DTC P1425/17833 & DTC P1426/17834
Code Definition
z
DTC P1425/17833: EVAP Canister Purge Valve (N80) - Short To Ground
z
DTC P1426/17834: EVAP Canister Purge Valve (N80) - Open Circuit
Test Requirements
Ensure all fuses are okay, battery voltage is at least 11.5 volts and fuel pump relay is okay. Ensure all electrical
accessories are off and A/C is off. Ensure engine is mechanically sound. Ensure no intake or exhaust system
leaks exist. Ensure engine coolant temperature is at least 176°F (80°C).
Test Procedure
1. Connect scan tool. See RETRIEVING DIAGNOSTIC TROUBLE CODES . Turn ignition on. Using
scan tool, check EVAP Canister Purge Valve (N80). See OUTPUT DIAGNOSTIC TEST MODE .
EVAP Canister Purge Valve (N80) should audibly click. EVAP Canister Purge Valve (N80) for Beetle,
GTI and Jetta are located in engine compartment, center of right side fender On Passat, EVAP Canister
Purge Valve (N80) is located by bottom of air cleaner. See Fig. 56 and Fig. 57 .If EVAP Canister Purge
Valve (N80) clicks, erase DTC memory. Perform ECM relearn procedure. See TEST DRIVE
RELEARN PROCEDURE . If DTC does not reset on test drive. Test is complete. If EVAP Canister
Purge Valve (N80) does not click or DTC P0440/16824 or P0441/16825 resets, go to next step.
2. Turn ignition off. Disconnect harness connector from EVAP Canister Purge Valve (N80). Connect LED
test light to EVAP canister purge valve harness connector. Turn ignition on. Using scan tool, check
EVAP Canister Purge Valve (N80). See OUTPUT DIAGNOSTIC TEST MODE . LED test light
should flash. If test light does not flash, go to next step. If test light flashes, replace faulty EVAP Canister
Purge Valve (N80). Erase DTC memory. Verify repair. Test is complete. Perform ECM relearn
procedure. See TEST DRIVE RELEARN PROCEDURE .
3. Turn ignition off. Using DVOM check resistance of EVAP Canister Purge Valve (N80) harness
connector wiring. See appropriate WIRING DIAGRAM under ENGINE PERFORMANCE in SYSTEM
WIRING DIAGRAMS. Resistance should be a maximum of 1.5 ohms for each reading. Check wiring in
harness connector for short circuits to one another and to ground and B+. If resistance is okay and no shot
circuits are present, replace faulty ECM. See ENGINE CONTROL MODULE REMOVAL &
INSTALLATION . Erase DTC memory. Verify repair. Test is complete. Perform ECM relearn
NOTE:
If a test ends with ECM replacement. Before replacing ECM be certain that, all
wiring, power and ground supplies are okay. See ENGINE PERFORMANCE in
SYSTEM WIRING DIAGRAMS article in ELECTRICAL and ECM GROUND &
VOLTAGE SUPPLY .
NOTE:
Output Diagnostic Test Mode is used when using Scan Tools VAG 1551/1552 or
VAS 5051/5052, always continue with output diagnostic test mode until last
component in output diagnostic test mode test sequence has been checked. If
you are not using Scan Tools VAG 1551/1552 or VAS 5051/5052 follow scan tool
manufacturer's instructions.
2003 Volkswagen New Beetle GLS
2002-2003 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo
Helpmelearn Repair Manuals
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