Question about 2003 Volkswagen Passat

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Emission light on

2003 -VW8 sedan 4-motion; DTC codes: P0102:Airflow signal voltage low and P0741: Converter clutch stuck off.
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MAF sensor going out on code PO102.

Posted on Jan 04, 2010

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P0741 Torque Converter Clutch Circuit Performance or Stuck Off OBD-II Trouble Code Technical Description Article by Dan Weller ASE Certified Master Technician Torque Converter Clutch Circuit Performance or Stuck Off This diagnostic trouble code (DTC) is a generic OBD-II powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may vary depending on the model. What does that mean? Modern vehicles equipped with automatic transmissions / transaxles use a torque converter between the engine and transmission to increase the engine torque output and drive the rear wheels. The engine and transmission are actually connected by a fluid coupling mechanism inside of the torque converter which is what multiplies the torque until the speeds equalize and create a "stall" speed where the difference in actual engine RPM and transmission input RPM is around 90% efficient. Torque converter clutch (TCC) solenoids commanded by the Powertrain control module/Engine control module (PCM/ECM) or the Transmission control module (TCM) to direct hydraulic fluid and engage the torque converter clutch to create a solid coupling and increase efficiency. The transmission control module has detected a fault with the circuit that operates the torque converter clutch solenoid. Note: This code is similar to codes P0740, P0742, P0743 and P0744. There may be other diagnostic trouble codes associated with the transmission control module that can only be accessed by using an advanced scan tool. If any additional transmission related DTC's appear in addition to the P0741, an electrical failure is likely. Symptoms Symptoms of a P0741 trouble code may include: Performance or Stuck Off Indicator Lamp (MIL) illuminated (a.k.a. Check Engine Light) Minimal decrease in fuel economy, this will not affect engine performance Potential Causes Causes of this DTC may include: Wiring harness to transmission shorted to ground Torque converter clutch (TCC) solenoid internal short Transmission control module (TCM) Diagnostic Steps for P0741 DTC Wiring harness - Check transmission wiring harness for damage or loose connections. Use a factory wiring diagram to locate the appropriate power source and all connection points between circuits. The transmission may be powered by a fuse or relay, and triggered by the TCM. Disconnect the transmission harness at the transmission connector, power source and TCM. Check for a short to ground inside the transmission internal wiring harness by locating the appropriate + and - pins for the torque converter clutch solenoid. Using a digital volt ohm meter (DVOM) set to ohms scale, check for a short to ground in the circuit with the positive lead on either pin and the negative lead to a known good ground. If resistance is low, suspect a short to ground the internal harness or the TCC solenoid - removing the transmission oil pan may be necessary to further diagnose the TCC solenoid. Test the wiring between the TCM and the wiring harness connector at the transmission case using the DVOM set to ohms. Check for a possible short to ground by moving the negative lead on the DVOM to a known good ground, resistance should be very high or over limit (OL). Torque converter clutch (TCC) solenoid - Check the resistance in the TCC solenoid and internal transmission wiring at the transmission case after removing the transmission harness plug (if applicable, some makes/models use a TCM bolted directly to the transmission case). Some makes/models use a transmission wire harness with the TCC solenoid and internal harness as a single unit. Using the DVOM set to ohms, check for a short to ground with the positive lead on either circit to the TCC and the negative lead on a known good ground. Resistance should be very high or over limit (OL), if it is low, suspect a short to ground. Check for voltage on the power side circuit of the TCC solenoid or at the wire harness connector at the TCM with the DVOM set to volts scale, positive lead at the wire being tested and the negative to a known good ground with the vehicles key on/engine off, battery voltage should be present. If no voltage is present, determine the loss of power back through the circuit using the manufacturers wiring diagrams for reference. Transmission control module (TCM) - Since the torque converter clutch is only activated during certain driving conditions, it will be necessary to monitor the TCM with an advanced scan tool to determine if the TCM is commanding the TCC solenoid and what the actual feedback reading is at the TCM. The TCC solenoid is normally controlled by a duty cycle to engage a more comfortable torque converter cluch engagement. To test if the TCM is actually sending the signal, a graphing multimeter set to duty cycle or a digital storage oscilloscope will be required as well. The positive lead is probed into the wiring harness plugged into the TCM and the negative lead to a known good ground. The duty cycle shold be the same as being commanded by the TCM in the advanced scan tool reading. If the cycle stays at 0% or 100% or is intermittent, re-check connections and if all wiring / solenoid is OK, the TCM may be at fault.

