Why does my dash say no bus?
it means the pcm and bcm and some sensors are not communicating. check all grounds and sensor plugs. “No Bus” means the CCD communication bus is down. This “bus” is the 2 wire communication network that all the computers share information on.
What does no bus mean on a 2006 Jeep Liberty?
A code read at the odometer NO BUS – My oil light Jeep Liberty. Locate the fuse in the fuse box the =Bus fuse may be blown, if the fuse is not blown then the voltage regulator on the back of the instrument panel has gone bad and you will have to pull.
What does no bus mean on a Jeep Patriot?
“no bus” usually indicates a loss of communication between the various modules (computers) on the car.
What does no bus mean on a Chrysler 300?
“No Bus” means the data cable going to the (PCM) computer is unplugged, or the PCM has failed and not able to read the information it is being given. Sometimes just jiggling the PCM causes the ODO “NO BUS” to come on. Sometimes a bad crank or cam sensor can cause this as well.
What does no bus mean on a Dodge Dakota?
If You see a no bus error message on the instrument cluster in Your Dodge Dakota that means that Your gauge cluster has lost communication with the ECU.
What does P1687 code mean?
P1687 Meaning The Diagnostic Trouble Code (DTC) will set when the Powertrain Control Module (PCM) has not received an expected cluster status bus message from the Instrument Cluster within the last 20 seconds.
How do you reset a PCM Dodge Dakota?
1) Disconnect NEG Battery Terminal. 2) Turn the ignition key to the START position and hold for 15-20 seconds. 3) Release key (OFF) and reconnect the battery.
What is a PCM on a Dodge Dakota?
A Dodge’s powertrain control module (PCM) serves as the central computer for a vehicle’s diagnostic system. The PCM analyzes sensor readings and engine functions. As soon as a component within the engine or fueling system malfunctions, the PCM issues a code and labels the problem either “trouble” or “pending.”
What would cause a PCM to go bad?
PCMs typically fail for one of two reasons: voltage overloads (often due to a short in a solenoid or actuator circuit) or environmental factors (corrosion, thermal stress or vibration). If water gets inside a PCM, it can short circuits and set up irreversible corrosion that ruins electronic connections.
How long does it take for the PCM to relearn?
It only takes ~30 seconds for the computer to relearn its settings. Generally it’ll idle high during that time (at least on WJ’s) until it learn them.