Allison Transmission Fault Codes

Error code

Description

Lamp

Check trans

Control system response

C1312

Retarder trigger low voltage

off

Retarder does not turn on

C1313

Retarder trigger signal high voltage

off

Retarder does not turn on

P0122

Intermittent or low gas pedal position sensor signal

off

Default value is used

P0123

High gas pedal position sensor

off

Default value is used

P0218

Oil temperature is too high

off

A control pattern is used in case of temperature rise. Holds 4th gear. Prohibition of torque converter lock. Gear shift adaptation is deactivated.

P0562

Control unit low voltage

off

Prohibition of torque converter lockout. DNA

P0602

The control unit is not programmed

On

Remains neutral

P0610

Error of additional equipment of the car with the control unit

On

Uses TID A Calibration Data

P0613

Control Unit CPU Error

off

All solenoids are off

P0614

Incompatibility of ECM and TCM data   for engine torque control

On

Only neutral, reverse and second gear. Torque lock inhibit, shift adaptation disabled

P0634

Control unit temperature exceeded

On

DNS , SOL OFF , actively hydraulic control.

P063E

There is no input signal about the position of the throttle during auto detection

On

Default value is used

P063F

No coolant temperature signal during auto detection

off

-

P0657

Open circuit HSD1

On

SOL OFF , DNA . Prohibition of torque converter lock, prohibition of main modulation.

P0658

Low voltage in the HSD circuit 1

On

DNS , SOL OFF ,

hydraulic control is active

P0659

High voltage in the HSD circuit 1

On

DNS , SOL OFF ,

hydraulic control is active

P0702

The control unit did not recognize the automatic transmission configuration

On

Uses standard configuration

P0703

Malfunction in a chain of the gauge of a brake

off

On garbage trucks, the inclusion of N - D is not possible . If the code is active, then the retarder is prohibited.

P0708

High signal from the current gear sensor.

On

Ignores the signal of the strip switch

P070C

Low oil level sensor signal

off

-

P070D

High oil level sensor signal

off

-

P0711

Abnormal oil temperature sensor signal

On

Uses the default temperature

P0712

Low oil temperature sensor signal

On

Uses standard temperature

P0713

High oil temperature sensor signal

On

It uses the standard value tamper Aturi

P0716

Turbine wheel speed sensor abnormal signal

On

DNS , automatic transmission is blocked on the current transfer

P0717

No turbine wheel speed sensor signal

On

DNS , automatic transmission is blocked on the current transfer

P0719

ABS brake signal low

off

Takes ABS off

P071A

Incompatible RELS Input

On

RELS function is disabled

P071D

Incorrect special function input (wire 101 and 142)

On

-

P0721

Abnormal output speed sensor signal

On

DNS , automatic transmission remains in the current transmission

P0722

No output speed sensor signal

On

DNS , automatic transmission remains in the current transmission

P0726

Abnormal engine speed sensor signal

off

Uses standard turbine speed

P0727

Missing engine speed sensor signal

off

Uses standard turbine speed

P0729

6th gear ratio incorrect

On

DNS , trying to enable 5th , then 3rd gear

P0731

1st gear ratio incorrect

On

DNS , trying to enable 2nd, then 5th gear

P0732

2nd gear ratio incorrect

On

DNS , trying to enable 3rd, then 5th gear

P0733

3rd gear ratio incorrect

On

DNS , trying to enable 4th, then 6th gear

P0734

4th gear ratio incorrect

On

DNS , trying to turn on 5th, then 3rd gear

P0735

5th gear ratio incorrect

On

DNS , trying to turn on the 6th, then 3rd, then 2nd gear

P0736

Incorrect gear ratio in reverse gear

On

DNS blocked on neutral

P0741

Torque converter slip clutch slides

On

-

P0752

Jamming solenoid SS 1 pressure control valve

On

DNS

P0776

Malfunction in the hydraulic circuit of the PCS 2 solenoid

On

DNS, RPR

P0777

Malfunction in the hydraulic circuit of the PCS 2 solenoid

On

DNS, RPR

P0796

Malfunction in the hydraulic circuit of the PCS 3 solenoid

On

DNS, RPR

P0797

Malfunction in the hydraulic circuit of the PCS 3 solenoid

On

DNS, RPR

P0842

PS voltage sensor low voltage 1. 