Read more at: http://www.obd-codes.com/p0741
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May 16, 2015 | Cars & Trucks

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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

2 Answers

I was driving on the interstate when my check engine light came on. The code was PO741. I was told it was not major. Shortly afterwards, the check engine light went off, and my car drive normal. Now 4 days...


P0741 is internal transmission failure the clutches fail along with the torque converter and the transmission will need to be replaced.

Check and follow this procedure from Honda Service News November 2003 TITLE:
A/T DTC P0740, P0741 Repair Tips: Another Look APPLIES TO: All Models

SERVICE TIP: If you're doing a repair for DTC P0740 or P0741 (lock-up control system) on any Honda models with A/T, except Passport, refer to this table first:

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If there is no S/B posted on ISIS for the vehicle you're working on, go to the DTC P0740 or P0741 troubleshooting procedure in the Automatic Transmission section of the appropriate S/M or under DTC Troubleshooting in ISIS. If the procedure recommends replacing the A/T, make sure you have a reman A/T on hand. Remove the original A/T, and look at the condition of the torque converter O-ring. Then follow these tips to ensure a lasting repair.

Missing or cut O-ring . If the O-ring is missing or cut, the ATF can leak internally, causing DTC P0740 or P0741 to set. Replace the O-ring, and reuse the original A/T. Make sure the problem has been fixed by connecting the HDS and testdriving the vehicle using the previous DTC P0740 or P0741 freeze data parameters (match the TPS and VSS values for at least 25 seconds ). If the DTC comes back, install the reman A/T. If the DTC doesn't come back, return the reman A/T to the reman center.

Flattened or deformed O-ring . If the O-ring is flattened or deformed, replace the A/T. The O-ring can get damaged if the ATF pump seizes up and overheats. Make sure the problem has been fixed by connecting the HDS and testdriving the vehicle using the previous DTC P0740 or P0741 freeze data parameters (match the TPS and VSS values for at least 25 seconds ).

O-ring is OK . If the O-ring is round and in good condition, the most likely cause for DTC P0740 or P0741 to set is the A/T, the torque converter, or both. Install the reman A/T. Make sure the problem has been fixed by connecting the HDS and test-driving the vehicle using the previous DTC P0740 or P0741 freeze data parameters (match the TPS and VSS values for 25 seconds ). Before you install the reman A/T, make sure the O-ring on the torque converter is properly installed.


Hope helps.

Jun 24, 2011 | 2004 Honda Accord

1 Answer

I recently had problems with my 2005 Mazda MPV stalling. I came to this great site and changed the IAC and it stopped stalling. But 2 days later my check engine light came on. The codes are P2197 P2195...


The descriptions for your codes are:
P2197 - H02S (RF) signal stuck lean
P2195 - H02S (RF) signal stuck lean
P2187 - Fuel System too lean at idle
P0102 - MAF circuit low input

Essentially what's happening is that your MPV is running too lean when at idle. Too much air and not enough fuel. As you speed up - it forces more air into the system which alleviates the problem.

Examine your mass airflow sensor. It should be completely clean - no fuzzies on it at all. If so - purchase some mass airflow sensor cleaner to clean the sensor. ONLY USE THE PROPER CLEANER TO AVOID DAMAGING THE SENSOR. Disconnect the battery to reset the system and turn off check engine light.

Otherwise you will need a scan tool to look at the voltages being supplied to/from the PCM for each of the Heated Oxygen Sensors and the Mass Airflow Sensor to determine which part is creating the problem.

May 25, 2011 | 2005 Mazda MPV

2 Answers

Honda Civic 2005 Check Engine Code P0741 Torque Converter or Stuck Off


Possible causes - Low transmission fluid level
- Dirty transmission fluid
- Faulty torque converter clutch solenoid valve
- Torque converter clutch solenoid valve harness or connectors
- Torque converter clutch solenoid valve circuit is open or shorted
- Transmission internal mechanical problem

