Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSPONTIAC1987FIREBIRD FORMULA, 5.0 H, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEM5.0L FEEDBACK CARBURETOR TESTS W/CODESCODE 32 - BARO SENSOR
1987 Pontiac Firebird Formula, 5.0 H, Automatic
Code 32 - BARO Sensor
1987 Pontiac Firebird Formula, 5.0 H, AutomaticSECTION Code 32 - BARO Sensor
NOTE:
The BARO sensor reacts like a MAP sensor in that it measures highest voltage when barometric pressure is highest.
Code 32 says that the ECM has seen a BARO pressure (measured in volts) too low at terminal "1" of the ECM.
NOTE:
The following step numbers refer to the numbers in the accompanying flow chart(s).
- This test checks voltage output from sensor at the ECM. Voltage normally falls within the middle range on table.
- Installing a jumper lead between Baro sensor harness terminals "B" and "C" should cause a voltage reading of more than 2.5 volts at the ECM. This indicates circuits 416 and 432 are okay.
- Possible causes of low voltage in step 2) are checked by measuring voltage between Baro harness terminal "A" and "C". A voltage reading of 4-6 volts limit possible causes to be an open circuit 433, a poor connection at ECM terminal "1" or a faulty ECM.
- This test verifies the presence of reference voltage at Baro harness terminal "C".
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.