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OBDII Error Codes
Everything pertaining to OBDII diagnostics and error code reading and troubleshooting.
132 Cummins articles in this category
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P0706 CHECK SHIFTER SIGNAL When Monitored and Set Condition: When Monitored: Continuously with the ignition on. Set Condition: The DTC will set if there are 3 occurrences in one ignition cycle of an invalid PRNDL code which last for more than 0.1 seconds. POSSIBLE CAUSES SHIFTER OUT OF ADJUSTMENT, TRS T1 SENSE CIRCUIT OPEN TRS T2 SENSE CI
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P0711 TRANSMISSION TEMPERATURE SENSOR PERFORMANCE When Monitored and Set Condition: When Monitored: Continuously with the ignition on and engine running. Set Condition: This DTC will set when the desired transmission temperature does not reach a normal operating temperature within a given time frame. Time is variable due to ambient temperature. Approximate times are starting temperature to warm up time: (-40° F / -40°
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P0712 TRANSMISSION TEMPERATURE SENSOR LOW When Monitored and Set Condition: When Monitored: Continuously with the ignition on and engine running. Set Condition: The DTC will set when the monitored Temperature Sensor voltage drops below 0.078 volts for the period of 0.45 seconds. POSSIBLE CAUSES RELATED DTC'S PRESENT TRANSMISSION TEMPERA
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P0713 TRANSMISSION TEMPERATURE SENSOR HIGH When Monitored and Set Condition: When Monitored: Continuously with the ignition on and engine running. Set Condition: The DTC will set when the monitored Temperature Sensor voltage rises above 4.94 volts for the period of 0.45 seconds. POSSIBLE CAUSES RELATED DTC'S PRESENTTRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT
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P0714 TRANSMISSION TEMPERATURE SENSOR INTERMITTENT When Monitored and Set Condition: When Monitored: Continuously with the ignition on and engine running. Set Condition: The DTC will set when the monitored Temperature Sensor voltage fluctuates or changes abruptly within a predetermined period of time. POSSIBLE CAUSES RELATED DTC'S PRESENT
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P0715 INPUT SPEED SENSOR ERROR When Monitored and Set Condition: When Monitored: The transmission gear ratio is monitored continuously while the transmission is in gear. Set Condition: If there is an excessive change in input RPM in any gear. This DTC can take up to five minutes of problem identification before illuminating the MIL. POSSIBLE CAUSES INPU
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P0720 OUTPUT SPEED SENSOR ERROR When Monitored and Set Condition: When Monitored: The transmission gear ratio is monitored continuously while the transmission is in gear. Set Condition: If there is an excessive change in output RPM in any gear. This DTC can take up to five minutes of problem identification before illuminating the MIL. POSSIBLE CAUSES OUTPUT SPE
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P0725 ENGINE SPEED SENSOR CIRCUIT When Monitored and Set Condition: When Monitored: Continuously with engine running. Set Condition: This code is set when the engine speed sensed by the Transmission is less than 400 RPM and the engine is running (As reported by the PCM over the communication bus) for 2 seconds. This DTC can take up to five minutes of problem identification before illuminating the MIL.
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P0731 GEAR RATIO ERROR IN 1ST When Monitored and Set Condition: When Monitored: The transmission gear ratio is monitored continuously while the transmission is in gear. Set Condition: If the ratio of the Input RPM to the Output RPM does not match the current gear ratio. This DTC can take up to five minutes of problem identification before illuminating the MIL. POSSIBLE CAUSES RELAT
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P0732 GEAR RATIO ERROR IN 2ND When Monitored and Set Condition: When Monitored: The transmission gear ratio is monitored continuously while the transmission is in gear. Set Condition: If the ratio of the Input RPM to the Output RPM does not match the current gear ratio. This DTC can take up to five minutes of problem identification before illuminating the MIL. POSSIBLE CAUSES
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P0733 GEAR RATIO ERROR IN 3RD When Monitored and Set Condition: When Monitored: The transmission gear ratio is monitored continuously while the transmission is in gear. Set Condition: If the ratio of the Input RPM to the Output RPM does not match the current gear ratio. This DTC can take up to five minutes of problem identification before illuminating the MIL. POSSIBLE CAUSES &
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P0836 4WD MUX SWITCH STUCK When Monitored and Set Condition: When Monitored: When Transfer Case in 4WD Low. Set Condition: Four wheel drive (4WD) muxed switch input detected below minimum or above maximum acceptable voltage. POSSIBLE CAUSES TRANSFER CASE POSITION SENSOR INPUT CIRCUIT OPEN TRANSFER CASE POSITION SENSOR INPUT CIRC
