P1895 Actual Torque Circuit Fault

[gtmech]

Anyone had this code (P1895 Actual Torque Circuit Fault) come up before on an Opel Astra G (2004)?

Car has no power, starts missing and the Engine Check Light and traction light comes on. Have to turn ignition off and then on again to move the car again or its absolutely dead with no power when you press the accelerator.

Replaced, Engine ECU, Coil Packs, Air Flo Meter, Spark Plugs.

Maybe this problem is in the transmission circuit? Any ideas guys? This car is driving me nuts! Help anyone please :stickyman:

[gtmech]

can anyone help? this job is a complete nightmare!

[Fordracer4life]

scan the abs it thinks is slipping and kicking in traction control. Have seen it before on us model gm car

[oldford]

What's the engine code and does it have a manual or automatic transmission?

[gtmech]

What's the engine code and does it have a manual or automatic transmission?

XE18

Automatic

[gtmech]

scan the abs it thinks is slipping and kicking in traction control. Have seen it before on us model gm car

no faults recorded with ABS but thanks anyway mate for helping

[vitalyzh]

Try doing Crank relearn...

[gtmech]

Try doing Crank relearn...

never heard of that mate, will OPCOM do it?

[teuton]

The Crankshaft Position (CKP) sensor sends pulses to the PCM as the reluctor wheel teeth rotate past the CKP sensor. The PCM uses the CKP pulses to synchronize the ignition and fuel injector operation, and to time the interval between each CKP pulse. The PCM determines when an excessive change in crankshaft speed occurs by comparing each new time interval with the previous interval. A misfire causes an unexpected change in the crankshaft speed. A certain amount of acceleration/deceleration is expected between each firing stroke, but if the crankshaft speed changes more than an expected amount, the PCM interprets this as a misfire. The interval between CKP sensor pulses is extremely small. At high engine speeds, slight variations in the following components make misfire detection difficult:

Crankshaft
Reluctor wheel
CKP sensor
The PCM learns variations during the Crankshaft Position System Variation Learning Procedure. The PCM compensates for these variations when performing detect misfire calculations. Only a scan tool can command the PCM to perform the Crankshaft Position System Variation Learning Procedure again.
Perform the learning procedure after the following actions:

A PCM replacement
Any operation or repair involving the crankshaft, the CKP sensor, or the CKP sensor to reluctor wheel gap relationship.
An engine replacement.
The ignition switch is in the ON position until the battery is drained.

This is from GM manual



I only know it actually for Us-GM vehicles (also case relearn), as a fix for missfire detection.


This is a link to a cadillac forum with the description if the procedure.

Crank relearn instructions with and without a scan tool (http://www.cadillacforums.com/forums/cadillac-sts-v-series-forum/163666-crank-relearn-instructions-without-scan-tool.html)

[oldford]

First of all, the engine check light is not just for the engine. It is called a MIL (Malfunction Indicator Light) and can be set by both the engine and the automatic gearbox.
P1895 is a gearbox DTC - Actual Torque Circuit Fault.
Tis-2000 (Opel dealer tool) says when P0602 is not stored the gearbox ecu should be replaced.

[gtmech]

First of all, the engine check light is not just for the engine. It is called a MIL (Malfunction Indicator Light) and can be set by both the engine and the automatic gearbox.
P1895 is a gearbox DTC - Actual Torque Circuit Fault.
Tis-2000 (Opel dealer tool) says when P0602 is not stored the gearbox ecu should be replaced.

sorry mate, im confused, are you saying P0602 should always be stored in trans ecu and if it isnt that means the trans ecu is faulty?

[oldford]

When P0602 is stored the ecu should be reprogrammed. When P0602 is NOT stored the ecu should be replaced.

[gtmech]

When P0602 is stored the ecu should be reprogrammed. When P0602 is NOT stored the ecu should be replaced.

the only code stored is P1895, never seen P0602 before so are you saying that means the Trans ECU is screwed and needs to be replaced?

[oldford]

That is what Tis-2000 is saying. No test are described, nothing to be measured, just the instruction to replace.

[Meat-Head]

can you tell what it is yet?

[gtmech]

can you tell what it is yet?

Apart from a complete nightmare, nah buddy, I just cant figure this one out, Im stuck up a a tree with this car, and of course the customer calls everyday, ahhhhh this is a nightmare from hell this car :saint:

[Meat-Head]

Apart from a complete nightmare, nah buddy, I just cant figure this one out, Im stuck up a a tree with this car, and of course the customer calls everyday, ahhhhh this is a nightmare from hell this car :saint:

stuffed for time, bump spam my thread "what would you do" lol
tell you what m-h-m would do.

[gtmech]

stuffed for time, bump spam my thread "what would you do" lol
tell you what m-h-m would do.

Hmm, I can only imagine what you would do Meaty but I dont want to goto Jail, lol, just kidding mate

[gtmech]

Problem solved guys! It was a blocked Catalytic Converter. Finally the nightmare is over, well this one atleast anyway, I have a Reanult Clio coming in next week which I know is going to be another nightmare! So keep an eye open for my Renault thread coming soon to a cinema near you, FREE Admission LOOOOOOOOOOLlollollol

[teuton]

Snapping the throttle while doing a running compression will tell you everything about engine respiration and restriction both on admission and exhaust side.

[Meat-Head]

Snapping the throttle while doing a running compression will tell you everything about engine respiration and restriction both on admission and exhaust side.

Could you explain for thick people please - in more detail - thanks

[Wolfpack]

I would of thought you would of used a vacuum gauge. at least you fixed it. It is very easy to forget the basics while working on today's cars and trucks. did you charge the person for all the parts you put on the car?

[gtmech]

I would of thought you would of used a vacuum gauge. at least you fixed it. It is very easy to forget the basics while working on today's cars and trucks. did you charge the person for all the parts you put on the car?

of course not, make money a job like this? What are you thinking? lol

[BALI7605]

Hello All,

If you have p1985 dont go to cat, it is the airflow meter. The ECM calculates the load from the rev, and the airflow (there is no other data it could calculate it from) and since the AFM dies gradually it may doesnt even come up as a fault but it confuses the ECM. Always go to live data and see the Engine load details. Best regards

[teuton]

Could you explain for thick people please - in more detail - thanks


not the big deal, even for the slimmer ones:viking:

[scoot]

thanks teuton excellent piece and very well explained thanks:goodpost: