codes?
bufferpad
02-23-2005, 08:54 PM
1988 Blazer 4X4. codes 22, 33, and 42. Lost my book. Anyone know what they are for?
sykopenguin
02-23-2005, 09:02 PM
22 = Throttle Position Sensor....Check tps adjustment, check the ECM connector, replace the tps.
33 = Map Sensor...Check the vacuum hoses from the MAP sensor. Check the electrical connections at the ECM. Replace the MAP sensor.
42 = Electronic Spark Timing....EST bypass circuit or EST circuit is grounded or open. A malfunctionaing HEI module can cause this code.
33 = Map Sensor...Check the vacuum hoses from the MAP sensor. Check the electrical connections at the ECM. Replace the MAP sensor.
42 = Electronic Spark Timing....EST bypass circuit or EST circuit is grounded or open. A malfunctionaing HEI module can cause this code.
Rick Norwood
02-23-2005, 09:09 PM
1988 Blazer 4X4. codes 22, 33, and 42. Lost my book. Anyone know what they are for?
My book is for 1995-2001 but here are the codes:
22 Throttle position sensor or circuit - voltage low
33 MAP sensor signal - Voltage High
42 Bypass or Electronic Spark Timing (EST) circuit
My book is for 1995-2001 but here are the codes:
22 Throttle position sensor or circuit - voltage low
33 MAP sensor signal - Voltage High
42 Bypass or Electronic Spark Timing (EST) circuit
bufferpad
02-23-2005, 09:10 PM
thanks
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