What does trouble code 15 on the thermistor mean?
Typical thermistor resistance values are: Trouble Code 15 indicates that the Coolant Temperature Sensor ( CTS) is reporting abnormally low readings. CTS is used to control fuel mixture, timing, idle speed, TCC and EGR operation, among others. The thermistor used has a high resistance when cold, lowering as the coolant warms.
Which is the error code for throttle position sensor?
ERROR CODE MALFUNCTION DESCRIPTION 22 THROTTLE POSITION SENSOR (TPS) CIRCUIT ( 23 MANIFOLD AIR TEMP (MAT) CIRCUIT (LOW TEM 24 VEHICLE SPEED SENSOR (VSS) CIRCUIT FAILE 25 MANIFOLD AIR TEMP (MAT) CIRCUIT (HIGH TE
What does trouble code 23 on mat sensor mean?
Trouble Code 23 indicates that the Manifold Air Temperature (MAT) sensor is reporting abnormally low readings. When the air is cold, the thermistor in the sensor has a high resistance, which falls as the air charge warms.
What does the P0420 code on a check engine light mean?
When check engine lights are scanned, a p0420 code is a very common result. It’s actually a generic code, meaning it can be thrown from any vehicle after 1996. Commonly, people think the p0420 code indicates that the oxygen sensors need to be replaced, but that’s definitely not always the case.
Why does my engine have trouble code 42?
Trouble Code 42 indicates that there may be a malfunction in the Electronic Spark Timing (EST) system. During cranking, the timing is controlled by the ignition module while the ECM monitors the engine speed. When the engine speed exceeds 400 RPM, the ECM sends a BYPASS signal to the ignition module which switches the timing to ECM control.
What are the conditions for setting code 42?
The conditions for setting code 42 are: System in BYPASS mode but the ignition module is still controlling timing – or – Engine speed > 600 RPM with no EST pulses (ECM controlled timing) going to the ignition module for 200 msec. Typical causes for this code 43 include: 1) BYPASS line is open or grounded 2) EST line is open or grounded
What does the Code 42 on a GM car mean?
Trouble Codes› GM OBD Trouble Codes› GM Code 42 CODE 42 – Electronic Spark Timing or Bypass Fault Trouble Code 42 indicates that there may be a malfunction in the Electronic Spark Timing (EST) system. During cranking, the timing is controlled by the ignition module while the ECM monitors the engine speed.
What happens if your coolant temperature sensor goes bad?
Fuel delivery, ignition timing and engine performance are among the key elements affected by the information the coolant temperature sensor gathers. If it goes bad, it can cause several problems. Signs Your Engine Coolant Temperature (ECT) Sensor Is Bad