Mar 01, 2011 | 1999 Honda Civic

2 Answers

What code is? p0741


CODE PO741 - TORQUE CONVERTER CLUTCH SYSTEM STUCK OFF WHEN THIS CODE COMES UP YOUR TRANSMISION FLUID TOO LOW OR FLUID + FILTER NEED CHANGING YOU HAVE A RESTRICTION IN TRANSMISSION LINES TO RADIATOR CHECK TO MAKE SURE LINES NOT BENT IN ANY WAY.TCC FEED VALVE OR TCC REGULATOR VALVE IS STUCK OFF DUE TO SEDIMENT OR BINDING.THE OIL PRESSURE SCREEN IS CLOGGED OR DEBRIS IN THE OIL PAN.TAKE CAR TO A TRANSMISSION SHOP GOING TO COST YOU.YOU NEED TRANSMISSION FLUSH AND YOU NEED A FILTER AND FLUID CHANGE.ITS NOT CHEAP FIX BUT YOU CAN CHANGE FLUID + FILTER YOUR SELF TO SEE IF IT HELPS BUT BEST TO HAVE SHOP TO FLUSH OUT TORQUE CONVERTER. PUT NEW TRANSMISSION FLUID IN THE ENTIRE SYSTEM SOUND LIKE OLD FLUID CONTAMINATED WITH SEDIMENT NEED TO GET IT ALL OUT TRANSMISSION.

Aug 16, 2010 | 2000 Chevrolet Impala

1 Answer

CODE P0741


P0741 "Torque Converter Clutch Solenoid stuck off"
If the PCM detects high torque converter slip when the TCC is commanded ON, then DTC P0741 sets. The Powertrain Control Module (PCM) controls the Torque Converter Clutch Solenoid Valve (TCC Sol. Valve) Pulse Width Modulation (PWM). The solenoid controls the hydraulic fluid for TCC apply and release. When the TCC is applied, the engine is coupled directly to the transmission through the TCC. The TCC slip speed should be near 0.
Thank you for using Fixya and good luck

Aug 05, 2010 | 2004 Kia Sedona

3 Answers

Vehicle will not shift into overdrive after it gets hot it finally set code 741 tcc code whats that mean


"The PCM controls the torque converter clutch (TCC) solenoid valve pulse width modulation (PWM). The solenoid controls the hydraulic fluid for TCC apply and release. When the TCC is applied, the engine is coupled directly to the transmission through the TCC. The TCC slip speed should be near 0.

If the PCM detects high torque converter slip when the TCC is commanded ON, then DTC P0741 sets. DTC P0741 is a type B DTC.

Conditions for Running the DTC
• No TP DTCs P0121, P0122 or P0123.

• No VSS DTCs P0502 or P0503.

• No AT ISS DTCs P0716 or P0717.

• No TCC stuck ON DTC P0742.

• No IMS DTCs P1820, P1822, P1823 or P1825.

No TCC PWM solenoid valve DTC P1860.

• The engine run time is greater than 5 seconds.

• The time since the gear select lever change is greater than 6 seconds.

• The IMS indicates D2, D3 or D4.

• The transmission gear ratio indicates 2nd, 3rd or 4th gear.

• The transmission fluid temperature is 20-133°C (68-271°F).

• The TP angle is 10-50 percent.

• The engine torque is 43-215 N·m (32-159 lb ft).

• The TCC solenoid valve is commanded ON.

Conditions for Setting the DTC
TCC slip speed exceeds its limit for a given torque for 5 seconds.

Refer to Torque Converter Clutch Slip Speed .

Action Taken When the DTC Sets
• The PCM illuminates the malfunction indicator lamp (MIL) during the second consecutive trip in which the Conditions for Setting the DTC are met.

• The PCM inhibits 4th gear if the transmission is in hot mode.

• The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Freeze Frame and Failure Records.

• The PCM stores DTC P0741 in PCM history during the second consecutive trip in which the Conditions for Setting the DTC are met.

Conditions for Clearing the MIL/DTC
• 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.

• The PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without an emission-related diagnostic fault occurring.

• The PCM cancels the DTC default actions when the ignition switch is OFF long enough in order to power down the PCM.


Apr 21, 2010 | 2001 Cadillac DeVille

2 Answers

Code p0741


Torque Converter Clutch (TCC) Stuck Off.

You may have a faulty TCC solenoid valve.

Simply means the clutch in the torque converter does not engage when you reach cruising speed and will effect overall fuel economy.
Requires workshop/dealer repair.


Oct 12, 2009 | 2003 Cadillac Deville

1 Answer

Diaganosed the car with P0741 and P0440 trouble codes


The P0741 code is a torque converter clutch stuck in the off position and the po 440 code is an evaportative emission control circuit malfunction. The po440 code could be the gas cap not seated properly. Niether has anything to do with the radiator.

Nov 20, 2008 | 1999 Cadillac DeVille

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