GM OBD Trouble Code 32

Baro Sensor Circuit Error (Carburetor only)

EGR circuit Error

[Map Sensor Signal Open

](/gm-obd-code-32#MAP_Sensor)

• Depending on the model, code 32 can refer to three different systems.
• Please choose from one of the above links for specific information on each system.

Baro Sensor Circuit Error (Carburetor only)

The ECM monitors the Baro Sensor circuit. Code 32 can set when the circuit is open or shorted.

Fault Code Description

• 32 - Barometric Pressure Sensor Circuit fault.

Symptoms

• Rich running engine at high altitude
• Lean running engine at low altitude

Common Problems

• Faulty Barometric Pressure Sensor
  
• Damaged sensor wiring
  

EGR circuit Error

If the ECM monitors EGR operation. Code 32 can be set if the EGR system is not performing up to factory specifications.

Fault Code Description

• 32 - EGR circuit error

Symptoms

• Engine ping
• Rougher that normal idle
  

Common Problems

• EGR valve sticking open or closed
• Plugged EGR passage

MAP Sensor Signal Open

The ECM monitors the incoming MAP sensor signal. Code 32 can set if the signal voltage is 5V.

Fault Code Description

• 32 - Manifold Absolute Pressure sensor signal open

Symptoms

• Hard starting
• Rich running engine

Common Problems

• Failed MAP sensor
• Damaged vacuum hose to MAP sensor