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The cost of non-emissions related repairs necessary to make a vehicle testable are the consumer’s
responsibility. If the station determines that the untestable condition is directly related to an emissions failure
and is seeking to use CAP funds to correct the condition, you must contact CAP for authorization.
5.5 Repair Standards
CCR, title 16, Chapter 33, section 3340.41 (d) defines repair standards as follows:
“The specifications and procedures required by section 44016 of the Health and Safety Code shall be the
vehicle manufacturer’s recommended procedures for emission problem diagnosis and repair or the emission
diagnosis and repair procedures found in industry - standard reference manuals and periodicals published by
nationally recognized repair information providers. Smog Check stations and Smog Check technicians shall, at
a minimum, follow the applicable specifications and procedures when diagnosing defects or performing repairs
for vehicles that fail a Smog Check test.”
Systematic Approach
Stations and repair technicians should follow a systematic diagnostic approach, in accordance with standard
industry protocols, that obtains relevant data about the engine and emissions control systems on the vehicle,
based on the type of Smog Check failure.
The systematic approach includes a diagnostic routine that provides sufficient data to diagnose and repair
emissions failures in a cost-effective and efficient manner. Data may include, but is not limited to, compression
readings, leak down percentages, intake manifold vacuum readings, scan tool data, condition of grounds, other
electrical connections along with wiring, oxygen sensor testing, and other industry accepted factory testing
procedures. Diagnostic and repair procedures specified by the vehicle manufacturer should take precedence
over generic procedures.
The diagnosis must ensure that the vehicle’s engine is in good mechanical condition. This should include an
inspection of basic engine operation (i.e., fuel control, individual cylinder contribution, cylinder seal, internal
engine noises, oil burning, etc.) and a comprehensive visual inspection. All defects should be noted on the
station’s work order.
Diagnostic strategies must have the goal of achieving maximum emissions reductions for CAP repair funds
spent. CAP will preapprove only those repairs it determines will be both cost-effective and in compliance with
CCR, title 16, section 3340.41(d). Moreover, CAP will not pay for diagnosis or repair that fails to comply with
CCR, title 16, section 3340.41(d). (see Section 5.5)
A Good Practice
As the technician performs repairs to reduce emissions, compare the emissions readings after the repair (new
emissions baseline) to the first baseline emissions readings. By comparing these readings, the repair
technician can establish if the vehicle’s emissions readings have increased, decreased, or stayed the same
due to the repair.
CAP routinely conducts post audit reviews of repairs performed by STAR stations. In the course of conducting
those reviews, BAR has determined that it is not uncommon for technicians to overlook Technical Service
Bulletins (TSBs), Special Service Messages (SSMs), and manufacturer recalls when diagnosing and repairing
vehicles. Failure to consult these resources can result in stations performing unnecessary and costly repairs.
Remember, TSBs, SSMs, and manufacturer recalls are available through major automotive information
providers as well as manufacturer websites and should always be checked as part of the diagnostic process