With Climate Control

The A/C condenser/radiator fans do not run at high speed, but do run at low speed

The A/C condenser/radiator fans do not run at high speed, but do run at low speed

Probable cause: Malfunction in the fan(s) high speed circuit(s)

Do the following troubleshooting as needed:

A/C condenser fan high speed circuit troubleshooting A/C Condenser Fan High Speed Circuit Troubleshooting

Radiator fan high speed circuit troubleshooting Radiator Fan High Speed Circuit Troubleshooting

Probable cause: A/C pressure sensor circuit malfunction

Do the A/C pressure sensor troubleshooting:

A/C pressure sensor circuit low voltage DTC Troubleshooting

A/C pressure sensor circuit high voltage DTC Troubleshooting

NOTE: The A/C pressure sensor can malfunction without setting a DTC

Also check for

Climate control DTCs How to Troubleshoot the Climate Control System

Also check for

Powertrain DTCs

Also check for

Blown fuses No. A4 (7.5 A) and No. A6 (20 A) in the under-hood fuse/relay box

Also check for

Poor ground at G301

Also check for

Poor or loose connections at the terminals