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Disable engine light

Engine light is on because of transmission slip. Need to disable light for emissions

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Disabling the "check eng." light will also cause you to fail. One of the checks they do is to see if the light turns on with key in the "on" position also the codes will still be stored in the computer anyway.

Posted on Jan 01, 2014

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Engine code 894


DTC P0894 Transmission Component Slipping
DTC P0894Circuit Description with 4L80-E / 4L85-E Automatic Transmission The powertrain control module monitors the engine speed and the transmission output shaft speed. The PCM calculates turbine shaft speed and torque converter clutch (TCC) slip speed by using inputs from the automatic transmission input shaft speed sensor, automatic transmission output shaft speed sensor, and other transmission components. The forward clutch housing is used as the AT ISS rotor. Whenever the TCC is engaged, engine speed and turbine speed will closely match, indicating low TCC slip speed. In D3, with the TCC engaged, calculated transmission component slip can only occur in the torque converter. In D4 OVERDRIVE, with the TCC engaged, transmission component slip can occur in the TCC or the fourth clutch assembly. If the PCM detects an excessive TCC slip speed in D4 OVERDRIVE, when the TCC should be engaged, then DTC P0894 sets. DTC P0894 is a type C DTC. For California emissions vehicles, DTC P0894 is a type B DTC.DTC Descriptor This diagnostic procedure supports the following DTC: DTC No MAF sensor DTC P0101, P0102 or P0103. No MAP sensor DTC P0106, P0107 or P0108. No TP sensor DTC P0120 or P0220. No VSS DTC P0502 or P0503. No ISS DTC P0716 or P0717. No TCC Stuck Off DTC P0741. No TCC Stuck On DTC P0742. No 1-2 SS valve DTC P0751, P0752 or P0753. No 2-3 SS valve DTC P0756, P0757 or P0758. No TFP manual valve position switch DTC P1810. No TCC PWM solenoid valve DTC P2761. The throttle angle is 10-100 percent. Engine speed is 1,250-5,000 RPM. The TFT is Vehicle speed is TFP manual valve position switch indicates D4. The TCC is commanded ON for 0.04 second or greater. TCC is locked ON for greater than 0.1 second. Commanded The PCM detects slip in the torque converter clutch and/or the fourth gear clutch pack with the TCC in an apply or locked mode. DTC P0894 sets during the second consecutive trip when one of the following conditions occur: The TCC slip speed is 100-550 for 10 seconds for three occurrences.The TCC slip speed is 100-550 for 10 seconds, the PCM commands maximum line pressure. The TCC slip speed is 100-550 for 12.5 seconds, the PCM commands the TCC Off for 2 seconds. The TCC slip speed is 100-550 for 15 sec For California emission equipped vehicles, the PCM illuminates the malfunction indicator lamp during the second consecutive trip in which the Conditions for Setting the DTC are met. For Federal emission equipped vehicles, the MIL is not illuminated. The PCM commands maximum line pressure. The PCM inhibits the TCC engagement. The PCM freezes transmission adaptive functions. The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Freeze Frame, California only, and Failure Records, California and Federal. The PCM stores the DTC P0894 in PCM history during the second consecutive trip, California, or the first trip, Federal, in which the Conditions for Setting the DTC are met. For California emissions, the PCM turns OFF the MIL during the third consecutive trip in which the diagnostic test runs and passes. A scan tool can clear the MIL/DTC. For California emissions, the PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without an emission related diagnostic fault occurring. For Federal emissions, the PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without a non-emission related diagnostic fault occurring. The PCM cancels the DTC default actions when the fault no longer exists and the ignition switch is OFF long enough in order to power down the PCM. A TFP manual valve position switch malfunction can set DTC P0894. A mechanical failure of the shift solenoids or TCC PWM solenoid valve can set DTC P0894. Internal transmission failures can result in a DTC P0894. Sticking or contaminated shift valves may cause intermittent slipping in D4. DTC P0894 defaults to an elevated line pressure condition which may result in partial TCC apply. This may produce an idle surge that could stall the engine. The numbers below refer to the step numbers on the diagnostic table. 3. This step tests the indicated range signal to the actual selected range. A faulty TFP manual valve position switch can set a DTC P0894. 4. This step tests for excessive TCC slip speed while in a commanded TCC lock-up state and in fourth gear; and confirms that the fault is present. 5. This step tests for excessive TCC slip speed while in a commanded TCC lock-up state and in third gear. 6. This step tests for a sticking TCC shift valve. 7. This step tests for proper transmission line pressure.

Apr 18, 2014 | 2005 GMC Sierra 2500HD 4WD

1 Answer

Replaced 2 3 sol in trans goes forward in all gears


Transmission gear assembly and transmission needs inspection. Also check the transmission fluid level. Also is the fluid getting leaked or its low.