On

DNS , automatic transmission remains in the current transmission

P0843

Pressure Sensor High Voltage PS 1. 

On

DNS , automatic transmission remains in the current transmission

P0847

PS 2 pressure sensor low voltage

On

-

P0848

High voltage pressure sensor PS 2

On

-

P0880

Power failure of the control unit during engine operation

off

-

P0881

The voltage at the control unit is too low or is skipping

off

-

P0882

The voltage at the control unit is below normal.

On

DNS , SOL OFF ,

hydraulic control is active

P0883

The voltage on the control unit is above normal

off

-

P088A

Oil filter clogged

off

-

P088B

Oil filter heavily clogged 

off

-

P0894

No torque transmission in first gear

On

DNS remains in 1st gear

P0897

Gear oil needs to be replaced

On

-

P0960

Open circuit pressure modulation valve solenoid

On

-

P0962

Low voltage modulation valve solenoid circuit

On

DNS , SOL OFF , hydraulic control active

P0963

High voltage in the pressure modulation valve solenoid circuit

On

-

P0964

PCS2 Solenoid Open Circuit

On

DNS , SOL OFF , hydraulic control active

P0966

PCS 2 Solenoid Circuit Low Voltage

On

DNS , SOL OFF ,

hydraulic control is active

P0967

PCS 2 Solenoid High Voltage

On

DNS , SOL OFF ,

hydraulic control is active

P0968

PCS3 Solenoid Open Circuit

On

DNS , SOL OFF ,

hydraulic control is active

P0970

PCS 3 Solenoid Circuit Low Voltage

On

DNS , SOL OFF ,

hydraulic control is active

P0971

PCS 3 Solenoid Circuit High Voltage

On

DNS , SOL OFF ,

hydraulic control is active

P0973

Low voltage in the solenoid circuit SS 1

On

DNS , SOL OFF ,

hydraulic control is active

P0974

High voltage in the solenoid circuit SS 1

On

DNS , SOL OFF ,

hydraulic control is active

P0975

Open circuit solenoid SS2

On

On 7-speed automatic transmissions, 1st and 7th gears are not included

P0976

Low voltage in the solenoid circuit SS 2

On

On 7-speed automatic transmissions, 1st and 7th gears are not activated, torque converter lockout

