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What does engine diagnostic code 51 mean? - 1984 Chevrolet El Camino

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How to repair if engine cannot race up when vehicle is running in Toyota Model KDN190R-CRPSYT vehicle?


If it is a Tercel or MR2, it is T and E1 terminals. Code 21 is main oxygen sensor signal fault. Code 51 is A/C signal on; DL contact off (in transmission shifter with diagnostic connector jumped). I have no idea what that 51 means.

May 28, 2015 | Toyota Cars & Trucks

1 Answer

What repairs should be made for diagnostic codes 13 and 51 .


which engine, that be first. no? look at it and what is it?
ill pretend 4.0L I-6
old car, with OBD1. code 13 and 51 are fully covered in the FSM.
ever seen and fsm? login to aldata.com and read.
and is discussed , infinitely on all jeep forums on the net. endless.
google that.? yet?
here ill google for you
i google jeep 13
http://www.allpar.com/fix/codes/faults/code13.html

and jeep dtc 51
http://www.allpar.com/fix/codes/faults/code-51-52.html


13 would cause 51s so,...... work that.

Oct 02, 2014 | 1994 Jeep Grand Cherokee

1 Answer

05 sequoia dtc 1201/51


Hi there:This is a CHASSIS fault code... DTC C1201/51 - Engine Control System Malfunction.
Check diagnostic ponout in THIS LINK.
Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Jun 20, 2012 | Toyota Sequoia Cars & Trucks

1 Answer

FLASHING AIRBAG. Code 51 What's this ?


Fault Code 51 - Diagnostic Monitor Internal Thermal Fuse - Open Due to Intermittent Short To Ground

This means that an intermittent short to ground exists in the air bag system. The diagnostic monitor will eventually have to be replaced but only after a visual inspection leads to the repair of a short to ground in the wiring harness.

The following service tips may help you to find intermittent shorts to ground:
Inspect wiring and harness in the areas where they pass through or are located next to metal components (i.e. engine compartment bulkhead, body sheet metal, component mounting brackets, etc.).

Jan 06, 2011 | 1992 Mercury Grand Marquis

1 Answer

1994 F150 Airbag Trouble Code 51


Code 51 means you have to retrieve the real code from the computer.

Ignition switch should be on with engine off.

Locate the black RABS II diagnostic connector.

Disconnect the two halves.
Attach a jumper wire to the black with orange stripe wire side of the diagnostic connector. Ground the jumper wire ground for a few seconds. ABS lamp should start flashing.


Count the flashes. For example, three short flashes followed by one long flash indicates diagnostic trouble Code 4. The code will continue to repeat itself until the key is turned off. A code of 16 means normal system operation.
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The last step of the system test always includes clearing the Keep Alive Memory (KAM).

To do this, simply turn off the ignition while the diagnostic connector halves are separated

Then diagnostic connector should be re-assembled.

After getting the real code, then we can look it up and see what the 51 was trying to tell us to look for.

Sep 05, 2010 | 1994 Ford F150 Styleside Supercab

1 Answer

I have code 51 flashing. Where is the air bag diagnostic module located?


Hi, the code 51 flashing means that the internal fuse is blown and the short to ground is no longer present. If the short to ground returns, the code will change to 13 (air back circuit shorted to ground) or 14 (primary crash sensor circuit shorted to ground), but it will only flash 13 or 14 when the short is present. If the code remains 51, then first find and repair short before replacing the diagnostic monitor (what people call air bag module).
Take care

Aug 03, 2010 | 1994 Mercury Grand Marquis

1 Answer

I have a code 51 blinking air bag light from my 1995 ford taurus. what does this mean


Hi Branda1, It will have to go to a dealer to repair. Air bags are not something you want to do yourself, very dangerous. Here is what code 51 means.. hope this answers your question.. Cobra

Diagnostic Trouble Code 51—Air Bag Diagnostic Monitor Internal Thermal Fuse—Fuse Blown Due to Intermittent Short to Ground Normal Operation
NOTE: The air bag diagnostic monitor contains an internal thermal fuse that is not serviceable. The thermal fuse is controlled by the microprocessor inside the air bag diagnostic monitor . The microprocessor inside the air bag diagnostic monitor will blow the thermal fuse whenever a short on the deployment circuits occurs. The thermal fuse does not blow because of excessive current flowing through it. DO NOT attempt to short circuit the thermal fuse with a circuit breaker or any other type of fuse.

Jul 06, 2010 | 1995 Ford Taurus

2 Answers

SRS light now repeatedly blinks 5-1 problem code - stop/reset?


Sounds like an air bag problem. You will not be able to reset the light without fixing the problem. The steering wheel airbag electrical contact is suspect. Airbag will have to be removed and problem repaired. . I do not recommend you repair the problem unless qualified.

Mar 12, 2009 | 1998 Lincoln Mark VIII

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