There are few very helpful links with solutions to troubleshoot this problem.


========

I suggest you to refer these links.


Click the link below:-----


2000 Toyota Camry: Transmission slipping and Stuck up?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-camry-transmission-slipping.html

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Transmission Slips out of 2nd gear?

http://repairhelpcenter.blogspot.in/2012/02/transmission-slips-out-of-2nd-gear.html

----------

Car engine Overheats and transmission starts slipping?

http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html

-------------

2006 Ford Explorer: Engine Vibrates and gears slipping?

http://whatisbyme.blogspot.in/2012/06/2006ford-explorer-engine-vibrates-and.html

---------------

Clutch slipping problem?

http://howtobyme.blogspot.in/2012/03/clutch-slipping-problem.html

----------

Dodge Anti slip System is not operating?

http://whatisbyme.blogspot.in/2012/07/dodge-anti-slip-system-is-not-operating.html

----------

OD light flashing and transmission fluid leaking?

http://repairhelpcenter.blogspot.in/2012/02/od-light-flashing-and-transmission.html

------------

Transmission fluid leaks near radiator on ford windstar?

http://repairhelpcenter.blogspot.in/2012/02/transmission-fluid-leaks-near-radiator.html

-------------

Ford Windstar transmission fluid leaking?

http://technoanswers.blogspot.in/2012/02/ford-windstar-transmission-fluid.html

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TRANSMISSION REPLACING AND TROUBLESHOOTING


http://alltypesofpartsreplacing.blogspot.com/2012/12/transmission-replacing-and.html

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These details will help.

Thanks.

Dec 07, 2012 | 2005 Pontiac Grand Am

4 Answers

Does the engine management light come on if there is a problem wit the gearbox


yea it does if there is a transmission code it will appear. i naver seen a light come one in a manual transmission except bmw. auto trans will give you a light

Dec 02, 2012 | Cars & Trucks

1 Answer

1986 olds 88 trans slipping


Transmission gear assembly and transmission needs inspection.Also check the transmission fluid level.Also is the fluid getting leaked or its low.

There are few very helpful links with solutions to troubleshoot these problem.

========
I suggest you to refer these links.

Click the link below:-----

2000 Toyota Camry: Transmission slipping and Stuck up? http://whatisbyme.blogspot.in/2012/05/2000-toyota-camry-transmission-slipping.html
-----------
Transmission Slips out of 2nd gear? http://repairhelpcenter.blogspot.in/2012/02/transmission-slips-out-of-2nd-gear.html

----------
Car engine Overheats and transmission starts slipping? http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html

-------------
2006 Ford Explorer: Engine Vibrates and gears slipping? http://whatisbyme.blogspot.in/2012/06/2006ford-explorer-engine-vibrates-and.html

---------------
Clutch slipping problem? http://howtobyme.blogspot.in/2012/03/clutch-slipping-problem.html

----------
Dodge Anti slip System is not operating? http://whatisbyme.blogspot.in/2012/07/dodge-anti-slip-system-is-not-operating.html

----------
OD light flashing and transmission fluid leaking?

http://repairhelpcenter.blogspot.in/2012/02/od-light-flashing-and-transmission.html

------------
Transmission fluid leaks near radiator on ford windstar?

http://repairhelpcenter.blogspot.in/2012/02/transmission-fluid-leaks-near-radiator.html

-------------
Ford Windstar transmission fluid leaking? http://technoanswers.blogspot.in/2012/02/ford-windstar-transmission-fluid.html

-----------

These details will help.
Thanks.

Nov 24, 2012 | Cars & Trucks

1 Answer

Trans starting slipping after modulator replaced


Transmission gear assembly and transmission needs inspection. Also check the transmission fluid level. Also is the fluid getting leaked or its low.


There are few very helpful links with solutions to troubleshoot these problem.


========

I suggest you to refer these links.


Click the link below:-----


2000 Toyota Camry: Transmission slipping and Stuck up? http://whatisbyme.blogspot.in/2012/05/2000-toyota-camry-transmission-slipping.html

-----------
Transmission Slips out of 2nd gear?

http://repairhelpcenter.blogspot.in/2012/02/transmission-slips-out-of-2nd-gear.html

----------
Car engine Overheats and transmission starts slipping?

http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html

-------------
2006 Ford Explorer: Engine Vibrates and gears slipping?

http://whatisbyme.blogspot.in/2012/06/2006ford-explorer-engine-vibrates-and.html

---------------
Clutch slipping problem?

http://howtobyme.blogspot.in/2012/03/clutch-slipping-problem.html

----------
Dodge Anti slip System is not operating?

http://whatisbyme.blogspot.in/2012/07/dodge-anti-slip-system-is-not-operating.html

----------
OD light flashing and transmission fluid leaking?

http://repairhelpcenter.blogspot.in/2012/02/od-light-flashing-and-transmission.html

------------
Transmission fluid leaks near radiator on ford windstar?

http://repairhelpcenter.blogspot.in/2012/02/transmission-fluid-leaks-near-radiator.html

-------------
Ford Windstar transmission fluid leaking?

http://technoanswers.blogspot.in/2012/02/ford-windstar-transmission-fluid.html

-----------


These details will help.