P0977

High voltage in the solenoid circuit SS 2

On

On 7-speed automatic transmissions, 1st and 7th gears are not included

P0989

The signal from the retarder is intermittent

off

Retarder does not turn on

P0990

Retarder sensor signal has a short circuit

off

Retarder does not turn on

P1739

Incorrect gear ratio in low gear

On

DNS , prohibition of work in 1 gear

P1891

Accelerator pedal position sensor signal below normal

off

Uses the standard value for pedal depression

P1892

Accelerator Pedal Position Sensor Signal Above Normal

off

Uses the standard value for pedal depression

P2184

Coolant temperature sensor signal low voltage

off

Uses standard temperature

P2185

Coolant Temperature Sensor High Voltage

off

Uses standard temperature

P2637

Malfunction of the torque control system when shifting gears SEM

On

Disabling SEM

P2641

Violation of the torque limiting system in the lower gears of LRTP

On

Disabling LRTP

P2669

Open circuit HSD2

On

SOL OFF , torque converter inhibit inhibit, main modulation inhibit, DNA

P2670

HSD 2 low voltage

On

DNS , SOL OFF , hydraulic control active

P2671

High voltage in the HSD 2 circuit

On

DNS , SOL OFF , hydraulic control active

P2684

Open circuit HSD3

On

SOL OFF , torque converter inhibit inhibit, main modulation inhibit, DNA

P2685

HSD 3 Low Voltage

On

DNS , SOL OFF ,

hydraulic control is active

P2686

HSD 3 High Voltage

On

DNS , SOL OFF ,

hydraulic control is active

P2714

Malfunction in the hydraulic circuit of the PCS 4 solenoid

On

DNS, RPR

P2715

Malfunction in the hydraulic circuit of the PCS 4 solenoid

On

DNS , SOL OFF ,

hydraulic control is active

P2718

PCS4 Solenoid Open Circuit

On

DNS , SOL OFF ,

hydraulic control is active

P2720

PCS 4 Solenoid Circuit Low Voltage

On

DNS , SOL OFF ,

hydraulic control is active

P2721

PCS 4 Solenoid High Voltage

On

DNS , SOL OFF ,

hydraulic control is active

P2723

Malfunction in the hydraulic circuit of the PCS 1 solenoid

On

DNS, RPR

P2724

Malfunction in the hydraulic circuit of the PCS 1 solenoid

On

DNS, RPR

P2727

PCS1 Solenoid Open Circuit

On

DNS , SOL OFF ,

hydraulic control is active

P2729

Low voltage in the PCS 1 solenoid circuit

On

DNS , SOL OFF ,

hydraulic control is active

P2730

High voltage in the PCS 1 solenoid circuit

On

DNS , SOL OFF ,

hydraulic control is active

P2736

PCS5 Solenoid Open Circuit

On

Prohibition of retarder operation

P2738

PCS 5 Solenoid Circuit Low Voltage

On

Prohibition of work in 1st gear, retarder operation, torque converter lock

P2739

PCS 5 Solenoid Circuit High Voltage

On

Prohibition of retarder operation

P2740

High temperature oil retarders

off

-

P2742

Retarder oil temperature sensor low signal

off

Uses standard oil temperature

P2743

Retarder oil temperature sensor high signal

off

Uses standard oil temperature

P2761

Torque converter solenoid open circuit

On

Torque converter lockout

P2763

Low voltage in the torque converter lock-up solenoid circuit

On

Torque converter lockout

P2764

High voltage lock-up torque converter solenoid circuit

On

Torque converter lockout

P2789

Clutch wear reaches limit value

On

-

P278A

Wrong Kickdown Signal

off

Kickdown mode ban

P2793

Gear Shift Communication Error

On

Ignores PWM control, if the signal through the CAN - bus is also lost, the latter is locked in a selected direction

P2808

Malfunction in the hydraulic circuit of the PCS 6 solenoid

On

DNS, RPR

P2809

Malfunction in the hydraulic circuit of the PCS 6 solenoid

On

DNS, RPR

P2812

PCS6 Solenoid Open Circuit

On

DNS , SOL OFF ,

hydraulic control is active

P2814

PCS 6 Solenoid Circuit Low Voltage

On

DNS , SOL OFF ,

hydraulic control is active

P2815

PCS 6 Solenoid Circuit High Voltage

On

DNS , SOL OFF ,

hydraulic control is active

U0001

High Speed CAN Bus Counter Overflow ( IESCAN )

off

Uses standard values; disables torque control when shifting gears

U0010

CAN Bus Counter Overflow ( IESCAN )

off

Uses standard values; disables torque control when shifting gears

U0100

Loss of communication with the engine / power unit ( J 1586)

On

Uses default values

U0103

Lost Communication With First Gear Shift

On

Remains in the selected gear, monitors the signal for changing the direction of movement. The display goes blank for 10 seconds, then shows - / - - / -

U0115

Communication error with engine control unit

On

Uses standard values, DNA

U0291

Communication error with the secondary gear shifter

On

Remains in the selected gear, monitors the signal for changing the direction of movement. The display goes blank for 10 seconds, then shows - / - - / -

U0304

Primary gear selector not compatible with J 1939 protocol

On

DNS blocked in neutral

U0333

Secondary switch not compatible with J 1939 protocol

On

DNS blocked in neutral

U0400

Violation of data transmission protocol J 1939

On

-

U0404

Inadequate information from the primary gear shifter

On

Remains in the selected gear, monitors the signal for changing the direction of movement. The display goes blank for 10 seconds, then shows - / - - / -

U0442

The control unit receives incorrect data from the engine / powertrain control unit included in data bus J 1939

off

-

U0592

Inadequate information from the secondary gear shifter

On

Remains in the selected gear, monitors the signal for changing the direction of movement. The display goes blank for 10 seconds, then shows - / - - / -