Connect with us

Emissions / Exhaust

Tech Tip: Volkswagen Check Engine Light Is On With Trouble Code P2187

The check engine light is on, with trouble code P2187, too lean off idle bank 1. This “Fast Fix” from Identifix shows how one tech solved this issue.

Advertisement

Advertisement
Click Here to Read More
Advertisement

Vehicle: 2004 Volkswagen Beetle GLS 2.0L, L4, MFI, SOHC

Customer Concern: The check engine light is on, with trouble code P2187, too lean off idle bank 1.

Potential Causes:
– Defective Mass Air Flow (MAF) Sensor
– Leaking Engine Vacuum
– N80 Canister Purge Solenoid

Tests:

1. Check and verify that there are no vacuum leaks or ­un-metered air leaks.

2. Check the MAF sensor grams/second readings as ­follows:

  a. Idle (about 830 rpm) 3.5 grams/sec. or more (4 to 4.5 grams/sec. preferred).

  b. 2,500 rpm no load, 9 to 15 grams/sec. (11 to 12 grams/sec. preferred).

  c. Wide open throttle road (WOT) load (drive vehicle at 45 mph in third gear and perform a WOT acceleration, observe maximum indicated grams/sec. readings on the MAF); 90 or more grams/sec. preferred.

  d. A MAF that exhibits ­consistently lower than normal grams/sec. readings can cause a P0102 code to set.

3. Check for a leaking N80 Canister Control Valve. This can cause a vacuum leak and a lean idle condition.

Confirmed Fix: Replaced the MAF sensor.

Courtesy of Identifix’s “Five Fast Fixes.”

Advertisement
Click to comment

Rules And Regulations For Catalytic Converter Replacement

RETRO 1974: Refilling Catalytic Converters At The Shop

Oxygen Sensor Heater Codes

VIDEO: Diesel Particulate Filters And Regeneration Cycles

Advertisement

POPULAR POSTS

Catalytic Converter Diagnosis

When Should You Replace an Oxygen Sensor?

Timing Belt Replacement on Jeep’s 2.4L PowerTech Engine

Exhaust Noise: How Much is Too Much?

Connect