What Does P0654 Mean? The Instrument Panel Cluster (IPC) supplies a voltage to the Engine Speed Output circuit. The Powertrain Control Module...
What Does P0651 Mean? This code indicates that a fault has been detected in the sensor reference voltage “B” circuit. The PCM or one of the other...
What Does P0650 Mean? OBD-II Code P0650 is defined as a Malfunction Indicator Lamp (MIL) Control Circuit Malfunction The purpose of the Check...
What Does P0649 Mean? The oxygen (02) sensors on your car measure the oxygen in the exhaust to determine how rich or lean the ratio of fuel and...
What Does P0648 Mean? A P0648 trouble code means that the PCM or other control module has detected an abnormal reading in the immobilizer lamp...
What Does P0647 Mean? The P0647 code is a generic OBD-II trouble code that detects a problem with the A/C (air conditioning) clutch relay control...
What Does P0646 Mean? A/C clutch relay may also be referred to as A/C compressor clutch relay. A/C clutch relay circuit is monitored when...
What Does P0645 Mean? OBD-II Code P0645 is defined as a A/C Clutch Relay Control Circuit The engine control module (PCM) uses a relay to control...
What Does P0644 Mean? The control module has 2 internal 5-volt reference buses called 5-volt reference 1 and 5-volt reference 2 . Each reference...
What Does P0643 Mean? This code indicates that a fault has been detected in the sensor reference voltage “A” circuit. The PCM or one of the other...
What Does P0642 Mean? OBD-II Code P0642 is defined as a Sensor Reference Voltage "A" Circuit Low The engine control module (PCM) sends out a 5...
What Does P0641 Mean? The poor running symptoms are consistent with a MAP sensor malfunction. In addition, in some cases, a bad MAP sensor will...
What Does P0640 Mean? This means that a voltage that exceeds the level stipulated by the manufacturer hasoccurred. Usually, your Check Engine...
What Does P0639 Mean? This code indicates that the PCM (or one of the other supporting control modules) has detected a malfunction in the...
What Does P0638 Mean? The Powertrain Control Module (PCM) compares the actual Throttle Possition (TP) with the target TP when the engine is...
What Does P0637 Mean? The P0637 code is a generic OBD-II trouble code that signals a problem with the power steering control circuit. The power...
What Does P0636 Mean? OBD-II Code Battery/charging system warning light illuminated is defined as a Power Steering Control Circuit Low Despite...
What Does P0635 Mean? The Engine Control Module (ECM) monitors the Power Steering Control Circuit. The ECM sets the OBDII code when the Power...
What Does P0634 Mean? Regarding the P0634 code, it would probably be worthwhile to carefully inspect the wire harness near the intake manifold...
What Does P0632 Mean? OBD-II Code P0632 is defined as a Odometer not Programmed - ECM/PCM When the engine computer (PCM) is replaced, certain...
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