Mazda B-Series 1998-06

3.0L V6 VIN U Auto 5

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Trouble Code: U0155



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
A/C System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U0167



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
A/C System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U0302



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
A/C System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1020



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
A/C System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1039



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Speed System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1040



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Speed System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1051



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
ABS System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1131



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Fuel System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1147



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Security System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1451



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Anti-Theft System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1262



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Anti-Theft System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U1900



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Security System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U2013



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Security System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U2023



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Security System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U2050



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Security System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U2051



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Security System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: U2243



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
Vehicle Security System controller is damaged or has failed
 
PCM has failed
 

Trouble Code: P0171



Adaptive Fuel Trim Too Lean (Bank 1)

Possible Causes:



Air leaks after the MAF sensor, or in the PCV or EGR system
 
Base engine -mechanical- fault affecting one or more cylinders
 
Exhaust leaks before or near where the front HO2S is mounted
 
Fuel control sensor out of calibration (i.e., ECT, IAT or MAF)
 
Fuel delivery system supplying too much or too little fuel during idle or cruise speed (weak fuel pump, weak pressure regulator)
 
Fuel Injectors (one or more) is dirty, restricted or leaking fuel
 
HO2S is contaminated, deteriorated or it has failed
 
Vehicle driven low on fuel or driven until it ran out of fuel
 

Trouble Code: P0791



Input Shaft Speed (ISS) Sensor

Possible Causes:



Input Shaft Speed Sensor circuit is open
 
ISS circuit is shorted to ground
 
ISS circuit is shorted to system power (B+)
 
ISS Sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0794



Input Shaft Speed (ISS) Sensor

Possible Causes:



ISS circuit is open
 
ISS circuit is shorted to ground
 
ISS circuit is shorted to system power (B+)
 
ISS sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1742



Torque Converter Clutch Solenoid Circuit Malfunction

Possible Causes:



TCC solenoid control circuit is open or shorted to ground
 
TCC solenoid control circuit is shorted to system power (B+)
 
TCC solenoid is damaged or has failed
 
PCM is damaged
 

Trouble Code: P1749



Electronic Pressure Control Solenoid Circuit Malfunction

Possible Causes:



EPC solenoid control circuit is shorted to system power (B+)
 
EPC solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: U0073



Data Circuit Malfunction

Possible Causes:



SCP data bus to other controller(s) is open or shorted to ground
 
A/C System controller is damaged or has failed
 
PCM has failed
 

 
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