P0689 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P0689 – Electronic Control Module Power Relay Sense Circuit Low

P0689 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P0689 Possible Causes

Weak battery,Low voltage while cranking,Faulty Engine Control Module (ECM) relay,Blown ECM fuse,Faulty ECM,ECM harness is open or shorted,ECM circuit poor electrical connection

P0689 Description

The Engine Control Module (ECM) monitors the power inputs. The ECM sets the OBDII code when the ECM remains powered up after the ignition switch has been turned OFF.

P1270 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P1270 – Engine RPM Or Speed Limiter Reached

P1270 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1270 Possible Causes

Wheel slippage (water, ice, mud and snow),Excessive engine RPM in neutral,Vehicle drive at a high rate of speed

P1270 Description

Engine RPM/Vehicle Speed Limiter Indicates the vehicle has been operated in a manner which caused the engine or vehicle to exceed a calibration limit. The engine rpm and vehicle speed are continuously monitored by the Powertrain Control Module (PCM). The P1270 code is set when the rpm or speed fall out of calibrated range.

P0219 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P0219 – Engine Overspeed Condition

P0219 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P0219 Possible Causes

Wheel slippage (water, ice, mud, and snow),Excessive engine RPM in NEUTRAL or operated in the wrong transmission gear.

P0219 Description

Indicates the vehicle has been operated in a manner which caused the engine speed to exceed a calibrated limit. The engine RPM is continuously monitored and evaluated by the PCM. The DTC is set when the RPM exceeds the calibrated limit set within the PCM. For additional information on the engine RPM limiter, refer to Section 1, Electronic Engine Control (EC) System Powertrain Control Software.

P1CCA Code: Meaning, Causes, and Symptoms | OBD2 Codes

P1CCA – Excessive Clutch Wear

P1CCA Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1CCA Possible Causes

Worn Odd Clutch,Worn Even Clutch,Transmission Hydraulic System,Transmission Mechanical Operation,Faulty Transmission Controller Module (TCM)

P1CCA Description

This diagnostic detects excessive clutch wear by checking for clutch slippage and low torque transmission of both clutches. The diagnostic compares the odd clutch speed to the engine speed when the engaged gear is an odd gear (1st, 3rd, 5th, Reverse) or the even clutch speed to the engine speed when the engaged gear is an even gear (2nd, 4th, 6th). If the difference in speed is greater than a threshold and the integral over time of the difference in speed is greater than a threshold, then the diagnostic is considered failing.

P2785 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P2785 – Clutch Actuator Temperature Too High

P2785 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P2785 Possible Causes

Worn-out clutches,Faulty Clutch Actuator Temperature Sensor,Clutch Actuator Temperature Sensor harness is open or shorted,Clutch Actuator Temperature Sensor circuit poor electrical connection

P2785 Description

The Transmission Control Module (TCM) monitors the Clutch Actuator Temperature. The TCM sets the OBDII code when the Clutch Actuator Temperature is out of factory specifications.

P1288 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P1288 – Cylinder Head Temp Sensor Out Of Self Test Range

P1288 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1288 Possible Causes

Wrong thermostat,Engine overheated,Low engine coolant level,Faulty Cylinder Head Temperature (CHT) sensor,Cylinder Head Temperature (CHT) sensor harness is open or shorted,Cylinder Head Temperature (CHT) sensor circuit poor electrical connection

P1288 Description

The Cylinder Head Temperature (CHT) Sensor is mounted into the wall of the cylinder head and is not connected to any coolant passages. The CHT sends a signal to the Powertrain Control Module (PCM) indicating the cylinder head temperature. If the temperature exceeds 126?? (-258??), the PCM disables four fuel injectors at a time. The PCM will alternate which four injectors are disabled every 32 engine cycles. The four cylinders that are not being fuel injected act as air pumps to aid in cooling the engine. If the temperature exceeds 154 ?? (310??), the PCM disables all of the fuel injectors until the engine temperature drops below 154?? (310??).

P1289 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P1289 – Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range

P1289 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1289 Possible Causes

P1289 Description

P1290 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P1290 – Cylinder Head Temperature Sensor Low Input

P1290 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1290 Possible Causes

P1290 Description

P128A Code: Meaning, Causes, and Symptoms | OBD2 Codes

P128A – Cylinder Head Temperature Sensor Circuit Intermittent/Erratic

P128A Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P128A Possible Causes

Wrong thermostat,Not at operating range,Engine overheated,Low engine coolant level,Faulty Cylinder Head Temperature (CHT) sensor,Cylinder Head Temperature (CHT) sensor harness is open or shorted,Cylinder Head Temperature (CHT) sensor circuit poor electrical connection

P128A Description

P0687 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P0687 – Engine Control Module Power Relay Control Circuit High

P0687 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P0687 Possible Causes

Weak battery,Low voltage while cranking,Faulty Engine Control Module (ECM) power relay,ECM power relay harness is open or shorted,ECM power relay circuit poor electrical connection,Blown ECM fuse,Faulty ECM

P0687 Description

The powertrain relay is a normally open relay. The relay armature is held in the open position by spring tension. Battery positive voltage is supplied directly to the relay coil and the armature contact at all times. The Engine Control Module (ECM) supplies the ground path to the relay coil control circuit via an internal integrated circuit called an Output Driver Module (ODM). The ODM output control is configured to operate as a low side driver for the powertrain relay. The ODM for the powertrain relay also incorporates a fault detection circuit, which is continuously monitored by the ECM. When the ECM commands the powertrain relay ON, ignition 1 voltage is supplied to the ECM, and to several additional circuits.