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JOHN aka Eauto
JOHN aka Eauto, The Car Guy
Category: Chevy
Satisfied Customers: 15068
Experience:  ase tech
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Im trying to help a friend get her car fixed

Customer Question

hello im trying to help a friend get her car fixed
Submitted: 1 year ago.
Category: Chevy
Customer: replied 1 year ago.
2007 chevy malibu
1G1ZS58F67F119811
2.2 litre
runs terrible feels like a dead miss
pulled PO 106
PO 325
PO 463
P1682i figure the last two are irrevelant its known the car has a quirky gas guage and tempramental ign switchi consulted a freind at local chevy dealer he suggested try map sensor first
i wasnt there but they put a new map on and no change
put old one back on
they (owner of car im just trying to help) took to a local place that does diag work and were told needs pcmnothing further has beed donewhat do you think
Expert:  JOHN aka Eauto replied 1 year ago.

po106 is a map sensor code

DTC P0325

  • Knock Sensor (KS) Circuit
  • DTC P0463 (Sedan)

    DTC Descriptor

    DTC P0463

  • Fuel Level Sensor Circuit High Voltage
  • DTC P1682

    DTC Descriptor

    DTC P1682

  • Ignition 1 Switch Circuit 2

  • Engine may operate in a reduced engine power mode.Circuit/System Verification
  • If DTCs P0685, P0689, P0690, or B1380 are set, diagnose those DTCs first.
  • Ignition ON, engine OFF, observe the Ignition 1 voltage signal, and the EC Ignition Relay Feedback signal parameters, on the scan tool. Both parameter values should display no more than 3 volts difference, between the two parameters.
  • Ignition OFF, observe the ignition 1 voltage signal parameter, on the scan tool. The parameter value should be 0 volts , before the ECM powers down.
  • Circuit/System Testing

  • Ignition ON, observe the Ignition 1 Signal and EC Ignition Relay Feedback scan tool parameters to determine which is less than B+.
  • Ignition OFF, remove the relay that corresponds to the scan tool parameter that is less than B+.
  • Important: 6 ohms or greater in the circuit/underhood fuse block will cause the DTC to set.

  • Ignition On, connect a 3A fused jumper wire between B+ and the applicable ignition 1 circuit terminal. Verify that the applicable scan tool parameter displays B+.
    • If the applicable scan tool parameter is less than the specified value, test the ignition 1 circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
  • If all circuits test normal, test or replace the applicable relay.
Expert:  JOHN aka Eauto replied 1 year ago.

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