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P0837 4WD MUX SWITCH PERFORMANCE When Monitored and Set Condition: When Monitored: Continuously with the ignition on. Set Condition: The 4WD muxed switch input detected in an invalid range or irrational switch state. POSSIBLE CAUSES RELATED DTCS PRESENT TRANSFER CASE SHIFTER OUT OF ADJUSTMENT TRANSFER CASE POSIT
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P0838 4WD MODE SENSOR LOW When Monitored and Set Condition: When Monitored: Continuously with the ignition key on. Set Condition: When the 4WD Mode Sensor input circuit voltage falls below 0.3 volts for 5.72 seconds. POSSIBLE CAUSES TRANSFER CASE POSITION SENSOR INPUT CIRCUIT SHORT TO GROUND TRANSFER CASE POSITION SENSOR INPUT CIRCUIT S
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P0839 4WD MODE SENSOR HIGH When Monitored and Set Condition: When Monitored: Continuously with the ignition key on. Set Condition: When the 4WD Mode Sensor input circuit voltage raises above 4.78 volts for 5.72 seconds. POSSIBLE CAUSES TRANSFER CASE POSITION SENSOR INPUT CIRCUIT OPEN TRANSFER CASE POSITION SENSOR INPUT CIRCUIT SHORT TO
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P1222 - Leak Detection During Motoring NOTE: For a complete wiring diagram, refer to the Wiring Information. When engine is motoring (i.e. Engine is running, but requires no fuel injection) the only required fuel delivery to the rail is due to natural leakage in the system. The natural leakage depends directly on the rail pressure. A definite amount of fuel is required to overcome the natural leakage, for different fuel pressures. The Engine Control Module (ECM) sets Leakage Detected, when the
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P1223 - Leak Detection Based On Quantity Balance NOTE: For a complete wiring diagram, refer to the Wiring Information. There is a required amount of fuel required by the fuel system to keep the system stable. The amount of fuel required depends on fuel pressure, injection quantity, engine speed, and coolant temperature. The Engine Control Module (ECM) sets Leakage Detected, when the fuel flow exceeds an expected value. When a leak is detected in the system, a counter is initiated. When the cou
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P1652 J1850 SHORT TO GROUND When Monitored and Set Condition: When Monitored: While the ignition is on. Set Condition: The ECM detects a short to ground on the J1850. POSSIBLE CAUSES ECM (D25) J1850 SHORTED COMMUNICATION DIAGNOSTIC PROCEDURE Turn the ignition
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P2122 LOW VOLTAGE AT THE APP SENSOR When Monitored and Set Condition: When Monitored: While the key is on and during engine operation. Set Condition: The APPS circuit voltage at the ECM goes below 0.13 volt for more than 2 seconds. POSSIBLE CAUSES APPS (K851) 5-VOLT SUPPLY CIRCUIT OPEN (K22) SIGNAL CIRCUIT OPEN
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P2123 HIGH VOLTAGE AT THE APP SENSOR When Monitored and Set Condition: When Monitored: While the key is on and during engine operation. Set Condition: The APPS signal circuit voltage at the ECM goes above 4.24 volts for more than 2 seconds. POSSIBLE CAUSES APPS (K922) RETURN CIRCUIT OPEN (K22) SIGNAL CIRCUIT SHO
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P2127 LOW VOLTAGE AT THE THROTTLE VALIDATION SWITCH When Monitored and Set Condition: When Monitored: Key on. NOTE: This DTC will remain active until the accelerator pedal is cycled. Be sure to cycle the accelerator pedal after completing any repairs to this circuit and prior to checking DTC status with the. DRBIII® Set Condition: Both Idle and Not Idle switches are in the same state simultaneously for a calib
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P2128 HIGH VOLTAGE AT THE THROTTLE VALIDATION SWITCH When Monitored and Set Condition: When Monitored: Key on. Set Condition: Both Idle and Not Idle switches are in the same state simultaneously for a calibrated amount of time. POSSIBLE CAUSES (K565) IDLE SWITCH CIRCUIT SHORTED TO (K922) RETURN CIRCUIT (K556) NOT IDLE SWITCH CIRCUIT SHO
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P2146 BANK 1 (CYLINDERS 1-3) SHORTED HIGH OR LOW When Monitored and Set Condition: When Monitored: While the engine is running. Set Condition: A circuit failure detected at cylinders 1,2, or 3 or any combination of cylinders 1,2, or 3. POSSIBLE CAUSES OTHER DTC'S HIGH SIDE DRIVER CIRCUIT OPEN LOW SIDE DRIVER CIR
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P2149 BANK 2 (CYLINDERS 4-6) SHORTED HIGH OR LOW When Monitored and Set Condition: When Monitored: While the engine is running. Set Condition: A misfire detected at cylinders 4,5, or 6 or any combination of cylinders 4,5, or 6. POSSIBLE CAUSES OTHER DTC'S HIGH SIDE DRIVER CIRCUIT OPEN LOW SIDE DRIVER CIRCUIT OPE
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P2266 WATER IN FUEL (WIF) SENSOR VOLTAGE TOO LOW When Monitored and Set Condition: When Monitored: Ignition on. Set Condition: Low voltage detected at the WIF signal circuit at the ECM. POSSIBLE CAUSES OTHER DTC'S PRESENT WATER IN FUEL ECM INTERMITTENT CONDITION D
