U1112 Engine Error Code

When you check engine light came on code U1112 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However your vehicle's manufacturer may have a different definition for the U1112 OBD-II Diagnostic Network (U) Trouble Code. So you should chech it on your car models.

U1112 Code Symptoms

U1112 Code Reason

U1112 OBD2 may also be triggered by faults earlier down the line. For example, a dirty MAF sensor might be causing the car to overcompensate in its fuel-trim adjustments. As a result, oxygen sensors are likely to report fuel mixture problems.

Power Steering Pressure (PSP) Switch Signal Malfunction The PCM counts the number of times vehicle speed transitions from 0 to a calibratable speed. After a calibratable number of speed transitions the PCM expects that the PSP input should have changed. This DTC is set if the transition is not detected. Vehicle towed with engine running Power steering hydraulic concern was repaired but DTC was not erased PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged Check, if possible, if vehicle was towed or power steering service was performed. Observe PSP V PID while checking wires for intermittents.

U1112 OBD-II Diagnostic Network (U) Trouble Code Description

U1112 SCP (J1850) Invalid or Missing Data for Primary Id so you have to check ODB-II Engine Error Code list.

U1112 Code Review :

The reason of U1112 OBD-II Engine Error Code is U1112 SCP (J1850) Invalid or Missing Data for Primary Id.

U1112 Code Dictionary Meaning:

u - Network Code - Problem is climate control system, lighting, airbags, etc.
1 - MFG - Manufacturer Specific
1 - Fuel And Air Metering
1 - IC Circuit High Voltage
2 - Kick-Down Switch Failed Short