Note: The information provided below only pertains to DTC’s 2060 or P256809 regardless of code description.
In cases of a customer complaint of a CEL and either DTC 2060 or P256809 are current and or stored in the ME ECU, please perform the following diagnosis and provide the following information to the Dealer Technical Support (DTS) group in the form of an on-line DTS case. Once all required information has been entered and attached to the case, then call the DTS hotline for further work instructions.
1 Print-out and or save a copy of the initial short test, fault code freeze frame data via the ME DTC menu, and a ME ECU log.
2 Insure that the vehicle has not been in an accident.
3 Insure that the correct radiator is installed (PZEV radiator = black catalytic coating).
4 Insure the radiator is not damaged or obstructed.
5 Perform a function test of the premair sensor (code must be present). If the test does not pass, then erase the code and perform a function test via the guided test menu. In the event the function test is performed on a hybrid model, then monitor if the function test is inconclusive (i.e. there are no test result data at the conclusion of the test [numerical or graph]). Print and or save both before and after test results (code/no code). Note: If there is no guided test menu, then contact the SDS helpdesk for assistance.
6 Check glycol/water mixture.
7 Check the ground circuit of the premair sensor via a DVOM first and then visually (ground stud must be clean).
8 Check pin bushing tension of premair sensor connector.
9 Check premair sensor installation as outlined in S-B-07.04/87. Note: If the premair sensor detaches from the radiator without breaking and or damaging the sensor tip, then the sensor is not properly installed. If the sensor tip does break off, then the sensor was properly installed.
The on-line DTS case notes should include the following information:
Repair attempts to date = ?
Internal ME software version currently installed = VC?
Accident damage related = yes/no
Correct radiator installed = yes/no
Obstructions of radiator noted = yes/no
PremAir function test result with code present = pass/failed
PremAir function test result with code erased = pass/failed
Resistance test of premair sensor ground circuit = ? ohms
PremAir sensor ground stud condition = clean/not clean
Pin bushing tension of premair sensor connector = loose/tight
Coolant/Antifreeze - water ratio measured at = ? degrees
PremAir sensor properly bonded in place = yes/no
The following SDS data should be attached to the on-line DTS case:
Initial short test
Freeze frame data via the DTC fault menu
ME ECU log
Premair function test result (numerical data and graph)