What engine ?
Engine Controls and Fuel - 3.5L
Engine Controls and Fuel - 3.9L
Engine Controls and Fuel - 5.3L
DTC P0069: Manifold Absolute Pressure-Barometric Pressure Correlation
Circuit/System Description
The BARO sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The control module supplies 5 volts to the BARO sensor on a 5-volt reference circuit, and provides a ground on a low reference circuit. The BARO sensor provides a voltage signal to the control module on a signal circuit relative to the ambient pressure changes.
The manifold absolute pressure (MAP) sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The control module supplies 5 volts to the MAP sensor on a 5-volt reference circuit, and provides a ground on a low reference circuit. The MAP sensor provides a voltage signal to the control module on a signal circuit relative to the intake manifold pressure changes. The control module compares the BARO sensor to the MAP sensor in order to monitor the BARO sensor operation.
DTC C0899 : Device Voltage Low
Circuit/System Description
The electronic brake control module (EBCM) monitors the ignition voltage level available for system operation. A low voltage condition prevents the system from operating properly.
Circuit/System Testing
Measure the voltage at the battery terminals.
? If less than 12 volts, charge and test the battery.
With a scan tool, read the ignition voltage in the EBCM data list. Verify that battery terminal voltage and ignition voltage readings do not differ more than 1 volt.
? If the difference is more than 1 volt, test the ground circuit of the EBCM for high resistance or replace the EBCM.
If OK, test the charging system.
My engine is 3.9L
0k I had the map sensor fix yesterday cause the check engine light is on it was off now it's back on the code Doc poo69 and Doc co899
Who fixed the MAP sensor ? Was it diagnosed or just replaced ?
For each of these code's there are diagnostic procedures or steps , check scan data , electrical circuit's , computer logic etc.... These code's do not say to replace a part . If the light is back on the MAP sensor wasn't the problem .
Circuit/System Testing
Ignition OFF, disconnect the harness connector at the affected sensor.
Ignition OFF for 90 seconds, test for less than 5 ohms of resistance between the low reference circuit terminal A and ground.
? If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal C and ground.
? If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
? If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.
Verify the scan tool sensor parameter is less than 12 kPa.
? If greater than the specified range, test the signal circuit terminal B for a short to voltage. If the circuit tests normal, replace the ECM.
Install a 3A fused jumper wire between the signal circuit terminal B and the 5-volt reference circuit terminal C. Verify the scan tool sensor parameter is greater than 102 kPa for MAP and greater than 126 kPa for BARO.
? If less than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
If all circuits test normal, test or replace the affected sensor.
I replaced it thxs so much for helping
Do you know anything about testing automotive electrical circuit's ? Using a DVOM - digital volt ohm meter ? That's what is going to need to be done . The step's above ,if you do not under stand what it's telling you to do , sorry but your best bet , take it to a qualified repair shop .
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SOURCE: 2005 DIAGNOSTIC ERROR CODE P0069, CRD ENGINE WONT
Are you traveling high ground like Rocky Mountain?
I will remove the ground cable for 4 minutes to reset all data in ECU.///clock and radio stations too : (
Let the ECU to relearn the local environment parameter.
Here's so info on how to prevent vapor lock
Ride with full tank of gas but NO TOP OFF.
Crack open gas cap carefully during rest stops to release / equalize gas tank pressure'
http://www.estes-park-information.com/vapor-lock.html
Good Luck
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