes are:
Ensure the wiring/harness and connector are in acceptable condition and connector fully seated.
Check continuity of Solenoid signal and VPWR harness circuits.
Check Solenoids/harness for short to power & ground. |
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