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OBDII Diagnostic Trouble Codes (DTC’s)

mdvaldosta — Sun, 21 May 2006 18:01:27 +0000

OBDII, California’s second generation of OBD requirements, is a diagnostic system incorporated into the vehicle’s powertrain computer that is designed to assist in pollution reduction and prevention. The OBDII system monitors virtually every component and system that can affect emissions during normal driving, alerting the driver through a dashboard malfunction indicator light (MIL) and storing fault code information for technicians.

Manufacturers can only use the MIL for indication of emission related faults, and not for maintenance reminders, mileage intervals, or any other non-emission-related items. Generally, the OBDII system is required to illuminate the MIL after the same fault has been found in two different driving cycles, which helps to ovoid MIL illumination for random faults or abnormal conditions. The MIL is only allowed to extinguish when the same fault has not been detected on three successive driving cycles. Diagnostic Trouble Codes (DTCs) remain stored for around 40 driving cycles to make sure that information is still available to repair technicians even after the MIL is extinguished.

Below you will find links to meanings of the various trouble codes, both for Ford and other vehicles equipped with the second generation of On Board Diagnostic systems.

Fuel and Air Metering (P0100 – P0296)

Ignition System or Misfire (P0300 – P0389)

Auxiliary Emission Control (P0400 – P0485)

Speed and Idle Control (P0500 – P0580)

Computer Output Circuit (P0600 – P0656)

Transmission (P0700 – P0804)

Ford Specific Trouble Codes (P1000 – P1900)

If you have a fault code and need assistance tracking down the problem, you may register and post your question in our forum. Don’t hesitate to ask a question, some of our members and staff are ASE certified and welcome the opportunity to help you solve your DTC issues.

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Transmission OBDII DTC’s

mdvaldosta — Sun, 21 May 2006 17:38:29 +0000

We’re sorry, the content you’re trying to view has been removed at the request of SAE International. For transmission OBDII DTC’s, along with others, try here.

Didn’t find the DTC were looking for? Go back to the OBDII Diagnostic Trouble Codes index.

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Computer Output Circuit OBDII DTC’s

mdvaldosta — Sun, 21 May 2006 17:34:10 +0000

We’re sorry, the content you’re trying to view has been removed at the request of SAE International. For computer output circuit OBDII DTC’s, along with others, try here.

Didn’t find the DTC were looking for? Go back to the OBDII Diagnostic Trouble Codes index.

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Speed and Idle Control OBDII DTC’s

mdvaldosta — Sun, 21 May 2006 17:31:04 +0000

We’re sorry, the content you’re trying to view has been removed at the request of SAE International. For speed and idle control OBDII DTC’s, along with others, try here.

Didn’t find the DTC were looking for? Go back to the OBDII Diagnostic Trouble Codes index.

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Auxiliary Emission Control OBDII DTC’s

mdvaldosta — Sun, 21 May 2006 17:28:20 +0000

We’re sorry, the content you’re trying to view has been removed at the request of SAE International. For auxiliary emission control OBDII DTC’s, along with others, try here.

Didn’t find the DTC were looking for? Go back to the OBDII Diagnostic Trouble Codes index.

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Ignition System or Misfire OBDII DTC’s

mdvaldosta — Sun, 21 May 2006 17:25:18 +0000

We’re sorry, the content you’re trying to view has been removed at the request of SAE International. For ignition system or misfire OBDII DTC’s, along with others, try here.

Didn’t find the DTC were looking for? Go back to the OBDII Diagnostic Trouble Codes index.

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Fuel and Air Metering OBDII DTC’s

mdvaldosta — Sun, 21 May 2006 17:21:26 +0000

We’re sorry, the content you’re trying to view has been removed at the request of SAE International. For fuel and air metering OBDII DTC’s, along with others, try here.

Didn’t find the DTC were looking for? Go back to the OBDII Diagnostic Trouble Codes index.

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Ford OBDII Diagnostic Trouble Codes (DTC’s)

mdvaldosta — Sun, 21 May 2006 16:31:33 +0000

We’re sorry, the content you’re trying to view has been removed at the request of SAE International. For Ford specific OBDII DTC’s, along with others, try here.

Didn’t find the DTC were looking for? Go back to the OBDII Diagnostic Trouble Codes index.

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Ford Firing Orders

mdvaldosta — Sun, 21 May 2006 16:25:02 +0000

From time to time, even the most experienced technicians need a quick firing order chart for the Ford they’re working on. Below you will find the firing order for the 5.0, 4.6, 3.8, and 2.3 engines. You’ll also find the cylinders in the picture are numbered and also their respective coils.

For those visually impared (why are you working on your car, or even have a car!), or for whatever reason want to copy and paste this information, here is a quick run down of those firing orders. Note that the 351w engine isn’t listed (since it never came in a late model Ford Mustang), but it shares the same firing order as the 5.0 high output (HO) engine.

5.0 HO Firing Order: 1-3-7-2-6-5-4-8
4.6 Firing Order: 1-3-7-2-6-5-4-8
3.8 Firing Order: 1-4-2-5-3-6
2.3 Firing Order: 1-3-4-2

If you need further assistance, visit the Ford forum or you can find the thread related to this discussion here at Modded Mustangs.

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