Chevrolet P148A: Cooling Fan Signal Circuit Performance

What Does The Chevrolet P148A Code Mean?

This DTC indicates that the PWM fan duty cycle request from engine control module (Hardwire) is not within 30% of the requested engine cooling fan speed sent to the hybrid/EV powertrain control module 2 via serial data.

Conditions for setting the DTC:

• The 12 V battery voltage is greater than or equal to 9 V.
• The propulsion system is active. T
• he cooling fans are enabled for more than 10 seconds.
• None of the following DTCs are set: P148B, or P148C.

OR

• The 12 V battery voltage is greater than or equal to 9 V.
• The propulsion system is inactive.
• The energy storage system thermal condition request is ActiveCool.
• The cooling fans are enabled for more than 10 seconds.
• None of the following DTCs are set: P148B, or P148C.

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> KAIWEETS Digital Multimeter

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources

Chevrolet Volt Hybrid DTC – OBDG01 HYBRID Diagnostics Document, page 437.