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Code 34 and 51

I have a 1995 Chevy Lumina and the check engine light has been coming on about 20 minutes after I start driving. If I turn the car off and turn it back on it's gone for another 20 minutes. The codes it spit out were 34 and 51. What do I need to get repaired, and about how much should it cost me?

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  • Chevrolet Master
  • 21,873 Answers

Code 34 is for the MAP sensor voltage being low which means the sensor is unplugged or faulty. Code 51 is for a problem with the memory chip inside the computer.
If the engine computer is failing it could set the code 34 even if nothing is wrong with the MAP sensor.
The computer and MAP sensor would need to be checked out.

Posted on Jul 15, 2013

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Posted on Jan 02, 2017

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bigawgntown
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SOURCE: check engine light

you need to go to an electronic specialist or you can buy one of the scanners that clears the codes for you from advanced auto or autozone or some place like that.

Posted on Jul 30, 2008

dsacco86
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SOURCE: Code error P1361 Honda CIvic LX 2002

P1361 TDC Sensor Intermittent Interruption (I got this from Engine-Light-Help.com)
TDC should mean Top Dead Center.
It is the sensor that tells the computer the #1 cylinder piston is at the very top. And therefore, fires the spark plug.

Since the maintenance done above, I believe the the timing marks for the timing belt is not lined up properly. Being off by one tooth will cause this problem.

Posted on Mar 21, 2009

  • 7 Answers

SOURCE: the vehicle starts to spit and sputter after I start driving for about 10 minutes and then the check engine light comes on. it will then start driving better

when the last time u did a tune up?

Posted on Apr 30, 2009

MNfisherman
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SOURCE: check engine light keep coming on after repairs

With these computers, anytime your check engine light comes on and than you replace the part, the computer has to be reset with handheld scanner/computer.
So even with a new part, the computer still has to be electronically reset.
Even if there are no codes. You won't have codes because the part is new, but the engine light will remain on until it is reset.

If you have all new parts, no codes, and had the system reset. It could be a problem with the computer itself and will have to be put on a diagnostic computer for further testing.

Posted on May 11, 2009

c17hydro
  • 2984 Answers

SOURCE: Check engine light code p1676 Chevy lumina Ltz

Trouble Code: P1676 (3.8L V6 VIN K Auto)
Evaporative Emission (EVAP) Purge Solenoid

Number of Trips to Set Code: 1
OBD II Monitor Type: CCM Details
Indicators: MIL Details

Trouble Code Conditions:
Conditions for Setting the DTC.
  • The ignition is on.
  • An improper voltage level has been detected on the output circuit which controls the EVAP purge solenoid.
  • The above conditions are present for at least 30 seconds.

Possible Causes:
  • Poor connection at the PCM. Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.
  • Damaged harness.
  • Inspect the wiring harness for damage. If the harness appears to be OK, disconnect the PCM, turn the ignition on and observe a voltmeter connected between the EVAP purge solenoid control circuit and ground at the PCM harness connector while moving connectors and wiring harnesses related to the EVAP purge solenoid. A change in voltage will indicate the location of the malfunction.

1998 Chevrolet Lumina - Powertrain - Engine Controls - 3.8L - DTC P1676 Evaporative Emission (EVAP) Purge Solenoid Control Circuit

Posted on Aug 13, 2010

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