Code 33: Map Sensor Signal Bolt High: Notes

WARNING: This page is about a different car, the 1990 Pontiac Firebird and 1990 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

Code 33 will set the following conditions are met:
- Engine running.
- Manifold pressure is greater than specified.
- Throttle angle is less than 2 percent.
- All conditions have been met for 1-5 seconds.

Engine misfire or a low, unstable idle may set a Code 33.

2) With the MAP sensor disconnected, the ECM should recognize a low voltage. If low voltage is shown on "Scan" tester, ECM and harness are not at fault.