Thanks.

Nov 24, 2012 | 1986 Oldsmobile Delta 88

1 Answer

Meaning of warning lights


Manufacturers spend billions of dollars a year refining their cars' on-board diagnostics systems. However, all of the sophisticated diagnostics in the world will do little good if you don't know what the warning lights mean.
Purpose
Modern automobiles have dozens of sensors to monitor engine, braking and chassis performance. Any deviation from the car's established limits will trigger a dashboard warning light.


Check Engine Light
Check engine lights can indicate failure of the emissions system, fuel injection system, faulty sensor feedback, overheating or lack of voltage, transmission failure, and engine knock ignition system failure.


Brake Lights
Almost all cars have two separate lights for the braking system: a red "ABS" (anti-lock braking system) light and "Brake Warning" light. The former indicates failure of the electronic anti-lock system, the latter a loss of fluid pressure in the brake system itself.


Dynamic Warnings
Many modern cars have traction or stability control systems that prevent and notify the driver of tire slippage. These lights can come in the form of amber "SLIP," "TC," or "TRACTION" lights (for spinning tires), or "ESC" (electronic stability control) lights for a sliding vehicle.


Safety Lights
Most cars have a diagrammatic warning that indicates a door that isn't all the way closed, a seat-belt warning light, and an "airbag disabled/enabled" light. Any or all of these will be red or amber.


Read more: Car OBD2 diagnostic tool

Jul 25, 2012 | Cars & Trucks

2 Answers

The VSC and Check engine light turn on for lexus 1999 the cood is p0500


Toyotas and Lexus cars have some unique feaures. If your fuel cap is loose or the O2 sensors on the exhaust are faulty this results in an emission problem and the engine computer unit (ECU) engages the check engine light and disables the VSC (the VSC light comes on to warn you that it has been disabled). However you have p0500 code which says the car has no speed sensor signal. The seed sensor is located on the side of the final drive from the transmission and its job is to measure the speed of rotation of the output shaft. The ECU will compare the signals from this shaft along with the speed sensors in the wheel hubs. If there is a difference between these signals the VSC is engaged to apply braking effort to which ever wheel is slipping (running faster) than the other or that the transmission speed sensor would warrant.
So you either have an emission fault has fed back to the VSC and speed sensor missing (p0500) condition, or you have a faulty sped sensor which has tripped the VSC light and in turn the CEL.
Check your fuel filler cap is on tight, turn radio off and disconnect the negative lead to the battery for 5 minutes (this should clear the ECU memory of the code error). If p0500 error and CEL and VSC lights come back on then check the electrical connection to the speed sensor. Ensure it is clean and making a good contact, check the wiring for continuity. If everything else looks good consider changing the speed sensor.

Sep 14, 2010 | 1999 Lexus ES 300

1 Answer

Starts shaking while you are driving and the rpms go up, and the emissions light is on


Don't sound too good.......could be Transmission,tork converter..sorry. When the RPM's go up and the car don't move it may need fluid or it's a sign of the transmission slipping....

Dec 29, 2009 | 2003 Ford Escape

2 Answers

Transmission service and emissions lights


one of two things the first is you are due for Transmission service
and on some years it lets you know your trans. is slipping
have the obd codes checked

Jun 20, 2009 | 2001 Volvo S60

1 Answer

1996 monte carlo fault codes po300, 441, 705,


THESE ARE FROM THE GM CODE DIFINITION MANUAL, U NEED TO TAKE THIS TO THE DELAER, U HAVE SOME SERIOUS PROBLEMS TO GIVE THIS MANY CODES.

P0300 - Engine Random Misfire Detected
P0441 - Evaporative Emission Control System Incorrect Purge Flow
P0705 - Trans Range Switch Circuit
P1106 - Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage
P1133 - Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 1 Sensor 1
P1441 - Evaporative Emission (EVAP) System Flow During Non-Purge
P1662 - Cruise Lamp Control Circuit
P1672 - Low Engine Oil Level Lamp Control Circuit
P1870 - Transmission Component Slipping

Mar 24, 2009 | 1996 Chevrolet Monte Carlo

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