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2001 Pontiac Grand Am Diagnostic codes

Tiny
LISA KAPLAN
  • MEMBER
  • 2001 PONTIAC GRAND AM
Engine Mechanical problem
2001 Pontiac Grand Am 6 cyl Two Wheel Drive Automatic 128 k miles

I used a Actron Auto scanner on my daughters car and we received 4 codes
P1546
P0122
P1122
P1189

I do not have the proper CD to tell me what parts I need to get to fix her car. The car will not start. We just replaced the fuel pump and fuel is getting to the top of the engine but it will not turn over. Can you tell me what parts I would need for these codes.

Lisa
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Saturday, October 10th, 2009 AT 2:00 PM

6 Replies

Tiny
OBXAUTOMEDIC
  • MECHANIC
  • 3,711 POSTS
Hi Lisa,

Here are the Code Defs.

P0122 Throttle/Pedal Position Sensor/Switch A Circuit Low Input - Could be the result of the TPS below.

P1122 Throttle Position (TPS) Sensor Inconsistent With MAF Sensor Low Voltage - Would replace this one. Then see if starts. And I take when you said it won't turn over you mean that it turns over just won't start.

P1189 Fuel Control (Bank 2 Sensor 1) - This is possibly a bad O2 Sensor. But could be caused by the TPS above.

P1546 Air Conditioning (A/C) Clutch Relay Control Circuit - Wouldn't worry to much with this one right now.

.
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Thursday, July 30th, 2020 AT 2:23 PM
Tiny
SERVICE WRITER
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OBX just stole my thunder LOL.
I'll second the relacement on the TPS.

P1189 may be related to the engine oil pressure switch circuit for the grand am.
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Thursday, July 30th, 2020 AT 2:23 PM
Tiny
LISA KAPLAN
  • MEMBER
  • 3 POSTS
[quote="obxautomedic"]Hi Lisa,

Here are the Code Defs.

P0122 Throttle/Pedal Position Sensor/Switch A Circuit Low Input - Could be the result of the TPS below.

P1122 Throttle Position (TPS) Sensor Inconsistent With MAF Sensor Low Voltage - Would replace this one. Then see if starts. And I take when you said it won't turn over you mean that it turns over just won't start.

P1189 Fuel Control (Bank 2 Sensor 1) - This is possibly a bad O2 Sensor. But could be caused by the TPS above.

P1546 Air Conditioning (A/C) Clutch Relay Control Circuit - Wouldn't worry to much with this one right now.

So we replaced the TPS sensor and it almost turns over but still will not start. What would you suggust now? Thanks
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Thursday, July 30th, 2020 AT 2:23 PM
Tiny
LISA KAPLAN
  • MEMBER
  • 3 POSTS
So we replaced the TPS sensor and it almost turns over but still will not start. What would you suggust now? Thanks
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Thursday, July 30th, 2020 AT 2:23 PM
Tiny
SERVICE WRITER
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Just to clarify:

It turns over or it does not turn over?
Does not:
https://www.2carpros.com/first_things/car_will_not_crank.htm

Does crank but does not start:
https://www.2carpros.com/first_things/car_cranks_but_wont_start.htm
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Thursday, July 30th, 2020 AT 2:23 PM
Tiny
OBXAUTOMEDIC
  • MECHANIC
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In doing some research on the code P1189. It is possible that it is the Oil Pressure Switch or even the Oil Pump gone bad.

Would need to have oil pressure checked. Or could replace switch and see if that fixes the No Start.

.
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Thursday, July 30th, 2020 AT 2:23 PM

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