Question about 2002 Pontiac Grand Am

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Codes c1222 c1226 c1233 po440 po452

Codes c1222 c1233 c1225 p0452 p0452

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What are the probable causes of DTCs C1226, C1222, C1221, C1233, C1232, C1291, P1106, and P1887?


DTC C1221 LF Wheel Speed Sensor Input Signal is 0
C1222 RF Wheel Speed Sensor Input Signal is 0
DTC C1226 RF Excessive Wheel Speed Variation
DTC C1232 LF Wheel Speed Circuit Open or Shorted
DTC C1233 RF Wheel Speed Circuit Open or Shorted
DTC C1291 Open Brake Lamp Switch Contacts During Deceleration
DTC C1291 detects an open brake switch. The EBCM looks for deceleration rates that may indicate braking action. The EBCM verifies braking action by repeating the method for finding deceleration rates that indicate braking action several times. In each case, the ABS will not be available because the EBCM does not see the brake switch input.
DTC P1106 Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage
DTC P1887 TCC Release Switch Circuit (3.4L)
DTC P1887 TCC Release Switch Circuit (2.4L)
The torque converter clutch (TCC) release switch is part of the automatic transmission fluid pressure (TFP) manual valve position switch. The TFP manual valve position switch is mounted to the transmission valve body. The TCC release switch is normally-closed.
The switch signals the PCM that the TCC is released. This is accomplished by torque converter release fluid pressure acting on the switch contact, thus opening the switch. When the voltage is high on the circuit, the PCM recognizes that the TCC is no longer engaged.
When the PCM determines that the TCC release switch is open (indicating that the TCC is not applied) and the TCC slip speed indicates that the TCC is applied, then DTC P1887 sets. DTC P1887 is a type B DTC.
You have all kind of problems , I suggest you take this to a qualified ASE certified repair shop that has the diagnostic tools to trouble shoot an repair the vehicle . Electrical testing is a must with open circuits an shorts ,plus hooking up a scan tool that reads sensor data .Not just a code reader like at the parts store . This video he has a Chrysler vehicle ,doesn't matter . Test is the same for all make an models !

How to test digital ABS wheel speed sensor

Sep 21, 2015 | 1999 Pontiac Grand Am GT

1 Answer

Two new error codes have shown up, P1189 & C1222. The C1214 error code has been cleared but the C1233 is still showing. What do the new codes mean?


P1189 Oldsmobile: Engine Oil Pressure (EOP) Switch Circuit

C1222 Oldsmobile: Right Front Wheel Speed Sensor Input Signal is 0

C1233Oldsmobile: Right Front Wheel Speed Circuit Open or Shorteduse this, http://www.aboutautomobile.com/DTC/C1214

Jun 08, 2015 | 2002 Oldsmobile Alero

2 Answers

1997 Chevy Malibu LS will go into reverse fine, but not into drive.


If you found blackened transmission fluid in an automatic transmission - I'd say you found your problem! I'd be willing to bet the discoloration is material from internal clutches that has been worn off and caused overheating. Sorry, but this will likely require rebuilding or replacing.

Have a look here for add'l info on tranny oil color:

AGCO Automotive Repair Service Baton Rouge LA Detailed Auto Topics The...

May 15, 2015 | 1997 Chevrolet Malibu

1 Answer

1997 chevy malibu will go into reverse but not drive.


The clutch packs are shot. Time for an overhaul

May 15, 2015 | 1997 Chevrolet Malibu

1 Answer

What is the code c1222 and c1225 means


need to know the vehicle and year at least , lost my mind reading ability years ago !

Jul 18, 2014 | Cars & Trucks

1 Answer

I have a 1999 firebird v6 and have the codes p0452 and p0449 they are both persistent codes but the p0452 comes up first, anyone know a fix?


All you have to do is Google your codes & read up

TYPE: OBD PO452 etc

You know what the fix is

Go to a repair shop & have them smoke test the Evap
System,find all the problems & make the required repairs

Be a good idea to find a repair shop, like you find a doctor

Before you need one

May 15, 2014 | Cars & Trucks

1 Answer

99 olds alero abs trouble codes


looks like all 4 brakes need checked..

Dec 27, 2013 | 1999 Oldsmobile Alero

1 Answer

Po452 2005 nissan armada


Here's a link to your P0452 code.

Mar 15, 2013 | 2005 Nissan Armada

1 Answer

Trouble codes PO440 and PO452


PO440-EVAP SYSTEM NO FLOW DURING PURGE.CODE PO PO452 - FUEL TANK PRESSURE SENSOR CIRCUIT LOW INPUT.

Oct 07, 2012 | Chevrolet Avalanche Cars & Trucks

1 Answer

Po452 and po446 on 04 chevy silverado have replaced fuel pressure sensor and reset but code po452 keep poping up


P0452 evap control pressure low, P0 446 evap vent contol circuit. Becuase you have P0452 you are dealing with a eletrical issue whether you have positive tank pressure or negative pressure, The tool for this is a volt meter.452 happens when you positive pressure and the FTP reads less than 0.1 volts.You need to jump the signal and the reference and monitor the take parameter on a scan data you should read reference voltage.Now if you dont have a scan data tool. inspect the wire for any breaks or shorting 2 thing of concern broken wire to the FTP or a ECM is needed.

Feb 24, 2012 | Chevrolet Silverado 1500 Cars & Trucks

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